Claim · model-written summary
Maximum transpiration in stressed leaves was 40% of control.
- Taxon
- Citrus sinensis [L.] Osbeck
Citrus sinensist0 - Treatment
- stress (-2.0 megapascals leaf water potential)e0
- Outcome
- transpiratione0
- Value
- 40%e0
- Comparator
- control (-0.6 megapascals leaf water potential)e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum photosynthetic CO(2) assimilation and transpiration, which occurred before midday for both control and stressed plants, was 58 and 40%, respectively, for the stress (-2.0 megapascals leaf water potential) as compared to the control (-0.6 megapascals leaf water potential).”
t0“Valencia' Orange (Citrus sinensis [L.] Osbeck)”
Title
Joseph C. V. Vu; George Yelenosky PLANT PHYSIOLOGY 1988. doi:10.1104/pp.88.2.375
Other claims from this paper (16)
- Intervention effect Water deficit reduced photosynthetic CO(2) assimilation in Valencia orange leaves.
- Intervention effect Water deficit reduced transpiration in Valencia orange leaves.
- Intervention effect Maximum photosynthetic CO(2) assimilation in stressed leaves was 58% of control.
- Intervention effect As afternoon water deficit intensified, stressed-leaf transpiration declined.
- Intervention effect As afternoon water deficit intensified, photosynthetic CO(2) assimilation rapidly reached zero.
- Intervention effect Water deficit decreased RuBPCase activation.
- Intervention effect Water deficit decreased total RuBPCase activity.
- Observation RuBPCase activation was about 62% under stress versus 80% in controls.
- Intervention effect Water deficit reduced initial RuBPCase activity by 40%.
- Intervention effect Water deficit reduced HCO(3) (-)/Mg(2+)-saturated RuBPCase activity by 22%.
- Observation RuBPCase K(cat) was similar in stressed and control leaves at 25 moles CO(2) per mole enzyme per second.
- Observation RuBPCase K(m) for CO(2) was similar in stressed and control leaves at 18.9 micromolar.
- Observation RuBPCase concentration in stressed leaves averaged 80% of controls.
- Observation Soluble protein concentration in stressed leaves averaged 85% of controls.
- Mechanism Reduced RuBPCase activation and concentration contributed to reduced enzyme activity during water deficit.
- Observation Leaf photosynthesis, soluble protein, and RuBPCase activation and concentration recovered within 5 days after rewatering.