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M YASEEN K 112/15/2015
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resented by:Muhammad Yaseen Kanju
Presented to: Dr ALLAH WASAYA SB
Presented by: Muhammad Yaseen k
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Presentation Topic:
Plant response to Water and Drought deficit condition.
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Water-deficit When plants do not receive sufficient water they are subjected
to a stress called water deficit.
Water deficit in the plant disrupts many cellular and whole plant functions.
Negative impact plant growth and reproduction.
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Water-deficit Water stress is a abiotic induced by many environmental
conditions.
Water stress may arise through either an excess of water or deficit water .
Water stress is primary cause by water deficit such as a drought or high salinity .
Rate of duration influence the water stress response.
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Effect of water stress
Reduction of cell and leaves area.
Reduction in photosynthesis.
Impact on metabolism.
Effect on root and shoot growth.
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Water-deficit Stress
Plants have evolved many different mechanisms in their environments.
Availability of water is the most important factor in the environment.
That increase the production of our crops.
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Response to water deficit
Stomata close.
Reduced transpiration.
Stop plant growth and development.
Leaves wilting and browning leaves edges.
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Response to water deficit
Twigs and branches may be dies..Reduction flowers and fruits production.
Decrease Leaf size.
Not development of root.
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Response to water deficit
Photosynthesis stop.
Protective protein.
Transport protein in required part.
Synthesizing protein.
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StressExternal condition that adversely effect on growth
development and productivity.
Stress trigger a wide range on plat responses.
Altered gene expression.
Cellular metabolism.
Changes in growth rate and crop yields.
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Types of stressBiotic Living Organisms. A biotic Non living organism.• Biotic and A biotic Stresses can reduced plant productivity 65%
- 85 % depending on crop.
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Environmental conditions cause stress
Water logging.
Drought.
High Temperature.
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Resistance of plant to depend on stress
Varieties. Drought deficit.
Genotype. Gene or present in species.
Development age. Plant can tolerate in stress condition.
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Stress involving water deficit
Water related stress could affect on plants if environment contain insufficient water to meet basic need.
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Environmental condition that cause water deficitDrought Stress of water or heat.
Low temperature Disturb the function of plant.
Hyper saline condition High concentration of salt.
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Factors affect the response of water deficitDuration of water deficiency. How long period of stress.
The plant was water stress Necrosis , Leaf rolling , stop function
of plant.
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Drought stressMoisture scarcity.
Mechanisms of drought resistances.
Mature early. Maintain water balance.
Lower yield under low water potential.
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Plant response to droughtEarly maturing.
Reduced the grain size.
Less movement of nutrients.
Retards growth.
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Plant response to drought
Photosynthetic efficiency is reduced due to chloroplast damage.
Reduced transpiration and reduced transpiration losses.
Stomata behavior [Opening and closing].
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