Abstract
Nitrogen nutrition exerted a strong effect on stomatal sensitivity to water stress in cotton. In well-watered plants grown with 0.31 millimolar N in the nutrient solution, stomata closed at a water potential of -9 bars even though the wilting point was below -15 bars. For each doubling of nutrient N level, the water potential for stomatal closure decreased by about 2 bars. Elevated intercellular CO(2) concentrations caused only slight stomatal closure regardless of N nutrition. Exogenous abscisic acid (ABA) greatly increased stomatal sensitivity to elevated CO(2) concentrations.PLANTS SUBJECTED TO WATER STRESS GAVE THE FOLLOWING RESPONSES: (a) decreased stomatal conductance at ambient external CO(2) concentration; (b) increased stomatal sensitivity to elevated CO(2) concentrations; (c) decreased mesophyll conductance to CO(2); and (d) increased endogenous ABA content. All of these responses to stress occurred at a higher water potential in N-deficient plants than in normal plants. The results show that N nutrition and water stress interact to control ABA accumulation and the events regulated by that accumulation.
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Claims 9
Claim · model-written summary
At 0.31 millimolar N, well-watered cotton stomata closed at -9 bars while wilting occurred below -15 bars.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- 0.31 millimolar Ne0
- Outcome
- stomata closed at a water potentiale0
- Value
- -9 barse0
- Qualifier
- wilting point was below -15 barse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In well-watered plants grown with 0.31 millimolar N in the nutrient solution, stomata closed at a water potential of -9 bars even though the wilting point was below -15 bars”
t0“Cotton Plants”
Claim · model-written summary
Each doubling of nutrient N lowered the water potential for stomatal closure by about 2 bars.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- doubling of nutrient N levele0
- Outcome
- water potential for stomatal closuree0
- Direction
- decreasede0
- Value
- about 2 barse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For each doubling of nutrient N level, the water potential for stomatal closure decreased by about 2 bars”
t0“Cotton Plants”
Claim · model-written summary
Elevated intercellular CO2 caused slight stomatal closure regardless of N nutrition.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Elevated intercellular CO(2) concentrationse0
- Outcome
- stomatal closuree0
- Direction
- slighte0
- Qualifier
- regardless of N nutritione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elevated intercellular CO(2) concentrations caused only slight stomatal closure regardless of N nutrition”
t0“Cotton Plants”
Claim · model-written summary
Exogenous ABA greatly increased stomatal sensitivity to elevated CO2.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Exogenous abscisic acid (ABA)e0
- Outcome
- stomatal sensitivity to elevated CO(2) concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous abscisic acid (ABA) greatly increased stomatal sensitivity to elevated CO(2) concentrations”
t0“Cotton Plants”
Claim · model-written summary
Water stress decreased stomatal conductance at ambient external CO2.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- WATER STRESSe0
- Outcome
- stomatal conductancee0
- Direction
- decreasede0
- Qualifier
- ambient external CO(2) concentratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PLANTS SUBJECTED TO WATER STRESS GAVE THE FOLLOWING RESPONSES: (a) decreased stomatal conductance at ambient external CO(2) concentration”
t0“Cotton Plants”
Claim · model-written summary
Water stress increased stomatal sensitivity to elevated CO2.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- WATER STRESSe0
- Outcome
- stomatal sensitivity to elevated CO(2) concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PLANTS SUBJECTED TO WATER STRESS GAVE THE FOLLOWING RESPONSES: (a) decreased stomatal conductance at ambient external CO(2) concentration; (b) increased stomatal sensitivity to elevated CO(2) concentrations”
t0“Cotton Plants”
Claim · model-written summary
Water stress decreased mesophyll conductance to CO2.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- WATER STRESSe0
- Outcome
- mesophyll conductance to CO(2)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PLANTS SUBJECTED TO WATER STRESS GAVE THE FOLLOWING RESPONSES: (a) decreased stomatal conductance at ambient external CO(2) concentration; (b) increased stomatal sensitivity to elevated CO(2) concentrations; (c) decreased mesophyll conductance to CO(2)”
t0“Cotton Plants”
Claim · model-written summary
Water stress increased endogenous ABA content.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- WATER STRESSe0
- Outcome
- endogenous ABA contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PLANTS SUBJECTED TO WATER STRESS GAVE THE FOLLOWING RESPONSES: (a) decreased stomatal conductance at ambient external CO(2) concentration; (b) increased stomatal sensitivity to elevated CO(2) concentrations; (c) decreased mesophyll conductance to CO(2); and (d) increased endogenous ABA content”
t0“Cotton Plants”
Claim · model-written summary
Water stress responses occurred at higher water potential in N-deficient cotton than normal plants.
- Taxon
- CottonGossypium hirsutumt0
- Material
- N-deficient plantse0
- Outcome
- water potentiale0
- Direction
- highere0
- Comparator
- normal plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All of these responses to stress occurred at a higher water potential in N-deficient plants than in normal plants”
t0“Cotton Plants”
The same questions in other papers
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