This document provides an overview of the phyla Chytridiomycota and Zygomycota. It discusses their key characteristics including habitat, morphology, mode of nutrition, reproduction and life cycles. Chytridiomycota are unique among fungi in having flagellated cells. They are mostly parasites or saprobes in freshwater. Zygomycota form coenocytic hyphae and reproduce sexually via zygospores. Examples discussed are Rhizopus stolonifer bread mold. Both phyla play important ecological roles in decomposition but some species are pathogens of plants, animals or other fungi.
Detail about Basidiomycetes.In this detail about its Ecosystem Relationship,Symbiotic Relationships,General characters,Basidiospores,Life cycle and its Fruiting body.
Contact Email: mzeeshan_93@yahoo.com
Introduction,In some fungi ,true sexual cycle comprising of nuclear fusion and meiosis is absent.
These fungi derive the benefits of sexuality through a cycle know as parasexuaL cycle.
First Reported by- Gudio Pontecorvo and J.A.Roper(1952)
Parasexual cycle was reported in
Aspergillus nidulans,the imperfect stage of Emericella nidulans.
Since then parasexual cycle has been discovered not only in several members of Deutromycetes but also in fungi belonging to Ascomycetes and Basidiomycetes.
DEFINETION - Parasexuality is defined as a cycle in which Plasmogamy, Karyogamy and Meiosis [Haploidization] take place in sequence but not at a specified time or at specified points in the life cycle of an organism.
Generally parasexual cycle occurs in those fungi in which true sexual cycle does not take place.
Parasexualcycle also know as Somatic recombination. PASEXUALITY ALSO REPORTED IN SOME ORGANISMS- Aspergillus nigar, Penicillium crysogenum, STEPS OF PARASEXUAL CYCLE - 1) ESTABLISHMENT OF HETEROKARYOSIS, 2) Formation of Heterozygous DIPLOIDS, 3) occasional mitotic crossing-over during multiplication of diploid nuclei, 4)occasional haplodization through aneuploidy , COMPARISION BETWEEN SEXUAL AND PARASEXUAL CYCLE, IMPORTANCE OF PARASEXUALITY, C0NCLUSION
Heterothallic species have sexes that reside in different individuals. . The term is applied particularly to distinguish heterothallic fungi, which require two compatible partners to produce sexual spores, from homothallic ones, which are capable of sexual reproduction from a single organism.
Detail about Basidiomycetes.In this detail about its Ecosystem Relationship,Symbiotic Relationships,General characters,Basidiospores,Life cycle and its Fruiting body.
Contact Email: mzeeshan_93@yahoo.com
Introduction,In some fungi ,true sexual cycle comprising of nuclear fusion and meiosis is absent.
These fungi derive the benefits of sexuality through a cycle know as parasexuaL cycle.
First Reported by- Gudio Pontecorvo and J.A.Roper(1952)
Parasexual cycle was reported in
Aspergillus nidulans,the imperfect stage of Emericella nidulans.
Since then parasexual cycle has been discovered not only in several members of Deutromycetes but also in fungi belonging to Ascomycetes and Basidiomycetes.
DEFINETION - Parasexuality is defined as a cycle in which Plasmogamy, Karyogamy and Meiosis [Haploidization] take place in sequence but not at a specified time or at specified points in the life cycle of an organism.
Generally parasexual cycle occurs in those fungi in which true sexual cycle does not take place.
Parasexualcycle also know as Somatic recombination. PASEXUALITY ALSO REPORTED IN SOME ORGANISMS- Aspergillus nigar, Penicillium crysogenum, STEPS OF PARASEXUAL CYCLE - 1) ESTABLISHMENT OF HETEROKARYOSIS, 2) Formation of Heterozygous DIPLOIDS, 3) occasional mitotic crossing-over during multiplication of diploid nuclei, 4)occasional haplodization through aneuploidy , COMPARISION BETWEEN SEXUAL AND PARASEXUAL CYCLE, IMPORTANCE OF PARASEXUALITY, C0NCLUSION
Heterothallic species have sexes that reside in different individuals. . The term is applied particularly to distinguish heterothallic fungi, which require two compatible partners to produce sexual spores, from homothallic ones, which are capable of sexual reproduction from a single organism.
This maybe of help for UG+PG Botany students studying mycology. It's about the general account of class Chytridiomycetes. Good for quick revision and information.
*Critics are very welcomed*
A chemical substance that is produced in one portion of an organism and moves by diffusion or transport to another portion of same individual or to other individual of same species where it induce specific response is called a hormone.
Fungi is most abundantly found organism in earth, almost all parts of earth we found earth, here we represent some characteristic with their uses and disadvantages .
Fungi are eukaryotic organisms that include microorganisms such as yeasts, moulds and mushrooms. These organisms are classified under kingdom fungi.
This maybe of help for UG+PG Botany students studying mycology. It's about the general account of class Chytridiomycetes. Good for quick revision and information.
*Critics are very welcomed*
A chemical substance that is produced in one portion of an organism and moves by diffusion or transport to another portion of same individual or to other individual of same species where it induce specific response is called a hormone.
Fungi is most abundantly found organism in earth, almost all parts of earth we found earth, here we represent some characteristic with their uses and disadvantages .
Fungi are eukaryotic organisms that include microorganisms such as yeasts, moulds and mushrooms. These organisms are classified under kingdom fungi.
Fungus comes from the Greek word mykes “Mushrooms”
They are Eukaryotic organism that digests food externally and absorbs nutrients directly through its cell walls. Consist of about 100,000 spp.
Biological Classification
This ppt shows the details of biological classification. it gives a brief idea about the five kingdom classification with a detailed description of kingdoms monera, protista and fungi. a detailed description of viruses, viroids, prions and lichens have also been given....
For more details visit my youtube channel: (VIHIRA ACADEMY)
https://www.youtube.com/channel/UCxo06Nj-QWo_7SNvMyDnJCQ?view_as=subscriber
The kingdom Fungi includes a vast variety of organisms such as mushrooms, yeast, and mold, made up of feathery filaments called hyphae (collectively called mycelium). Fungi are multicellular and eukaryotic. They are also heterotrophs, and gain nutrition through absorption.
Are your wondering why you urinate above the normal 7-8 times in a 24 hours cycle. Urinary frequency can be defined as needing to urinate more than 7-8 times in a period of 24 hours while drinking about 2 liters of fluid. This can disrupt your normal routine, interrupt your sleep cycle, and it can be a sign of an underlying medical condition
Biology is the branch of science which deals with the study of living organism and their life processes. It covers all aspect of the study of living creatures like growth, structure, occurrence, classification, ecology, economics importance, external form, organization, internal structure, nutrition among others
Medicine as a career has a variety of specializations; but focusing on the branches with more demand that can help you as a future doctor to define your specialty is cardinal
Angina is a type of chest pain caused by reduced blood flow to the heart. It is a symptom of coronary artery disease. Angina, which may also be called angina pectoris, is often described as squeezing, pressure, heaviness, tightness or pain in your chest. Some people with angina symptoms describe angina as feeling like a vise is squeezing their chest or feeling like a heavy weight has been placed on their chest. Angina may be a new pain that needs evaluation by a doctor, or recurring pain that goes away with treatment
this presentation provides a genuine knowledge on cholesterol positive and negative impact on the proper functioning of your health. Take a look at it. Please Don't forget to leave your comment at the comment session for improvement.
Bryophytes comes from the Greek word “Bryo” meaning “Moss” and “Phyte” meaning “Plant” They are eukaryotic plant-like organism without vascular system. They consist of about 20,000 plant species.
Gymnosperm is from the Greek “gymnos” naked, and “sperma” seeds. They are groups of vascular plants that reproduce by means of an exposed seeds or ovules. They are phanerogams according to A. W. Eichler.
Phylum lycophyta (Club mosses, Spike mosses & Quillworts)Fasama H. Kollie
Lycophytes are believed to be the oldest living lineage of vascular plants. Lycophytes , also known as ‘ferns allies’, are a clade of vascular plants similar to ferns, but have unique leaves called microphylls. Lycophytes contain three orders; lycopodium (club mosses), selaginella (spike mosses) and isoetales (Quillworts)
Phylum Phaeophyta, Rhodophyta & Chlorophyta - Multicellular aglaeFasama H. Kollie
These are the multicellular algae of the kingdom Protista. Phaeophyta are group of multicellular, eukaryotic organisms that belong to the class phaeophyceae in the division chromophyta.
Phylum Cryptophyta describes tiny, motile, unicellular organisms with two slightly unequal flagella bearing lateral hairs. Prymnesiophyta are group of autotrophic, planktonic, binucleated flagellates characterized by the presence of a haptonema
Phylum Bacillariophyta, Xanthophyta & Chrysophyta Fasama H. Kollie
Bacillariophyta is a phylum of the kingdom Protista, consisting of mostly unicellular aquatic algae commonly referred to as Diatoms.
Xanthophytes are the yellow-green algae whereas Chrysophytes are the golden-brown algae.
Small phylum of the Kingdom protista, consisting of mostly unicellular aquatic algae. Many of these organisms exhibit characteristics similar to both plants and animals. organisms of this phylum are also called Euglenozoa, euglenoids, euglenophytes among others.
This is a comprehensive presentation. It will guide you in identifying Euglena.
Organisms with hidden form of reproduction or reproductive structure. This presentation provide a comprehensive knowledge on such organisms thereby aiding to clearly distinguish them from the Phanerogams, which are organisms with and identifiable form of reproduction or their reproductive structures are identifiable.
This presentation provides a clear understanding of the physiology of the circulatory system. It focus lies on the division and component of the circulatory system, the three major function of the circulatory system, blood composition, structure of the heart, blood circulation; pulmonary and systemic circuit, valves of the heart, the pathway of blood flow through the heart, the cardiac cycle, pressure changes during the cardiac cycle; systole and diastole, cardiac output, heart sounds among others.
This presentation was designed by Fasama H. Kollie and presented by Benetta N. Kekulah, Cordelia Capehart and Abraham Peters.
Unicellular aquatic Eukaryota organism that do photosynthesize. Plant-like protist. This presentation provides a generalize idea of protist focusing specifically on some characteristics of protist as well as their division.
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
2. Lesson Outline
• Overview of the phylum
Chytridiomycota
• Habitat and Habit, Morphology,
Mode of nutrition, Movement
• Reproduction in Chytridiomycota
• Economic and Ecological
Importance
• Positive and Negative Impart
• Overview of the Phylum
Zygomycota
• Reproduction in Zygomycota
• Life cycle of Rhizopus stolonifer
• Bread mold and types
• Ecological and Economic
importance
• Conclusion
3. Lesson Objectives
• Upon completion of this topic, students will be able to;
1. Define the term Chytrids and Zygote fungi
2. Describe the phylum chytridiomycota and Zygomycota
3. Discuss mode of reproduction in zygote fungi
4. Discuss the positive and negative impart of these organisms
4. Kingdom: Fungi
Division: Chytridiomycota – “Chytrids”
• A division of zoosporic organisms in
the kingdom Fungi
• Informally known as Chytrids
• 700 species
• Produce spores and gametes
• Only fungi with flagellated cells at
any stage during their life cycle
5. General Characteristics: Habitat & Habit
• Usually live as water molds on dead
leaves, branches, or animal in fresh
water
• Several species are parasitic to plant
and animals
• Eg: Black wart, a serious disease of
potatoes
6. Phylum Chytridiomycota: Morphology
• Most consist of spherical cells
or coenocytic hyphae
• Some hyphae form robot-like
structures called rhizoids
• These fungi are uniflagellated
cells (Protist characteristic)
Most Chytrids are structurally fairly simple
7. General Characteristics:
Mode of Nutriton
• Chytridiomycota feed on both living and decaying organisms
• Most are parasites of algae and animals or live on organic debris as
saprobes
• They are heterotrophic organism / Saphrotrophs
• Absorptive nutrition
• A way of obtaining energy and nutrients in which digestive enzymes are
secreted into a substrate, then smaller, easily assimilated molecules are
absorbed through the cell membrane
8. General Characteristics:
Movement
• Chytrids have a posterior whiplash flagellum
• Chytridiomycota reproduce with zoospores that are capable of active
movement through aqueous phases
• They are unique among all fungi in having motile stages in their life
cycles
9. Reproduction In Chytridiomycetes
• The life cycle of Allomyces features an alternation of isomorphic
generation
• In Allomyces, the diploid sporophyte can reproduce asexually by releasing
diploid zoospores
• It initiates the sexual cycle through the release of this spore
• The sexual cycle germinate and develop into gametophytes
10. Economic and Ecological Importance:
Positive Impact
• Members of Blastocladiales and Monoblepharidales generally appear to
function as decomposers of detritus in the aquatic and soil ecosystems
• Species of Coelomomyces (C. anophelescia) are endoparasites on mosquito
larvae and can be utilized for the biological control of the mosquito
(Anopheles spp.), which is an important vector for the spread of malaria in
human beings.
• Known for ability to decompose toughest biomaterials like chitin, keratin,
and pollen also help many herbivores digest cellulose.
11. Economic and Ecological Importance:
Negative Impact
• Many Chytrids indirectly harm humans and animals. They parasitize
and destroy the phytoplanktonic forms of algae that form an
important link in food chain of aquatic ecosystems
• Why is Chytrids fungus a concern to the world?
• Populations of amphibians are declining worldwide, and chytrid
fungus is considered one of the primary threats
• The fungus causes chytridiomycosis, a disease deadly to amphibians
12. Chytridiomycosis:
• An infectious disease in
amphihbians
• Caused by the Chytrid fungi
Batrachochytrium dendrobatidis
• A nonhyphal zoosporic fungus
• This has been linked to dramatic
population declines or even
extinctions of amphibian species
13. Chytridiomycosis Cont’d…
• Batrachochytrium dendrobatidis attacks amphibians by infecting their outer skin
layers.
• Frog uses it’s outer skin to hydrate, control their body temperatures, regulate
minerals and nutrients, and sometimes even breathe.
• The infection makes the skin thicker and less permeable, resulting in electrolyte
imbalances, loss of muscle control, and heart failure.
• Frogs may also become lethargic and have redden or sloughed off skin
• Several treatments have shown promise but there is currently no cure. One key may
lie in figuring out why some species are more susceptible than others - some species
are resistant whiles other experience 85-100% fatality.
15. • More than 1,000 species
• Organisms are referred to as “Zygote fungi”
• Most form coenocytic hyphae
• Zygomycota are defined and distinguished from all other fungi by
sexual reproduction via zygospores following gametangial fusion and
asexual reproduction by uni-to-multispored sporangia
Kingdom: Fungi
Division: Zygomycota – “Zygote Fungi”
16. General Characteristics: Habitat & Habit
• Mostly terrestrial in habitat
• Zygomycetes Live on dead plants and animals or other organic
matter, such as dung
• Eg: Coprophilous
• Some live as endosymbionts in the digestive tract of arthropods
• Others are fungal components of endomycorrhizae
• Zygomycota, like all true fungi, produce cell walls containing chitin
17. General Characteristics: Habitat & Habit
• Zygomycetes cause many types of
soft rot in fruits and a few parasitic
diseases in animals
• Rhizopus stolonifer (black bread
mold)
• Haploid mycelia of Rhizopus grow
rapidly through the food, absorbing
nutrients
19. General Characteristics: Form & Function
• They grow primarily as mycelia, or
filaments of long cells called
hyphae
• Most form coenocytic hyphae
• The unique character of the
Zygomycota is the zygospore
20. General Characteristics: Mode of Nutrition
• Like other Fungi, Zygomycota are heterotrophic and typically grow inside
their food, dissolving the substrate with extracellular enzymes, and taking
up nutrients by absorption rather than by phagocytosis, as observed in
many protists
21. Reproduction In Zygomycetes
• Zygomycota are thought to have a zygotic or haplontic life cycle
• Rhizopus is capable of both sexual and asexual reproduction both involve spores
• In stable environment, asexual reproduction predominates
• The mycelium extends specialized hyphae called stolon, across the surface of the
food
• Wherever the stolon touch the surface, rhizoids grow into the food
• Rhizoids anchor upright hyphae called sporangiophore
• This forms black sporangium at its tip
25. Bread Mold: How To Identify Types Of Mold
• Color
• Size/shape
• Texture
26. What are The Different Types of Bread Molds
1. Rhizopus stolonifer (Black bread
mold)
This mold looks fuzzy on bread,
and when it first grows, it tends to
appear light in color. Overtime the
mold spot becomes black in color
27. Different Types of Bread Molds Cont’d…
2. Penicillium sp.
Penicillium sp. appears as fuzzy
patches that are lightly colored,
tending to be white, gray or blue.
The pencillium molds, if left to
grow, can begin to produce
mycotoxins
28. Ecological and Economic Importance
• Zygomycota are arguably the most ecologically diverse group of fungi. Zygomycota are
terrestrial organisms. They live close to plants, usually in soil and on decaying plant
matter. Because they decompose soil, plant matter, and dung, they have a major role in
the carbon cycle
• They form mutualistic symbiotic relationships with plants. In addition, they form
commensalist relationships with arthropods, inhabiting the gut of the organism and
feeding on unused nutrients
• Zygomycota are also pathogens for animals, amoeba, plants, and other fungi
• While Zygomycota are largely known to humans for the negative economic impact they
have on fruit, they also have some practical use. For example, certain species are used
in Asian food fermentations
• In addition, people have used their pathogenic powers to control insect pests.
29. In Summary:
• Division chytridiomycota constitutes a phylum of zoosporic organisms in the
kingdom fungi
• Commonly called Chytrids
• Only fungi with flagellated cells at any stage during their life cycle
• Most consist of coenocytic hyphae
• Division zygomycota constitutes group of organism commonly referred to as
zygote fungi
• Most form coenocytic hyphae
• Distinguished from all other fungi by sexual reproduction via zygospores
following gametangia fusion and asexual reproduction
30. Reference
• Nabors, Murray W., Introduction To Botany. Copyright 2004 Pearson Education, Inc., publishing as
Benjamin Cummings, 1301 Sansome St., San Francisco, CA 94111. www.aw-bc.com
• Webster, J., & Weber, R. W. S. (2007). Introduction to fungi 3rd Ed.
• Encyclopedia Britannica https://www.britannica.com/science/Chytridiomycota
• https://en.wikipedia.org/wiki/Chytridiomycota
• http://tolweb.org/Zygomycota
• http://www.biologydiscussion.com/fungi/chytridiomycetes-features-and-significance-
phycomycotina/54817
• https://sciencetrends.com/bread-mold-how-to-identify-types-of-mold/
• https://microbewiki.kenyon.edu/index.php/Zygomycota
• http://www.amphibianark.org/the-crisis/chytrid-fungus/
• https://courses.lumenlearning.com/boundless-biology/chapter/sexual-reproduction/
31. “Craving to become a successful person
without God is like wanting to erect a
skyscraper without a foundation”
Dr. Moses Ziah, II
THE END
Thanks for your time
Editor's Notes
Chytridiomycota, a phylum of kingdom Fungi distinguished by having zoospores (motile cells) with a single, posterior, whiplash flagellum
They are informally know as “Chytrids”
This term referred just to organisms in the class Chytridiomycetes
Interesting there are other classes;
Class Monoblepharidiomycetes
Class Hyaloraphidiomycetes
Over 750 Chytrid species
Distributed among ten (10) orders
The name is derived from the Greek chytridium, meaning "little pot“
Little pot describing the structure containing unreleased zoospores
Chytrids are one of the early diverging fungal lineages, and their membership in kingdom Fungi is demonstrated with;
chitin cell walls
Posterior whiplash flagellum
Absorptive nutrition
Glycogen as energy storage compound
Saprophytic/parasitic
What is their Modus operandi?
Species are microscopic in size, and most are found in freshwater or wet soils
Obviously these sperm-like cells require water and it is thus not surprising that chytrids live in perminantly or temporarily aquatic habitats.
Chytrids mainly infect algae and other eukaryotic and prokaryotic microbes
Affect plants and animals
Few species in the order Chytridiales cause plant disease
Synchytrim endobioticum
Synchytrium endobioticum is a fungus that causes potato wart disease, or black scab. This disease affects the shapes of the tubers of potatoes. The fungus cause a de-shapes in potatoes, thus, become tasteless loosing its flavor and therefore unfit for human consumption. You tubers get deformed due to infection and have to be thrown away
one species, Batrachochytrium dendrobatidis, has been shown to cause disease in frogs and amphibians – Chytridiomycosis
Amphibians
Frog, salamander, toads, caecilian,
What makes Chytrids unique among fungi?
The Chytridiomycota, often called chytrids, are unique among all fungi in having motile stages in their life cycles; no other fungi have this trait. These motile stages take the form of zoospores, single cells with a single posterior (at the rear) flagellum
Extracellular enzymes or Exoenzymes are synthesized inside the cell and then secreted outside the cell, where their function is to break down complex macromolecules into smaller units to be taken up by the cell for growth and assimilation
These enzymes degrade complex organic matter such as cellulose and hemicellulose into simple sugars that enzyme-producing organisms use as a source of carbon, energy, and nutrients.
Grouped as hydrolases, lyases, oxidoreductases and transferases
These enzymes target macromolecules such as carbohydrate (cellulases), lignin (oxidases), organic phosphate (phosphatases), amino sugar polymers (chitenases) and proteins (proteases)
Some do live in the soil
Sirenin comes from the Sirens, mythological Greek figures who called to sailors in an attempt to lure their ships onto the rocks so they could capture the ship’s goods.
Alternation of generations is rare in fungi, but it appears in all plant phyla and in many algae
What features of Chytrids makes them germane to the lives of other organisms, similar organisms or the environment in which they dwell.
Decomposer aid in the reduction of waster/organic matter/ or rubbish in the environment and are very important in any ecosystem
They decompose/ breakdown substance with different organism molecules. Eg: chitin, keratin, cellulose among others
Coelomomyces is a genus of fungi in the family Coelomomycetaceae. Species in the genus can be used as agents for the biological control of mosquitoes
These species affect the population of mosquitoes species and have been studied extensively
Entomopathogenic fungus
fungus that can act as a parasite of insects and kills or seriously disables them.
For the Record:
Of the 56.9 million deaths worldwide in 2016, more than half (54%) were due to the top 10 causes. Ischaemic heart disease and stroke are the world’s biggest killers, accounting for a combined 15.2 million deaths in 2016. These diseases have remained the leading causes of death globally in the last 15 years.
The leading causes of death in the world - can they be cured?
Ischaemic heart disease (coronary artery disease)
Stroke. ...
Lower respiratory infections. ...
Chronic obstructive pulmonary disease (COPD) ...
Lung cancer, trachea and bronchus. ...
Diabetes. ...
Alzheimer's disease. ...
Diarrhoeal diseases. .
Afirca
738 million people living in the African Region of the World Health Organization.
The World Health Organization’s most recent data on global deaths has good news for the African continent, including fewer people dying of HIV/AIDS and malaria.
The new death statistics researched by African fact-checking organization, Africa Check, indicated that lifestyle diseases have taken over as the leading causes of death on the continent.
Lower respiratory tract infections
The most common diseases under this category is bronchitis or pneumonia which is responsible for 16% of global deaths of children younger than five.
2. HIV/AIDS
3. Diarrhoeal
4. Stroke
5. Ischaemic heart disease [Heart attack] – narrowing of the arteries of the heart due to the buildup of plaques causing less oxygen to reach portions of the heart. When fully blocked, damage is caused to the heart and death occurs
Malaria [Africa]
Malaria is a life-threatening disease caused by parasites that are transmitted to people through the bites of infected female Anopheles mosquitoes. It is preventable and curable. There are 5 parasite species that cause malaria in humans, and 2 of these species – P. falciparum and P. vivax – pose the greatest threat.
In 2017, P. falciparum accounted for 99.7% of estimated malaria cases in the WHO African Region
In 2017, there were an estimated 219 million cases of malaria in 87 countries.
The estimated number of malaria deaths stood at 435 000 in 2017.
Batrachochytrium dendrobatidis – Chytridiomycosis
Batrachochytrium salamandrivorans
What is chytridiomycosis? How does Bd kill amphibians? Chytridiomycosis (“Mycosis” = disease caused by a fungus) is the disease that occurs when an amphibian is infected with large numbers of the Bd fungus. Infection with Bd occurs inside the cells of the outer skin layers that contain large amounts of a protein called “keratin”. Keratin is the material that makes the outside of the skin tough and resistant to injury and is also what hair, feathers and claws are made of. With chytridiomycosis, the skin becomes very thick due to a microscopic change in the skin that pathologists call “hyperplasia and hyperkeratosis”. These changes in the skin are deadly to amphibians because— unlike most other animals— amphibians “drink” water and absorb important salts (electrolytes) like sodium and potassium through the skin and not through the mouth. Abnormal electrolyte levels as the result of Bd-damaged skin cause the heart to stop beating and the death of the animal (Voyles et al., 2009). Other amphibians like the lungless salamanders, use the skin to breathe and skin changes due to chytridiomycosis could interfere with this function causing suffocation.
Batrachochytrium dendrobatidis attacks amphibians by infecting their outer skin layers.
Frog uses it’s outer skin to hydrate, control their body temperatures, regulate minerals and nutrients, and sometimes even breathe [cutaneous respiration] Cutaneous respiration is a form of respiration in which gas exchange occurs across the skin or outer integument of an organism rather than gills or lungs. Eg: Earthworms and Amphibians. Frog breaths through its skin. It has a permeable skin, which needs to remain moist and have tiny blood vessels or capillaries that lie close to their skin surface. These tiny vessels transports oxygen to their various tissues and carry CO2 to the outer skin layer
The infection makes the skin thicker and less permeable, resulting in electrolyte imbalances, loss of muscle control, and heart failure.
Frogs may also become lethargic and have redden or sloughed off skin
Several treatments have shown promise but there is currently no cure. One key may lie in figuring out why some species are more susceptible than others - some species are resistant whiles other experience 85-100% fatality.
Zygomycota are defined and distinguished from all other fungi by sexual reproduction via zygospores following gametangial fusion
The phylum comprises at least seven phylogenetically diverse orders [7 orders]
Zygomycota are arguably the most ecologically diverse group of fungi, functioning as saprophytes on substrates such as fruit, soil, and dung (Mucorales), as harmless inhabitants of arthropod guts (Harpellales), as plant mutualists forming ectomycorrhizae (Endogonales), and as pathogens of animals, plants, amoebae, and especially other fungi
They are mostly terrestrial in habitat, living in soil or on decaying plant or animal material
Some are parasites of plants, insects, and small animals, whi le others form symbiotic relationships with plants
Coprophilous funig [Dung-loving fugi]
Are a type of saprobic fungi that grow on animal dung
The fungi then flourish in the feces, before releasing their spores to the surrounding area.
Unlike the so-called 'higher fungi' comprising the Ascomycota and Basidiomycota which produce regularly septate mycelia, most Zygomycota form hyphae which are generally coenocytic because they lack cross walls or septa.
There are three main categories of life cycles in eukaryotic organisms: diploid-dominant, haploid-dominant, and alternation of generations.
1. Diploid-Dominant Life Cycle.
In this type of life cycle the multicellular diploid stage is the most obvious life stage
The haploid stage is the production of haploid cells which are gametes
It occurs with most animals, including humans
2. Haploid-Dominant Life Cycle.
In this life cycle the multicellular haploid stage is the most obvious life stage
Most fungi and algae employ a life cycle in which the “body” of the organisms, the ecologically important part of the life cycle, is haploid
This is associated with positive and negative mating types
The haploid multicellular stage produces specialized haploid cells by mitosis that fuse to form a diploid zygote. The zygote undergoes meiosis to produce haploid spores. Each spore gives rise to a multicellular haploid organism by mitosis.
3. Alternation of Generations.
Employ by some algae and all plants
Blend of the haploid-dominant and diploid-dominant extremes
Species here have both haploid and diploid multicellular organisms as part of their life cycle
Haploid multicellular plants are called gametophytes [n]
Diploid multicellular plants are called sporophyte [2n]
Stable Environment [Asexual reproduction]
Moist
Presence of light
Available food / organic matter
Absent of mating type
Unstable Environment [Sexual reproduction]
Dry environment
Dark, absence of light
Absent of food/organic matter
Present of opposite mating types
What makes an environment stable?
Sporangia are what you see when you spot the mold growing on a slice of bread.
By the time sporangia form, the lightly pigmented mycelium has grown for at least several days and has thoroughly penetrates the bread
Asexual reproduction [Stable env.]
In a stable environment asexual reproduction predominates
Mycelium extends specialize hyphae, called stolon, across the surface of the food
Wherever the stolon touches the surface, rhizods grow into the food
Rhizoids anchor upright hyphae called sporangiophhores, each forming sporangium at its tip
Sporangium is what you see when you spot the mold growing on the bread
This shows that the mycelium has thoroughly penetrated the bread
When the sporangium breaks apart, spores are released and when they fall in a suitable environment they will germinate and begin the asexual life cycle again
Sexual Life cycle [Unstable Env.]
Variety of conditions such as; a dry environment, shortage of food, even the mere presence of opposite mating types, can trigger the sexual life cycle
Mycelium of + and – mating types releases chemicals that cause hyphae of opposite mating types to grow towards each other
On contact, each hyphae forms a gametangium consisting of a single cell with multiple nuclei
Fusion of the gametangia (plasmogamy) produces a zygosporangium which contain nuclei of both mating types
Zygosporangium develops into a thick, resistant wall containing single zygospores
Kaygogamy [Nuclei fusion] occurs inside the zygospores, the diploid nuclei upon fusion undergo MEIOSIS, forming haploid nuclei
Zygospore upon germination produces a sporangiophore with a sporangium at its tip
The haploid nuclei then undergo MITOSIS and move into the sporangium where they become spores
Rapture of the sporangium releases the spores, which may germinates and produce new mycelia
Molds are typically identified based on their spores and the structure of the parts of the mold that produces the spores
Since the structure of the spore-forming component of the mold can really only be seen using a microscope, the focus here will be on the spores themselves for identifying the type of bread mold
The easiest way to identify bread mold at home is based on the general appearance of the mold
This mold looks fuzzy on bread, and when it first grows, it tends to appear light in color (either blue, green, or white)
Overtime, as spores are produced at the ends of aerial hyphae, the mold spot becomes black in color
R. Stolonifer grows in circular patches, and will quickly expand over the surface of the bread
Penicillium sp. are the other most common types of mold found on breads.
It appears as fuzzy patches that are lightly colored, tending to be white, gray, or blue
Pencillium sp. can grow in colder temperatures, and so can be found on bread stored in the refrigerator.
The Pencillium molds, if left to grow, can begin to produce mycotoxins which can ultimately prove to be fatal if consumed regularly or in large quantities.
Mycotoxins [Mycotoxicosis]
Are toxic compounds that are naturally produced by certain types of moulds (fungi)
Moulds that can produce mycotoxins grow on numerous foodstuffs such as cereals, dried fruits, nuts and spices
There are five mycotoxins, or groups of mycotoxins, that occur quite often in food: deoxynivalenol/nivalenol; zearalenone; ochratoxin; fumonisins; and aflatoxins.
Effect:
Affect the nervous system of horses
May cause cancer in rodents
Trichothecene – can be absorbe easily in food
Affect the gastrointestinal tract, skin, kidney, liver, and immune and hematopoietic progenitor cellular system
The adverse effects on human heath can be both acute and chronic. It can provoke problems such as liver cancer, reduction of immunity, alterations in protein metabolism, gangrene, convulsions, respiratory problems, among others
3. Cladosporium sp.
4. Asperqillus sp.
Help to decay organic matter thus playing a major role in the carbon cycle
Conversely, some species have a negative economic impact on human affairs by causing storage rots of fruits (particularly strawberries by Rhizopus stolonifer ), as agents of plant disease (e.g., Choanephora cucurbitarum flower rot of curcurbits), while other species can cause life-threatening opportunistic infections of diabetic, immuno-suppressed, and immuno-compromised patients