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 Transport in Plants Online Biology Class 

  • Following is the list of topics that are covered during online biology classes for NEET preparation.

  • After completion of all the topics of the chapter, MCQs based on NEET Pattern questions are discussed.

  • Doubts during the class are also cleared. You can also post your doubts and we will promptly answer it.

11. Introduction

  • Transport of water

  • Transport of minerals

  • Transport of organic solutes

  • Means of transport

11.2 Diffusion

  • Diffusion pressure D.P.

  • Factors influencing diffusion

  • Temperature

  • Density of diffusing substance

  • Medium in which diffusion occurs

  • Diffusion pressure gradient

  • Importance of diffusion in plants

  • Conditions important for diffusion across a cellular membrane

  • Facilitated diffusion

  • Passive symport and antiports

  • Active transport

  • Comparison of different transport processes

11.3 Pant water relation

  • Importance of water in living systems

  • Water potential  Yw

  • Components of water potential

  • Gravity potential Yg

  • Matric potential Ym

  • Solute potential Yp

  • Permeability

11.4 Osmosis

  • explanation

  • Osmotic concentration(hypertonic, hypotonic and isotonic solutions)

  • Hypertonic solution

  • Hypotonic solution

  • isotonic

  • Demonstration of osmosis

  • Expt. 1 demonstrate osmosis by thistle funnel method

  • Osmotic pressure

  • The importance of osmosis in plants

  • Turgor pressure

  • Osmotic relations of the cell

  • In case of fully turgid cell

  • In case of flaccid cell

  • In case of plasmolysed cell

  • Plasmolysis

  • Imbibation

11.5 Long distance transport of the water

  • Soil water relation

  • Gravitational water

  • Capillary water

  • Hygroscopic or imbibed water

  • Runaway water

  • Chemically combined water

  • Water absorbing organ

  • Absorption of water by root hair

  • Active water absorption

  • Passive water absorption

  • Pathway of water movement in roots

  • Apoplast pathway

  • Symplast pathway

  • Role of mycorrhiza

11.6 Ascent of sap(water movement up a plant)

  • Root pressure theory

  • Expt 2. To demonstrate root pressure

  • Transpiration pull and cohesion of water theory

  • Transpiration

  • The magnitude of transpiration

  • Types of transpiration

  • Stomatal transpiration

  • Cuticular transpiration

  • Lenticular transpiration

  • Mechanism of water loss

  • Stomatal transpiration

11.7 The stomata

  • Physiology of stomata

  • Mechanism of stomatal movement

  • Starch-sugar hypothesis

  • In light

  • In dark

  • Criticism

  • Proton transport concept (role of K+ in stomatal movement)

  • In light

  • In dark

  • Blue light stimulated stomatal opening

11.8 Factors affecting the rate of transpiration

  • External factors

  • Atmospheric humidity

  • Temperature

  • Light

  • Wind velocity

  • Atmospheric pressure

  • Available soil water

  • Internal factors

  • Leaf area

  • Leaf structure

  • Age of plants

  • Transpiration and photosynthesis-a compromise

11.9 Guttation

  • Uptake and transport of mineral nutrition

  • Uptake of mineral ions

  • Translocation of mineral ions

  • Translocation of organic nutrients (solutes)

  • Evidences in support that translocation occurs through phloem

  • Ringing or girdling expt.

  • Isotopic studies

  • Chemical analysis of phloem sap

11.10 Mechanism of phloem translocation

  • Munch’s mass flow hypothesis

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