Claim · model-written summary
Water deficit reduced transpiration in Valencia orange leaves.
- Taxon
- Citrus sinensis [L.] Osbeck
Citrus sinensise0 - Treatment
- water-deficit (stress)e0
- Outcome
- transpiratione0
- Direction
- reducede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic CO(2) assimilation, transpiration, ribulose-1,5-bisphosphate carboxylase (RuBPCase), and soluble protein were reduced in leaves of water-deficit (stress) ;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 Maximum photosynthetic CO(2) assimilation in stressed leaves was 58% of control.
- Intervention effect Maximum transpiration in stressed leaves was 40% 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.