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1
STRESS IN
PLANTS
related to waterOnline Lesson
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Definition:
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3
Fig. 1. Effects of different abiotic and biotic stresses on morphological,
biochemical and physiological attributes of plants.
Kumar, A., & Verma, J. P. (2018). Does plant—microbe interaction confer stress tolerance in plants: a review?. Microbiological
research, 207, 41-52.
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4
Fig. Plant responses to abiotic stresses
https://doi.org/10.1016/B978-0-12-800875-1.00002-8
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5
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6
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7
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8https://orbitbiotech.com/temperature-stress-plants-high-temperature-
stress/responses-of-a-plant-against-abiotic-stress-orbit-biotech-training/
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9
DROUGHT STRESS
Molecular and systems approaches towards drought‐tolerant canola crops
New Phytologist, Volume: 210, Issue: 4, Pages: 1169-1189, First published: 16 February 2016, DOI: (10.1111/nph.13866)
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11https://doi.org/10.1007/978-981-10-9029-5_1
Drought coping strategies in cotton: increased crop per drop
Plant Biotechnology Journal, Volume: 15, Issue: 3, Pages: 271-284, First published: 05 January 2017, DOI: (10.1111/pbi.12688)
Fig. Numerous effects of drought stress on cotton and their responses.
Drought coping strategies in cotton: increased crop per drop
Plant Biotechnology Journal, Volume: 15, Issue: 3, Pages: 271-284, First published: 05 January 2017, DOI: (10.1111/pbi.12688)
Fig. Various signalling pathways connectively enhance drought tolerance in cotton. These
pathways work together to maintain their normal activities under drought stress.
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14
Fig
A schematic model for the
physiological and molecular
strategies under drought stress
in teak deducted from this
study.
Roman numerals indicate the
consecutive order of processes
that the plant performs during
drought stress, based on
previous studies and reviews
[101–104]: I. Signal Perception
and Transduction (not studied
here). II. ABA signaling. III.
Physiological adjustment. IV.
Water and Ion Movement. V.
Osmoprotection and Metabolic
Adjustment. VI. Re-
establishment of Homeostasis
and Plant Protection (not
studied here). VII. Drought
Stress Tolerance (not studied
here). Green boxes denote the
strategies studied in the teak
leaf for some processes (at the
physiological and metabolic
level). Blue boxes denote the
strategies studied in the teak
root for some processes (at the
transcriptional level).
doi: https://doi.org/10.1371/journal.pone.0221571.g006
Figure . The abscisic acid (ABA)-dependent gene regulatory pathway in rice.
Basu S, Ramegowda V, Kumar A and Pereira A. Plant adaptation to drought stress
[version 1]. F1000Research 2016, 5:1554 (doi: 10.12688/f1000research.7678.1)
https://f1000resear
ch.com/articles/5-
1554
https://doi.org/10.1007/978-81-322-1620-9_8
WATER DEFICIT/STRESS
https://doi.org/10.1007/978-81-322-1620-9_8
https://doi.org/10.1007/978-81-322-1620-9_8
WATER STRESS SIGNALLING
Signal of water stress can be decreased cell water content,
decreased water potential and its components osmotic and
pressure potentials, increased concentration of solutes,
decreased cell volume, change in membrane tension,
changes in structure of macromolecules due to changes in
their hydration, changes in interaction between cell wall and
plasmalemma
Water stress receptors are not sufficiently known, probably
different for different signals
For root-shoot communication hydraulic and chemical
signals are used
Direct and indirect effects of water stress
WATER STRESS AFFECTS ALMOST ALL
PROCESSES IN PLANTS
Inhibition of elongation growth, cell division, changes in cell
wall synthesis
Inhibition of shoot growth and stimulation of root growth
and thus increase of root/shoot ratio
Acceleration of ageing
Production of stress proteins
Accumulation of osmotically active compounds (proline,
glycinebetaine, sugars, sugar alcohols)
ROS production and development of antioxidative systems
Inhibition of photosynthesis, transport of assimilates,
respiration
Changes in enzyme activities (decrease in activity of Rubisco,
PEPC, nitratereductase, but increase in activity of hydrolases
or dehydrogenases)
Changes in biosynthesis and catabolism of phytohormones,
especially ABA
Changes in absorption and transport of ions
MULTIPLE EFFECTS OF WATER STRESS
FIGURE.
Illustration of the
response of
plants to water
stress. Stomatal
response, ROS
scavenging,
metabolic
changes, and
photosynthesis are
all affected when
plants are
subjected to water
stress. These
collective
responses lead to
an adjustment in
the growth rate of
plants as an
adaptive response
for survival.
Figure. Physiological and molecular responses to drought stress in plant cells.
Molecular and cellular responses to drought stress include perception of
dehydration signal, signal transduction to cytoplasm and nucleus, gene expression,
and responses and tolerance to drought stress. ABA, abscisic acid.
https://doi.org/10.1016/B0-12-227050-
9/00110-1
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25
https://doi.org/10.3389/fpls.2014.00086
6/7/2020
THIS LECTURE SLIDE/HAND-OUT IS NOT AN
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26
FIGURE . A schematic diagram of unique
and shared effects of drought and chilling
stresses on crop plants.
https://doi.org/10.3389/fpls.2018.00393

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Plant ecophysiology online lesson water stress

  • 1. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 1 STRESS IN PLANTS related to waterOnline Lesson
  • 2. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 2 Definition:
  • 3. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 3 Fig. 1. Effects of different abiotic and biotic stresses on morphological, biochemical and physiological attributes of plants. Kumar, A., & Verma, J. P. (2018). Does plant—microbe interaction confer stress tolerance in plants: a review?. Microbiological research, 207, 41-52.
  • 4. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 4 Fig. Plant responses to abiotic stresses https://doi.org/10.1016/B978-0-12-800875-1.00002-8
  • 5. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 5
  • 6. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 6
  • 7. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 7
  • 8. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 8https://orbitbiotech.com/temperature-stress-plants-high-temperature- stress/responses-of-a-plant-against-abiotic-stress-orbit-biotech-training/
  • 9. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 9 DROUGHT STRESS
  • 10. Molecular and systems approaches towards drought‐tolerant canola crops New Phytologist, Volume: 210, Issue: 4, Pages: 1169-1189, First published: 16 February 2016, DOI: (10.1111/nph.13866)
  • 11. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 11https://doi.org/10.1007/978-981-10-9029-5_1
  • 12. Drought coping strategies in cotton: increased crop per drop Plant Biotechnology Journal, Volume: 15, Issue: 3, Pages: 271-284, First published: 05 January 2017, DOI: (10.1111/pbi.12688) Fig. Numerous effects of drought stress on cotton and their responses.
  • 13. Drought coping strategies in cotton: increased crop per drop Plant Biotechnology Journal, Volume: 15, Issue: 3, Pages: 271-284, First published: 05 January 2017, DOI: (10.1111/pbi.12688) Fig. Various signalling pathways connectively enhance drought tolerance in cotton. These pathways work together to maintain their normal activities under drought stress.
  • 14. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 14 Fig A schematic model for the physiological and molecular strategies under drought stress in teak deducted from this study. Roman numerals indicate the consecutive order of processes that the plant performs during drought stress, based on previous studies and reviews [101–104]: I. Signal Perception and Transduction (not studied here). II. ABA signaling. III. Physiological adjustment. IV. Water and Ion Movement. V. Osmoprotection and Metabolic Adjustment. VI. Re- establishment of Homeostasis and Plant Protection (not studied here). VII. Drought Stress Tolerance (not studied here). Green boxes denote the strategies studied in the teak leaf for some processes (at the physiological and metabolic level). Blue boxes denote the strategies studied in the teak root for some processes (at the transcriptional level). doi: https://doi.org/10.1371/journal.pone.0221571.g006
  • 15. Figure . The abscisic acid (ABA)-dependent gene regulatory pathway in rice. Basu S, Ramegowda V, Kumar A and Pereira A. Plant adaptation to drought stress [version 1]. F1000Research 2016, 5:1554 (doi: 10.12688/f1000research.7678.1) https://f1000resear ch.com/articles/5- 1554
  • 20. WATER STRESS SIGNALLING Signal of water stress can be decreased cell water content, decreased water potential and its components osmotic and pressure potentials, increased concentration of solutes, decreased cell volume, change in membrane tension, changes in structure of macromolecules due to changes in their hydration, changes in interaction between cell wall and plasmalemma Water stress receptors are not sufficiently known, probably different for different signals For root-shoot communication hydraulic and chemical signals are used Direct and indirect effects of water stress
  • 21. WATER STRESS AFFECTS ALMOST ALL PROCESSES IN PLANTS Inhibition of elongation growth, cell division, changes in cell wall synthesis Inhibition of shoot growth and stimulation of root growth and thus increase of root/shoot ratio Acceleration of ageing Production of stress proteins Accumulation of osmotically active compounds (proline, glycinebetaine, sugars, sugar alcohols) ROS production and development of antioxidative systems Inhibition of photosynthesis, transport of assimilates, respiration Changes in enzyme activities (decrease in activity of Rubisco, PEPC, nitratereductase, but increase in activity of hydrolases or dehydrogenases) Changes in biosynthesis and catabolism of phytohormones, especially ABA Changes in absorption and transport of ions
  • 22. MULTIPLE EFFECTS OF WATER STRESS
  • 23. FIGURE. Illustration of the response of plants to water stress. Stomatal response, ROS scavenging, metabolic changes, and photosynthesis are all affected when plants are subjected to water stress. These collective responses lead to an adjustment in the growth rate of plants as an adaptive response for survival.
  • 24. Figure. Physiological and molecular responses to drought stress in plant cells. Molecular and cellular responses to drought stress include perception of dehydration signal, signal transduction to cytoplasm and nucleus, gene expression, and responses and tolerance to drought stress. ABA, abscisic acid. https://doi.org/10.1016/B0-12-227050- 9/00110-1
  • 25. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 25 https://doi.org/10.3389/fpls.2014.00086
  • 26. 6/7/2020 THIS LECTURE SLIDE/HAND-OUT IS NOT AN ALTERNATIVE TO LECTURES, BOOKS AND OTHER REFERENCES: FOR STUDENTS' ADDITIONAL READING PURPOSE ONLY 26 FIGURE . A schematic diagram of unique and shared effects of drought and chilling stresses on crop plants. https://doi.org/10.3389/fpls.2018.00393