This document discusses the mechanisms by which nutrients are absorbed by plant roots from soil. It explains that nutrients come into contact with roots through root interception, mass flow, or diffusion. Root interception occurs when nutrients physically contact roots, while mass flow transports nutrients to roots via water movement. Diffusion moves nutrients along a concentration gradient from high to low. Nutrients are then absorbed passively through the root cell walls or actively through the cells with energy usage. Passive absorption follows concentration gradients, while active transport moves nutrients against gradients with carrier proteins.
This presentation describes the nutrient uptake in plants. it explains the passive and active uptake of nutrient uptake. which are further explained as diffusion, facilitated diffusion, carrier proteins, channel proteins, ion exchange & contact exchange.
This presentation describes the nutrient uptake in plants. it explains the passive and active uptake of nutrient uptake. which are further explained as diffusion, facilitated diffusion, carrier proteins, channel proteins, ion exchange & contact exchange.
Biological assays are methods for the estimation of nature, constitution or potency of a material by means of the reaction that follows its application to living matter
Mineral nutrients: essential, non-essential elements, criteria of essentiality, macro and micro elements and their list, function and deficiency symptoms of macro and micro elements, beneficial elements and their function
Biological assays are methods for the estimation of nature, constitution or potency of a material by means of the reaction that follows its application to living matter
Mineral nutrients: essential, non-essential elements, criteria of essentiality, macro and micro elements and their list, function and deficiency symptoms of macro and micro elements, beneficial elements and their function
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Osmosis and Diffusion
Diffusion and Osmosis in an egg
Low concentration
1.1 Diffusion is the process of molecules spreading from areas of high concentration to areas of low concentration.
High concentration
1.1 Osmosis is the diffusion of water molecules through a semi permeable membrane from the area of low concentration of solute to the area of high concentration of solute.
1.2 Diffusion is important to living cells because it s the way they take in materials from the environment, and they also prevent themselves of unwanted materials produced in their cells. Osmosis on the other hand, is also important to living cells, because it s the way that water can enter and leave their cells through diffusion (class note the movement of molecules).
1.3 Aim:...show more content...The egg with the most amount of sucrose solution gained the most weight.
4.1 Specific organism involved in Osmosis and diffusion:
In the human body osmosis and diffusion is involved in the process of cleaning/filtering the kidney, where diffusion is used to selectively move solutes through the cells and Osmosis is used to absorb 99% of the water (Ivyrose Ltd. 2003).
4.2 How osmosis and diffusion is used in the kidneys:
Diffusion is a form of transport, which requires no energy (passive transport), and allows substances to flow from areas of high concentration, to areas of low concentration, and Osmosis happens when water is flowed from areas of high concentration, to areas of low concentration.
In the case of the kidneys, when human kidneys filter/clean blood it uses three mechanisms, two of the mechanisms is, Osmosis and diffusion. Most of the energy that our kidneys consume is reabsorbed by sodium ions (Na+), w
⢠Active transport is a mode of transportation in plants, which uses stored energy to move the particles against the concentration gradient. In a plant cell, it takes place in the root cells by absorbing water and minerals.
⢠The intake of mineral ions by the root system along the concentration gradient by diffusion without the expenditure of energy is called passive absorption.
Nutrient Movement in Soils- Nutrient Absorption By Plants Mechanistic Approac...AKSHAYMAGAR17
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âNutrient Movement in Soils- Nutrient Absorption By Plants Mechanistic Approaches to Nutrient Supply and Uptake By Plants ; Models for Transformation and Movement of Major and Micronutrient in Soils
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A brief information about the SCOP protein database used in bioinformatics.
The Structural Classification of Proteins (SCOP) database is a comprehensive and authoritative resource for the structural and evolutionary relationships of proteins. It provides a detailed and curated classification of protein structures, grouping them into families, superfamilies, and folds based on their structural and sequence similarities.
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For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
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Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
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As consumer awareness of health and wellness rises, the nutraceutical marketâwhich includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutritionâis growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
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Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leberâs hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendelâs laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four Oâclock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
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Mechanism of nutrient absorption
1. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption
Mechanism of Nutrient Absorption
Krishna Aryal
Asst. Professor (Soil Science)
Krish.aryal2014@gmail.com
1
2. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 2
Movement of nutrient from soil to root
⢠Roots do not intentionally grow towards a nutrient source.
⢠For nutrient uptake to occur, the individual nutrient ion must be in position
adjacent to the root.
⢠There are three basic methods in which nutrients comes in contact with
the root surface for plant uptake; they are;
i. Root interception
ii. Mass flow
iii. Diffusion
3. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 3
i. Root interception:
⢠Root interception occurs when a nutrient comes into physical contact with
the root surface.
⢠As a general rule, the occurrence of root interception increases as the root
surface area & mass increases, thus enabling the plant to explore a greater
amount of soil.
⢠Root interception may be enhanced by mycorrhizal fungi, which colonize
roots & increases root exploration into the soil.
⢠Root interception is responsible for an appreciable amount of Ca and P
uptake, & some amounts of Mg, Zn & Mn.
4. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 4
ii. Mass flow:
⢠Mass flow occurs when nutrients are transported to the surface of roots
by the movement of water in the soil (i.e. percolation, evaporation etc.).
⢠The rate of water flow governs the amount of nutrients that are
transported to the root surface.
⢠Therefore, mass flow decreases as soil water decreases.
⢠Most of the nitrogen, calcium, magnesium, sulphur, copper, boron,
manganese & molybdenum move to the root by mass flow.
5. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 5
iii. Diffusion:
⢠Diffusion is the movement of a particular nutrient along a concentration
gradient.
⢠When there is a difference in concentration of a particular nutrient within
the soil solution, the nutrient will move from an area of higher concentration
to an area of lower concentration.
⢠Diffusion delivers appreciable amounts of phosphorus, potassium, zinc, &
iron to the root surface.
⢠Diffusion is a relatively slow process compared to the mass flow of
nutrients with water movement toward the root.
6. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 6
Nutrient absorption by plant roots
Plant absorption of ions from the soil solutions/root space can be
described by;
i. Passive absorption( Apoplastic)
ii. Active absorption (Symplastic)
7. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 7
i. Passive Absorption
⢠Rapid movement of ions into the free spaces (space between cell wall
and plasma membrane called apoplast)
⢠Ions moves along the concentration gradient( higher to lower)
⢠Do not require energy(ATP) thus called passive.
The major hypothesis (theories) that explain the mechanism of passive
absorption of ions are:
1. Mass flow theory. 2. Contact Exchange theory.
3.Carbonic Acid Exchange Theory 4. Donnan Equilibrium
8. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 8
Mass flow theory
⢠According to this theory ions are absorbed by the root along with mass
flow of water under the effect of transpiration.
⢠An increase in transpiration pull increases the uptake of ions by the roots,
(the uptake of ions by free diffusion).
⢠Thus, mass flow of ions through the root tissues occurs due to
transpiration pull in the absence of metabolic energy.
9. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 9
Contact Exchange Theory
⢠According to this theory, the ions adsorbed on the clay micelles get
adsorbed to the root in exchange for hydrogen ions, previously, adsorbed on
the root.
⢠Ions adsorbed on solid particles oscillate within a small space. When two
particles are close enough, the oscillation space of an ion adsorbed to one
particle overlaps the oscillation space of an ion adsorbed to another particle.
Thus exchange of ions may take place.
10. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 10
Carbonic Acid Exchange Theory
⢠The soil solution provides medium for exchange of ions between the root
and clay micelles.
⢠Carbon dioxide released in respiration of root forms carbonic acid by
reacting with water of the soil solution.
⢠Carbonic acid then dissociates in the soil solution to form Hâş and HCOââť
ions shown above expression.
⢠H⺠ions are adsorbed to the clay micelles in exchange for cations, such as
Kâş , which are released into the soil solution.
⢠From here they may diffuse to the root, where they may be adsorbed in
exchange for Hâş ions.
11. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 11
12. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 12
Donnan Equilibrium
⢠As cell membrane is composed of macromolecules of proteins and lipids
that have many carboxyl groups (-COOH) and phosphate (HPOââť)
groups, from which positively charged particles like protons of hydrogen
(Hâş) can dissociate, leaving the macromolecules with negative charge
called non diffusible anions.
⢠To counterpart the negative charge positively charged anions moves
inside the cell membrane and thus equilibrium exists known as Donnan
Equilibrium.
⢠C+ (ouside). A-(outside) = C+ (inside). A-(inside)
13. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 13
ii. Active Absorption
⢠Movement of ions through inner space (called Symplast)
⢠Ions moves against the concentration gradient
⢠Requires energy(ATP) thus called active.
⢠Slow movement of ions
⢠The major hypothesis that explain
the mechanism of active transport
of ions is:
Carrier Concept â transport by
a carrier protein.
14. Institute of Agriculture and Animal Science (IAAS)
Prithu Technical College
Deukhuri, Dang
SSC-121 Mechanism of Nutrient Absorption 14