Morphologica, anatomical changes during water stress in vegetable crops

1. Morphological,
anatomical changes
during water stress
Babanjeet
L-2021-H-85-

2. 01
02
What is Water Stress ?
2
No rainfall
Low temp.
High salt conc.
Transient loss of
turgor at mid
day
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 A major abiotic stress
 Induced by many environmental conditions.

3. Morphological Changes

4. 1. Growth Changes
 Reduction in cell and leaf expansion
Effect of water stress on leaf expansion of tomato

5. On leaf surface is increased, which
reduces cuticular transpiration &
increases reflection
Is increased. This in turn
compresses plasma membrane &
increase thickness
Cell thickness
Is increased as with reduced leaf
expansion, more C translocated
towards roots. This increases
water supply.
Stem length
Reduced ( potato, okra) etc .
Root growth
Wax deposition

6. Water stress causes reduction in yield. Because
2) Yield
 Water stress → reduced leaf area → reduced
photosynthetic surface → reduced light interception →
reduced dry matter production.
 Water stress → stomata closes → reduce intake of CO2 →
reduced photosynthesis → reduced dry matter production

7. Leaf movement
Leaf movement can provide additional protection against
heating during water stress.
Additional strategies for adapting leaf area to water stress:
 Loss of leaves
 Wilting (changes angle of the leaf)
 Morphology (vertical leaves)
 Leaf rolling (in grasses)
Reduction of radiation load results in less evaporation.
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8. Your Date Here Your Footer Here 8
Strong effect of water stress on leaf position in cowpea

10. Usually form in the roots
Reduce oxygen leakage
during its transport from
shoot-to-root tip
Impede soil
phytotoxin
Triggered by the
organic acids
Filled with gas spaces to
facilitate the diffusion of
oxygen
Formed in the mid-cortex
cells and its formation was
mediated by ROS
It forms in roots and
shoots
Consists of thin-walled cells
Gonzali et al 2017; Kieliszek
Anatomical Changes

11. Water stress
Molecular
mechanisms
of
ROLLB
aerenchyma
Maohuaet al 2022

12. 1
2
Phylogenetic
tree
of
TF
from
different
plant
species
These genes are
for water stress
tolerance
Tree was constructed
using a neighbor-
joining method with
1000 bootstraps
Weitao Jia et al 2021

13. Stomata closure
(D’ Amato et al 2020)