This document summarizes the physiology of stems, including:
1) Conduction of materials like water and minerals occurs through xylem via root pressure, capillary action, atmospheric pressure, living cells, and transpiration pull.
2) Phloem conducts foods downward and some minerals and foods upward. Vascular rays conduct transversely.
3) Other stem functions include food storage, climbing, food manufacture, and reproduction.
4) Practical applications discussed include pruning, girdling, and grafting techniques.
This chapter was really heavy
Divided it in three parts ,
1. Roots, Stem , leaves
2.Flowers, Fruits ,seed
Two parts are included, third part will be uploaded soon.
~Please comment ~ Feel free to Suggest~♥
This chapter was really heavy
Divided it in three parts ,
1. Roots, Stem , leaves
2.Flowers, Fruits ,seed
Two parts are included, third part will be uploaded soon.
~Please comment ~ Feel free to Suggest~♥
Morphology and modifications of roots.pptxmanoj Joshi
The plants that we see today is the result of billions of years of evolution. Today, plants cover almost 30 per cent of the total landmass and account for the 50 per cent of the plant’s productivity (generation of biomass). Plants fulfil many roles in the ecosystem. They are a source of food, nutrition, shelter, maintain the integrity of soil (by preventing erosion) and most importantly, they are the main source for balancing the oxygen level in the atmosphere.
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)
Morphology and modifications of roots.pptxmanoj Joshi
The plants that we see today is the result of billions of years of evolution. Today, plants cover almost 30 per cent of the total landmass and account for the 50 per cent of the plant’s productivity (generation of biomass). Plants fulfil many roles in the ecosystem. They are a source of food, nutrition, shelter, maintain the integrity of soil (by preventing erosion) and most importantly, they are the main source for balancing the oxygen level in the atmosphere.
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)
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
2. CONDUCTION OF MATERIALS BY
STEMS
Conduction by Xylem
Chief function of xylem is the
upward conduction of water and
dissolved substances (sap). These
dissolved substances are chiefly mineral
salts from the soil; also, foods previously
stored in the roots and stem may be
conducted upward in spring in woody
plants.
3. Ascents of Saps
Root Pressure
This explains the exudation of sap
from the stumps of decapitated or
detopped plants including those of
trees that were newly felled.
4. Capillary Attraction
1)water rises in narrow tubes due to the
force of surface tension
• It stated that it is the capillary action of
narrow xylem tubes and it is further
supported by atmospheric pressure
6. Action of Living Cells
Suggested that living cells
adjoining the conduction cells of
the xylem force water upward,
possibly by some sort of pumping
action.
7. Imbibition in Cell Walls of Xylem
The cell walls of xylem cells
absorb water ny imbibition, but
imbibitional force is not sufficient to
explain either the rapidity or
magnitude of sap rise.
8. Transpiration Pull and Water
Cohesion
This explains that the upward movement of
water is mainly due to the creation of a negative
force or tension attributed to the continuous
evaporation of water at the surfaces of leaves in
the process of transpiration. As molecule after
molecule of water evaporates through the
stomata, it creates a pulling action on the next
molecules of water in the transpiration stream.
9. The transpiration pull is similar to the
suction force when drinking some
fluid from a bottle or glass with a
straw. Water can also be sucked into
a pippette with the use of an
ordinary rubber aspirator or with a
common medicine dropper.
10. Conduction by Phloem
The chief evidence of phloem is the
downward conduction of foods
manufactured in the leaves.
Some upward conduction of
minerals and foods occurs in the
phloem.
11. Conduction of Vascular Rays
In which extend ought
radially in stems extend through
the xylem and also into the
phloem. These rays bring about
the transverAse (crosswise)
conduction of foods, minerals,
water, and gases.
12. Other Functions of stems
Food Storage
Occurs chiefly in the parenchyma cells
of cortex, rays, and pith, and also in the
phloem and xylem parenchyma.
Climbing stems
Tendrils, such as those of grapes, or
twining stems such as those of morning
glories, are examples.
13. Food Manufacture
stems ehich contain chlorophyll, such as
those of most herbaceous plants and of cacti,
manufacture food.
Reproduction
Production is brought about by
runners, by the branching rhizomes , by the
formation of new bulbs and corns from older
ones, etc.
14. PRACTICAL APPLICATIONS OF A
KNOWLEDGE OF STEM STRUCTURE AND
PHYSIOLOGY
PRUNING
In pruning away diseased , broken
or otherwise undesired branch, the cut
should be made as close to the main
branch as parallel to i, in order that the
growth tissues sorrounding the wound
may form new tissues to heal the
wound.
15. GIRDLING
Is the removal of a complete ring of
bark . Girdling stops the downward passage
of food, which collects above the girdle.
Practiced in order to;
1. Produce large fruits
2. Kill trees, in clearing land.
3.Produce more flowersin the season
following girdle.
16. GRAFTING
Is a horticultural practice in
which two freshly cut stem
surfaces are bound together in
such fashion that their cells
grow together; thus there is
formeda union between the two
pieces of stem.