Abstract
The effects of drought stress and exogenous abscisic acid on the expression of ribulose-1, 5-bisphosphate carboxyIase/oxygenase activase (Rubisco activase) were examined in wheat (Triticum aestivumL.). In response to water stress and abscisic acid, both the levels of endogenous abscisic acid and Rubiscoactivase increased in the leaves. Immunoblot analysis showed that both drought stress and abscisic acid,increased the amount of a 51KD activase form of the enzyme. In addition, our results from wheat leavesshowed that Rubisco activase up regulated under drought stress by increasing the amount of endogenousabscisic acid. Therefore the level of Rubisco activase was dependent on the abscisic acid level. These resultsare consistent with previous findings that Rubisco activase increases under high temperature stress. Theseresults indicate that the increased rate of activases synthesis may play a role in coping with the decline inphotosynthetic capacity under drought stress. Effects of drought stress and abscisic acid and their interactionwere highly significant (p<0.01) for all variables.
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Claims 4
Claim · model-written summary
Water stress and abscisic acid increased endogenous abscisic acid in wheat leaves.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- leavese0
- Treatment
- water stress and abscisic acide0
- Outcome
- levels of endogenous abscisic acide0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In response to water stress and abscisic acid, both the levels of endogenous abscisic acid and Rubiscoactivase increased in the leaves.”
t0“wheat”
Claim · model-written summary
Water stress and abscisic acid increased Rubisco activase in wheat leaves.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- leavese0
- Treatment
- water stress and abscisic acide0
- Outcome
- Rubiscoactivasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In response to water stress and abscisic acid, both the levels of endogenous abscisic acid and Rubiscoactivase increased in the leaves.”
t0“wheat”
Claim · model-written summary
Drought stress and abscisic acid increased the 51KD activase form.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- drought stress and abscisic acide0
- Outcome
- amount of a 51KD activase form of the enzymee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both drought stress and abscisic acid,increased the amount of a 51KD activase form of the enzyme.”
t0“wheat”
Claim · model-written summary
Rubisco activase level depended on abscisic acid level.
- Taxon
- wheatTriticum aestivumt0
- Compound
- abscisic acide0
- Outcome
- level of Rubisco activasee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore the level of Rubisco activase was dependent on the abscisic acid level.”
t0“wheat”
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