Claim · model-written summary
At intermediate NaCl levels, decreases in stomatal conductance limited photosynthetic carbon assimilation in celery.
- Taxon
- celery
%2C_Elswick%2C_Northumberland_4.jpg?width=60)
Apium graveolens Dulce Groupe0 - Treatment
- intermediate levelse1
- Outcome
- stomatal conductancee1
- Direction
- decreasese1
- Qualifier
- limited Ae1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_Elswick%2C_Northumberland_4.jpg?width=500)
Verbatim
e0“Mature celery plants”
e1“at intermediate levels decreases in stomatal conductance limited A”
Title
J. D. Everard; R. Gucci; S. C. Kann; et al. PLANT PHYSIOLOGY 1994. doi:10.1104/pp.106.1.281
Other claims from this paper (15)
- Intervention effect Mature celery plants exposed to 25, 100 and 300 mM NaCl displayed substantial salt tolerance.
- Intervention effect Shoot fresh weight of celery increased at low NaCl concentrations compared with controls.
- Observation Celery growth continued at slower rates even after prolonged exposure to high salinities.
- Intervention effect Low NaCl levels had little or no effect on photosynthetic carbon assimilation in celery.
- Mechanism At the highest NaCl levels, carboxylation capacity and electron transport were the apparent prevailing limits to photosynthetic assimilation in celery.
- Intervention effect Increasing salinity up to 300 mM increased mannitol accumulation in celery leaf tissues.
- Intervention effect Increasing salinity up to 300 mM decreased sucrose and starch pools in celery leaf tissues.
- Intervention effect The ratio of mannitol to sucrose in celery increased almost 10-fold with increasing salinity.
- Mechanism The changes in mannitol and sucrose were due in part to shifts in photosynthetic carbon partitioning from sucrose into mannitol, measured by 14C labeling.
- Intervention effect Salt treatments increased mannose-6-phosphate reductase activity 6-fold in young celery leaves.
- Intervention effect Salt treatments increased mannose-6-phosphate reductase activity 2-fold in fully expanded, mature celery leaves.
- Observation Increases in M6PR protein were not apparent in the older celery leaves.
- Intervention effect Mannitol biosynthetic capacity, measured by labeling rates, was maintained in celery despite salt treatment.
- Intervention effect Relative partitioning into mannitol in celery increased despite decreased photosynthetic capacity under salt treatment.
- Mechanism The authors conclude that the results support a role for mannitol accumulation in adaptation to and tolerance of salinity stress in celery.