Lichens growing on tree trunks pose no threat to trees' health. Lichens are a symbiotic relationship between fungi and algae or cyanobacteria, where the fungus surrounds the algae or bacteria. Their presence indicates relatively clean air as they do not grow in polluted areas. There is no need to remove lichens from trees as doing so could damage the bark.
this presentation is about lichen. in these slides we will study about lichen which is a symbiotic association between algae and fungi. it consist of the following studies introduction to lichens, its History, Distribution, External Structure of Thallus (Shapes of Lichens), Internal Structure of Thallus, Classification, Reproduction, Harmful Effects, Economic Importance etc.
A Contribution to the Vesicular Arbuscular Mycorrhizal Fungal status on twent...iosrjce
IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT) multidisciplinary peer-reviewed Journal with reputable academics and experts as board member. IOSR-JESTFT is designed for the prompt publication of peer-reviewed articles in all areas of subject. The journal articles will be accessed freely online.
Ecto and endomycorrhizae and their significanceRitaSomPaul
A part of Botany (Hons) syllabus in Mycopathology illustrates the basic differnces in ectomycorrhizae and endomycorrhizae as well as their significance
this presentation is about lichen. in these slides we will study about lichen which is a symbiotic association between algae and fungi. it consist of the following studies introduction to lichens, its History, Distribution, External Structure of Thallus (Shapes of Lichens), Internal Structure of Thallus, Classification, Reproduction, Harmful Effects, Economic Importance etc.
A Contribution to the Vesicular Arbuscular Mycorrhizal Fungal status on twent...iosrjce
IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT) multidisciplinary peer-reviewed Journal with reputable academics and experts as board member. IOSR-JESTFT is designed for the prompt publication of peer-reviewed articles in all areas of subject. The journal articles will be accessed freely online.
Ecto and endomycorrhizae and their significanceRitaSomPaul
A part of Botany (Hons) syllabus in Mycopathology illustrates the basic differnces in ectomycorrhizae and endomycorrhizae as well as their significance
Presentation designed for a 3-hr teaching session for master gardeners in Oregon. The presentation is for beginners and covers many botanical subjects at that level. It is hoped that learners will be intrigued enough to discover more information on their own
The Basidiomycota are those organisms that produce sexual spores (basidiospores) on basidia often these are borne on distinctive basidiocarps or basidioma. The phylum typically has an extended dikaryophase in which the distribution of two nuclei to the daughter cells is facilitated by the formation of a clamp connection, which is similar to the crozier of the Ascomycota.
This is a very detailed slide on the topic 'Fungi'. I hope this slide is beneficial to everyone. Also don't forget to 'Like' if u like this slide! Thank you!
Which is a common trait among all land plantsVascular tissues tra.pdfneetuarya13
Which is a common trait among all land plants?
Vascular tissues transport water and nutrients, and provide support
Seeds facilitate survival and dispersal of the species
Flowers facilitate cross-pollination
The embryo is protected within maternal tissues
The haploid phase of the life cycle is the dominant phase
Flowers facilitate cross-pollination
The embryo is protected within maternal tissues
The haploid phase of the life cycle is the dominant phase
Solution
First we see common traits of land plants and then see listed traits in details one by one:
1. Ability to withstand desiccation. Extant land plants have a cuticle and guard cells.
2. Ability to withstand the effects of more intense radiation, particularly DNA-damaging
radiation. Extant land plants have several compounds in their vacuoles that absorb UV. Since the
vacuole of a plant occupies most of a mature cell, this helps protect the DNA in other organelles.
3. Ability to protect their spores from desiccation. Early land plants have spores that are encased
in a sporopollenin wall. Sporopollenin is a very resistant polymer, resistant to UV and almost
everything including desiccation, squashing, etc. To remove sporopollenin from spores, one boils
them in a mixture of acetic and hydrochloric acid.
4. Ability to move solutions from the ground to portions of the plant that are not in contact with
the ground, and from the photosynthetic portions of the plant to non-photosynthetic portions.
Some land plants do this better than others.
5. Ability to support themselves. Aquatic plants float; terrestrial plants cannot do so. Most
terrestrial plants have lignin in some of their conducting cells. There is some debate as to
whether this was selected for by the advantages of growing tall or the need to protect against
embolism in the conducting cells. Since both are important, it seems most realistic to accept that
both contributed to the success of plants with the ability to manufacture lignin, the tracheophytes
or vascular plants.
6. Ability to acquire the carbon dioxide required for photosynthesis from the atmosphere. This
ability is associated with stomatal cells, specialized cells that surround openings (stomates) in the
outer cell layer of land plants.
Now we see Options given one by one:
Vascular tissues transport water and nutrients, and provide support
Transport of Water and Minerals:
The xylem tissue transports water and minerals. It consists of interconnected vessels and
tracheids organized into continuous conducting tubes stretching from the roots to the leaves.
These tubes carry water and minerals to all parts of the plant.
Plants absorb water from the soil through the root and transport it to the stem, leaves and
flowers. Roots have root hairs that are unicellular, thin-walled outgrowths of the epiblema (skin
of the root).
The root hairs are in close contact with the thin film of water surrounding the soil particles.
There are mineral salts such as nitrates, chlorides, sulphates, phos.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
UiPath Test Automation using UiPath Test Suite series, part 4
Science
1. From your description and photos, the “problem” is lichens growing on the bark of your
trees. Lichens are a fungus living in a symbiotic (mutually beneficial) relationship with blue-
green bacteria. The fungus surrounds the bacteria. They often grow on tree trunks,
unfinished wooden fences, and even rocks.
Q. A number of trees in our backyard and the oak tree in our front yard
have pale green splotches all over their trunks. Can you tell me what this
is? Is it dangerous to the tree, and what can be done about it?
A. From your description and photos, the “problem” is lichens growing on the bark
of your trees. Lichens are a fungus living in a symbiotic (mutually beneficial)
relationship with blue-green bacteria. The fungus surrounds the bacteria. They
often grow on tree trunks, unfinished wooden fences, and even rocks.
Lichens growing on a tree trunk
Lichens pose no threat to your trees' health, or to you and your family. Their
presence is actually a sign that the air in your neighborhood is relatively clean -
they do not grow in areas where the air polluted. There is no reason to remove
them, and you could damage the trees' bark in the process.
Enteromorpha flexuosa is a native green
alga that exhibits invasive characteristics in areas of fresh water intrusion and high nutrient input.
Description
Long, filamentous green alga up to 15 cm tall, mostly tubular, hollow, with tube walls 1 cell
thick, axes 1-7 mm wide. Branches cylindrical throughout or with the terminal portion expanded
and bladelike, or centrally compressed with only the margins hollow. Larger tubular portions
may or may not branch; if branched, with narrow filamentous branchlets. Attached to rocky
substrate by rhizoids that grow from basal cells of the tube. Grass green.
It often grows in tufts of 6 cm long, but in areas of high nutrients and fresh water, can form long,
hairlike strands up to 20 cm long.
Structural Features
2. Thallus hollow tube, walls 1 cell thick. Cells in surface view arranged in short longitudinal rows.
Cells rounded rectangular, 10-28 µm wide, 8-30 µm long, in somewhat longitudinal and often
transverse rows; basal cells up to 50 µm long.
Habitat
Forms clusters or tufts attached to rocks in sandy areas, high intertidal to mid-intertidal. Will
often be exposed at low tide, and often found near freshwater intrusion. Epiphytic in ponds.
Distribution
Hawai‘i: Kaua‘i, O‘ahu, Maui, and Hawai‘i Island.
Mechanism of Introduction: Indigenous to Hawai‘i.
Worldwide: Worldwide distribution in both temperate and tropical waters of the Pacific and
Atlantic Ocean, Indonesia, Philippines, southern Japan, Viet Nam, and Thailand.
Ecology/Impact
Enteromorpha flexuosa is a very common high intertidal green alga found wherever there is
freshwater intrusion, such as freshwater stream or underwater spring input to the ocean. It is
often associated with coastal areas of high nutrients, including areas with residential and
industrial development.
E. flexuosa is considered an invasive and fouling species in much of the world. This is an
opportunistic species that has a very successful reproductive stage. Under the right conditions it
will release propagules daily. The motile reproductive cells actually have the ability to
photosynthesis, thus increasing their potential viability and dispersion.
Because of this high reproductive ability, E. flexuosa is markedly fecund and, therefore, an
excellent pioneer species, settling available substrates quickly. But it does not compete well with
other successional species. In studies of disturbance and settlement, E. flexuosa was found to
maintain a low percent cover in undisturbed areas but, following a disturbance, density increased
dramatically.
3. E. flexuosa is often found in communities with or near Ulva fasciata, another pioneer green alga
species. Both are fouling organisms associated with industrial pollution. Anti-fouling studies
investigating control and/or eradication of fouling species identify these two species as serious
pests in shipping and industrial areas.
What is a Mushroom?
Mushrooms are the fruiting bodies produced by some fungi. Not all fruit bodies are true
mushrooms. Puffballs and morels are edible fruit bodies that are sometimes called
"mushrooms". The function of this visible part of some fungi is to produce and disperse
the largest possible number of spores in the shortest possible time. Spores create new
individuals after being carried away on the wind and landing in a good place for growth.
True mushrooms typically look like umbrellas. They consist of a stalk topped by a flat or
cup-shaped cap. Their spores are produced on special cells called basidia, located on the
underside of the cap. The class of fungi whose spores are produced by basidia are called
Basidiomycetes.
People often ask about the difference between toadstools and mushrooms. Any mushroom
can be called a toadstool, but this word usually refers to a poisonous mushroom.
What do they look like?
Click the link to see some photographs of mushrooms with gills and mushrooms without
gills.
4. Life History of Mushrooms
While mushrooms may seem to sprout overnight, it actually
takes days or weeks for one to develop. Most of the growth
of a fungus goes unnoticed because it occurs underground.
The underground body of a fungus, called the mycelium, is
made of moist thread-like filaments called hyphae. When
growing conditions are good, little knots of hyphae called
primordia are formed. As individual primordia grow
larger, the hyphae within them organize into two parts.
One part will become a mushroom’s cap, and the other, its
stem.
When the primordium gets large enough, the stem
elongates and pushes the cap up above the ground. As the
stem elongates, the cap expands, a little like an umbrella
unfolding. In some mushrooms, the expanding cap breaks a
veil-like membrane extending from the cap to the stem,
leaving a ring. Some growing mushrooms may also break a
second membrane that covers it completely, and dried bits
of this broken veil form scales on the cap.
On the underside of the cap, the spore-producing basidia are found in
several different structures. Basidia may cover the surface of tissue-
thin hanging plates called gills, or line the inside of tubes, or cover
"teeth".
Basidia produce four spores at the end of microscopic spines called
sterigma. When the spores are ready, they are discharged a short
distance into the space between the gills or teeth, or into the center of
the tube. The spores then fall out of the cap and are carried away in
the wind. Most spores land within three feet (1 m) of the mushroom
that produced them, but they can be carried much further. If the
spore lands in a good spot, it germinates, producing the mycelium of
a new fungus individual.
The puffballs are relatives of mushrooms whose basidia and spores
are enclosed in a sac instead of covering gills, or in tubes. Coral fungi
are also mushroom relatives. They produce branched fruiting bodies
that resemble coral or broccoli.
5. Despite producing large mushroom-like fruiting bodies, morels and
false morels are not closely related to mushrooms. These fungi are
related to the cup fungi, in the class Ascomycetes. Their spores are
produced inside a special cell called the ascus, instead of on the
outside of basidia. The spores of morels and false morels are
explosively discharged into the air as a fine white cloud.
Where do Mushrooms Grow?
Mushrooms and other fungi grow almost everywhere, on every
natural material imaginable. Where you look depends on the
mushroom you are trying to find. Some fungi grow only in
association with certain trees. Others grow on large logs. Mushrooms
are also found in soil, on decomposing leaves, and in dung, mulch and
compost.
Knowing when to look is also important. Mushrooms are not formed
until temperature and moisture conditions are right for them. Some
mushrooms are produced during only one season of the year. During
mild or warm weather, they often appear 7 to 10 days after a good
rain.
Mushrooms are not plants, and require different conditions for optimal growth. Plants develop
through photosynthesis, a process that converts atmospheric carbon dioxide into carbohydrates,
especially cellulose. While sunlight provides an energy source for plants, mushrooms derive all
of their energy and growth materials from their growth medium, through biochemical
decomposition processes. This does not mean that light is an unnecessary requirement, since
some fungi use light as a signal for fruiting.[1][2]
However, all the materials for growth must
already be present in the growth medium. Mushrooms grow well at relative humidity levels of
around 95-100%, and substrate moisture levels of 50 to 75%.[1]
Instead of seeds, mushrooms reproduce asexually through spores. Spores can be contaminated
with airborne microorganisms, which will interfere with mushroom growth and prevent a healthy
crop.
Mycelium, or actively growing mushroom culture, is placed on a substrate--usually sterilized
grains such as rye or millet--and induced to grow into those grains. This is called inoculation.
Inoculated grains are referred to as spawn.Spores are another inoculation option, but are less
developed than established mycelium. Since they are also contaminated easily, they are only
manipulated in laboratory conditions with a laminar flow cabinet.
Techniques
6. All mushroom growing techniques require the correct combination of humidity, temperature,
substrate (growth medium) and inoculum (spawn or starter culture). Wild harvests, outdoor log
inoculation and indoor trays all provide these elements.
Wild harvesting
A fungus (/ˈfʌŋɡəs/; plural: fungi[3]
or funguses[4]
) is a member of a large group of eukaryotic
organisms that includes microorganisms such as yeasts and molds (British English: moulds), as
well as the more familiar mushrooms. These organisms are classified as a kingdom, Fungi,
which is separate from plants, animals, protists and bacteria. One major difference is that fungal
cells have cell walls that contain chitin, unlike the cell walls of plants and some protists, which
contain cellulose, and unlike the cell walls of bacteria. These and other differences show that the
fungi form a single group of related organisms, named the Eumycota (true fungi or Eumycetes),
that share a common ancestor (is a monophyletic group). This fungal group is distinct from the
structurally similar myxomycetes (slime molds) and oomycetes (water molds). The discipline of
biology devoted to the study of fungi is known as mycology (from the Greek μύκης, mukēs,
meaning "fungus"). Mycology has often been regarded as a branch of botany, even though it is a
separate kingdom in biological taxonomy. Genetic studies have shown that fungi are more
closely related to animals than to plants.
Abundant worldwide, most fungi are inconspicuous because of the small size of their structures,
and their cryptic lifestyles in soil, on dead matter, and as symbionts of plants, animals, or other
fungi. They may become noticeable when fruiting, either as mushrooms or molds. Fungi perform
an essential role in the decomposition of organic matter and have fundamental roles in nutrient
cycling and exchange. They have long been used as a direct source of food, such as mushrooms
and truffles, as a leavening agent for bread, and in fermentation of various food products, such as
wine, beer, and soy sauce. Since the 1940s, fungi have been used for the production of
antibiotics, and, more recently, various enzymes produced by fungi are used industrially and in
detergents. Fungi are also used as biological pesticides to control weeds, plant diseases and
insect pests. Many species produce bioactive compounds called mycotoxins, such as alkaloids
and polyketides, that are toxic to animals including humans. The fruiting structures of a few
species contain psychotropic compounds and are consumed recreationally or in traditional
spiritual ceremonies. Fungi can break down manufactured materials and buildings, and become
significant pathogens of humans and other animals. Losses of crops due to fungal diseases (e.g.
rice blast disease) or food spoilage can have a large impact on human food supplies and local
economies.
The fungus kingdom encompasses an enormous diversity of taxa with varied ecologies, life cycle
strategies, and morphologies ranging from single-celled aquatic chytrids to large mushrooms.
However, little is known of the true biodiversity of Kingdom Fungi, which has been estimated at
1.5 million to 5 million species, with about 5% of these having been formally classified. Ever
since the pioneering 18th and 19th century taxonomical works of Carl Linnaeus, Christian
Hendrik Persoon, and Elias Magnus Fries, fungi have been classified according to their
morphology (e.g., characteristics such as spore color or microscopic features) or physiology.
Advances in molecular genetics have opened the way for DNA analysis to be incorporated into
7. taxonomy, which has sometimes challenged the historical groupings based on morphology and
other traits. Phylogenetic studies published in the last decade have helped reshape the
classification of Kingdom Fungi, which is divided into one subkingdom, seven phyla, and ten
subphyla.
A group of all the fungi present in a particular area or geographic region is known as mycobiota
(plural noun, no singular), e.g. "the mycobiota of Ireland".[5]
The English word fungus is directly adopted from the Latin fungus (mushroom), used in the writings of
Horace and Pliny.[6]
This in turn is derived from the Greek word sphongos/σφογγος ("sponge"), which
refers to the macroscopic structures and morphology of mushrooms and molds;[7]
the root is also used
in other languages, such as the German Schwamm ("sponge") and Schimmel ("mold").[8]
The use of the
word mycology, which is derived from the Greek mykes/μύκης (mushroom) and logos/λόγος
(discourse),[9]
to denote the scientific study of fungi is thought to have originated in 1836 with English
naturalist Miles Joseph Berkeley's publication The English Flora of Sir James Edward Smith, Vol. 5.[7]
Fungi have a worldwide distribution, and grow in a wide range of habitats, including extreme
environments such as deserts or areas with high salt concentrations[31]
or ionizing radiation,[32]
as
well as in deep sea sediments.[33]
Some can survive the intense UV and cosmic radiation
encountered during space travel.[34]
Most grow in terrestrial environments, though several
species live partly or solely in aquatic habitats, such as the chytrid fungus Batrachochytrium
dendrobatidis, a parasite that has been responsible for a worldwide decline in amphibian
populations. This organism spends part of its life cycle as a motile zoospore, enabling it to propel
itself through water and enter its amphibian host.[35]
Other examples of aquatic fungi include
those living in hydrothermal areas of the ocean.[36]
Around 100,000 species of fungi have been formally described by taxonomists,[37]
but the global
biodiversity of the fungus kingdom is not fully understood.[38]
On the basis of observations of the
ratio of the number of fungal species to the number of plant species in selected environments, the
fungal kingdom has been estimated to contain about 1.5 million species;[39]
a recent (2011)
estimate suggests there may be over 5 million species.[40]
In mycology, species have historically
been distinguished by a variety of methods and concepts. Classification based on morphological
characteristics, such as the size and shape of spores or fruiting structures, has traditionally
dominated fungal taxonomy.[41]
Species may also be distinguished by their biochemical and
physiological characteristics, such as their ability to metabolize certain biochemicals, or their
reaction to chemical tests. The biological species concept discriminates species based on their
ability to mate. The application of molecular tools, such as DNA sequencing and phylogenetic
analysis, to study diversity has greatly enhanced the resolution and added robustness to estimates
of genetic diversity within various taxonomic groups.[42]
Mycology is a relatively new science that became systematic after the development of the microscope in
the 16th century. Although fungal spores were first observed by Giambattista della Porta in 1588, the
seminal work in the development of mycology is considered to be the publication of Pier Antonio
Micheli's 1729 work Nova plantarum genera.[235]
Micheli not only observed spores, but showed that
under the proper conditions, they could be induced into growing into the same species of fungi from
8. which they originated.[236]
Extending the use of the binomial system of nomenclature introduced by Carl
Linnaeus in his Species plantarum (1753), the Dutch Christian Hendrik Persoon (1761–1836) established
the first classification of mushrooms with such skill so as to be considered a founder of modern
mycology. Later, Elias Magnus Fries (1794–1878) further elaborated the classification of fungi, using
spore color and various microscopic characteristics, methods still used by taxonomists today. Other
notable early contributors to mycology in the 17th–19th and early 20th centuries include Miles Joseph
Berkeley, August Carl Joseph Corda, Anton de Bary, the brothers Louis René and Charles Tulasne, Arthur
H. R. Buller, Curtis G. Lloyd, and Pier Andrea Saccardo. The 20th century has seen a modernization of
mycology that has come from advances in biochemistry, genetics, molecular biology, and biotechnology.
The use of DNA sequencing technologies and phylogenetic analysis has provided new insights into fungal
relationships and biodiversity, and has challenged traditional morphology-based groupings in fungal
taxonomy.[237]
Mycology
Mycology is the branch of biology concerned with the systematic study of fungi, including their
genetic and biochemical properties, their taxonomy, and their use to humans as a source of
medicine, food, and psychotropic substances consumed for religious purposes, as well as their
dangers, such as poisoning or infection. The field of phytopathology, the study of plant diseases,
is closely related because many plant pathogens are fungi.[232]
In 1729, Pier A. Micheli first published descriptions of fungi.
The use of fungi by humans dates back to prehistory; Ötzi the Iceman, a well-preserved mummy
of a 5,300-year-old Neolithic man found frozen in the Austrian Alps, carried two species of
polypore mushrooms that may have been used as tinder (Fomes fomentarius), or for medicinal
purposes (Piptoporus betulinus).[233]
Ancient peoples have used fungi as food sources–often
unknowingly–for millennia, in the preparation of leavened bread and fermented juices. Some of
9. the oldest written records contain references to the destruction of crops that were probably
caused by pathogenic fungi.[234]
Mycotoxins
Ergotamine, a major mycotoxin produced by Claviceps species, which if ingested can cause
gangrene, convulsions, and hallucinations
Many fungi produce biologically active compounds, several of which are toxic to animals or
plants and are therefore called mycotoxins. Of particular relevance to humans are mycotoxins
produced by molds causing food spoilage, and poisonous mushrooms (see above). Particularly
infamous are the lethal amatoxins in some Amanita mushrooms, and ergot alkaloids, which have
a long history of causing serious epidemics of ergotism (St Anthony's Fire) in people consuming
rye or related cereals contaminated with sclerotia of the ergot fungus, Claviceps purpurea.[228]
Other notable mycotoxins include the aflatoxins, which are insidious liver toxins and highly
carcinogenic metabolites produced by certain Aspergillus species often growing in or on grains
and nuts consumed by humans, ochratoxins, patulin, and trichothecenes (e.g., T-2 mycotoxin)
and fumonisins, which have significant impact on human food supplies or animal livestock.[229]
Mycotoxins are secondary metabolites (or natural products), and research has established the
existence of biochemical pathways solely for the purpose of producing mycotoxins and other
natural products in fungi.[28]
Mycotoxins may provide fitness benefits in terms of physiological
adaptation, competition with other microbes and fungi, and protection from consumption
(fungivory).[230][231]
Others
Fungi are used extensively to produce industrial chemicals like citric, gluconic, lactic, and malic
acids,[222]
and industrial enzymes, such as lipases used in biological detergents,[223]
cellulases
used in making cellulosic ethanol[224]
and stonewashed jeans,[225]
and amylases,[226]
invertases,
proteases and xylanases.[227]
Several species, most notably Psilocybin mushrooms (colloquially
10. known as magic mushrooms), are ingested for their psychedelic properties, both recreationally
and religiously.
With algae and cyanobacteria
The lichen Lobaria pulmonaria, a symbiosis of fungal, algal, and cyanobacterial species
Lichens are formed by a symbiotic relationship between algae or cyanobacteria (referred to in
lichen terminology as "photobionts") and fungi (mostly various species of ascomycetes and a
few basidiomycetes), in which individual photobiont cells are embedded in a tissue formed by
the fungus.[147]
Lichens occur in every ecosystem on all continents, play a key role in soil
formation and the initiation of biological succession,[148]
and are the dominating life forms in
extreme environments, including polar, alpine, and semiarid desert regions.[149]
They are able to
grow on inhospitable surfaces, including bare soil, rocks, tree bark, wood, shells, barnacles and
leaves.[150]
As in mycorrhizas, the photobiont provides sugars and other carbohydrates via
photosynthesis, while the fungus provides minerals and water. The functions of both symbiotic
organisms are so closely intertwined that they function almost as a single organism; in most
cases the resulting organism differs greatly from the individual components. Lichenization is a
common mode of nutrition; around 20% of fungi—between 17,500 and 20,000 described
species—are lichenized.[151]
Characteristics common to most lichens include obtaining organic
carbon by photosynthesis, slow growth, small size, long life, long-lasting (seasonal) vegetative
reproductive structures, mineral nutrition obtained largely from airborne sources, and greater
tolerance of desiccation than most other photosynthetic organisms in the same habitat.[152]
Taxonomic groups
See also: List of fungal orders
The major phyla (sometimes called divisions) of fungi have been classified mainly on the basis
of characteristics of their sexual reproductive structures. Currently, seven phyla are proposed:
Microsporidia, Chytridiomycota, Blastocladiomycota, Neocallimastigomycota, Glomeromycota,
Ascomycota, and Basidiomycota.[42]
11. Arbuscular mycorrhiza seen under microscope. Flax root cortical cells containing paired arbuscules.
Phylogenetic analysis has demonstrated that the Microsporidia, unicellular parasites of animals
and protists, are fairly recent and highly derived endobiotic fungi (living within the tissue of
another species).[96][119]
One 2006 study concludes that the Microsporidia are a sister group to the
true fungi; that is, they are each other's closest evolutionary relative.[120]
Hibbett and colleagues
suggest that this analysis does not clash with their classification of the Fungi, and although the
Microsporidia are elevated to phylum status, it is acknowledged that further analysis is required
to clarify evolutionary relationships within this group.[42]
The Chytridiomycota are commonly known as chytrids. These fungi are distributed worldwide.
Chytrids produce zoospores that are capable of active movement through aqueous phases with a
single flagellum, leading early taxonomists to classify them as protists. Molecular phylogenies,
inferred from rRNA sequences in ribosomes, suggest that the Chytrids are a basal group
divergent from the other fungal phyla, consisting of four major clades with suggestive evidence
for paraphyly or possibly polyphyly.[121]
The Blastocladiomycota were previously considered a taxonomic clade within the
Chytridiomycota. Recent molecular data and ultrastructural characteristics, however, place the
Blastocladiomycota as a sister clade to the Zygomycota, Glomeromycota, and Dikarya
(Ascomycota and Basidiomycota). The blastocladiomycetes are saprotrophs, feeding on
decomposing organic matter, and they are parasites of all eukaryotic groups. Unlike their close
relatives, the chytrids, most of which exhibit zygotic meiosis, the blastocladiomycetes undergo
sporic meiosis.[96]
The Neocallimastigomycota were earlier placed in the phylum Chytridomycota. Members of this
small phylum are anaerobic organisms, living in the digestive system of larger herbivorous
mammals and possibly in other terrestrial and aquatic environments. They lack mitochondria but
contain hydrogenosomes of mitochondrial origin. As the related chrytrids,
neocallimastigomycetes form zoospores that are posteriorly uniflagellate or polyflagellate.[42]
Members of the Glomeromycota form arbuscular mycorrhizae, a form of symbiosis wherein
fungal hyphae invade plant root cells and both species benefit from the resulting increased
supply of nutrients. All known Glomeromycota species reproduce asexually.[73]
The symbiotic
association between the Glomeromycota and plants is ancient, with evidence dating to 400
12. million years ago.[122]
Formerly part of the Zygomycota (commonly known as 'sugar' and 'pin'
molds), the Glomeromycota were elevated to phylum status in 2001 and now replace the older
phylum Zygomycota.[123]
Fungi that were placed in the Zygomycota are now being reassigned to
the Glomeromycota, or the subphyla incertae sedis Mucoromycotina, Kickxellomycotina, the
Zoopagomycotina and the Entomophthoromycotina.[42]
Some well-known examples of fungi
formerly in the Zygomycota include black bread mold (Rhizopus stolonifer), and Pilobolus
species, capable of ejecting spores several meters through the air.[124]
Medically relevant genera
include Mucor, Rhizomucor, and Rhizopus.
Diagram of an apothecium (the typical cup-like reproductive structure of Ascomycetes) showing sterile
tissues as well as developing and mature asci.
The Ascomycota, commonly known as sac fungi or ascomycetes, constitute the largest
taxonomic group within the Eumycota.[41]
These fungi form meiotic spores called ascospores,
which are enclosed in a special sac-like structure called an ascus. This phylum includes morels, a
few mushrooms and truffles, single-celled yeasts (e.g., of the genera Saccharomyces,
Kluyveromyces, Pichia, and Candida), and many filamentous fungi living as saprotrophs,
parasites, and mutualistic symbionts. Prominent and important genera of filamentous
ascomycetes include Aspergillus, Penicillium, Fusarium, and Claviceps. Many ascomycete
species have only been observed undergoing asexual reproduction (called anamorphic species),
but analysis of molecular data has often been able to identify their closest teleomorphs in the
Ascomycota.[125]
Because the products of meiosis are retained within the sac-like ascus,
ascomycetes have been used for elucidating principles of genetics and heredity (e.g., Neurospora
crassa).[126]
Members of the Basidiomycota, commonly known as the club fungi or basidiomycetes, produce
meiospores called basidiospores on club-like stalks called basidia. Most common mushrooms
belong to this group, as well as rust and smut fungi, which are major pathogens of grains. Other
important basidiomycetes include the maize pathogen Ustilago maydis,[127]
human commensal
species of the genus Malassezia,[128]
and the opportunistic human pathogen, Cryptococcus
neoformans.[129]
13. Ang fungus,[3]
binabaybay ding halamang singaw,[4]
(Ingles: fungus [isahan], fungi [maramihan][5]
) ay
isang uri ng organismong nabubuhay na hindi halaman o hayop; hindi rin ito protista, hindi eubakterya,
at hindi rin arkebakterya. Dating iniisip ng mga tao na halaman ang mga ito kaya't pinangalanan itong
halamang singaw. Tinutunaw ng mga halamang singaw ang mga patay na materya sa paligid nito para
magsilbing pagkain nila. Hindi lunti ang kulay ng mga ito. Hindi sila namumulaklak at wala ring mga
dahon. Kabilang dito ang mga kabuti.[3]
Sa larangan ng panggagamot, isa itong malaking pangkat ng mga
"halaman" na walang materya o bagay na pangkulay ng lunti na kinabibilangan ng mga kabuti,
tagulamin, at amag.[5]
Sa isang karamdamang dulot ng halamang-singaw, kinakailangang gamitan ng
mikroskopyo ang pagsusuri ng halamang-singaw sapagkat napakaliit ng mga ito upang makita ng mga
mata.[5]
Ang lahat ng bagay na may buhay (mga hayop, mga halaman, mga halamang-singaw, at mga protista) ay
may mga eukaryote (IPA: /juˈˈkærɪɒt/ o IPA: /-oʊt/). Ito ang mga selula na organisado at naka-
pagsamang may estruktura na nasa loob ng mga membrano nila. Ang membrana ay isang uri ng
estruktura na bumabalot sa mga selula at mga organelle nito. Ang katangiang ito ang naghihiwalay sa
eukaryote mula sa mga prokaryote. Ang nukleus ng mga eukaryote ang nagbibigay ng pangalan nila.
ng Eukaryote ay mula sa salitang Griyego na εσ, na ibig sabihin ay "totoo o mabuti" at κάρσον,
na ibig sabihin ay "pili". Karamihan sa mga selulang ito ay mayroong iba't ibang mga organelles
tulad ng mitokondriya, mga kloroplast at mga katawang Golgi. Mayroon din silang flagella na
yari sa mga mikrotubulo. Ang mga mikrotubulong ito ay may 9+2 na pagkaayos.
www.slideshare.net/nmonies/biology-9205264