Claim · model-written summary
The initial decrease in photosynthesis and increase in upper-surface resistance occur simultaneously without a causal relation.
- Taxon
- cotton
Gossypium hirsutume1 - Outcome
- decrease in photosynthesise0
- Qualifier
- not causally related but occur simultaneouslye0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decrease in photosynthesis and increase in stomatal resistance of the upper surface are not causally related but occur simultaneously”
e1“cotton leaves ( Gossypium hirsutum )”
Title
The Relation between Photosynthesis and Stomatal Resistance of Each Leaf Surface in Cotton Leaves
S. NAGARAJAH Physiologia Plantarum 1975. doi:10.1111/j.1399-3054.1975.tb01857.x
Other claims from this paper (10)
- Observation During ageing, upper-surface stomatal resistance increases before lower-surface resistance.
- Observation Upper-surface stomata may begin ageing before lower-surface stomata.
- Association At an early ageing stage, declining photosynthesis is negatively correlated with upper-surface stomatal resistance.
- Association At an early ageing stage, declining photosynthesis is not related to lower-surface stomatal resistance.
- Association At advanced ageing, lower-surface resistance increases and declining photosynthesis becomes related to resistance of both surfaces.
- Association Increasing illumination stepwise increases photosynthesis in relation to reduced resistance on each leaf surface.
- Observation At low light, lower-surface stomatal resistance is low while upper-surface resistance is relatively high.
- Association The resistance difference between surfaces decreases as light intensity increases.
- Observation Upper stomata appear to need higher light intensity to open than lower stomata.
- Association Stomatal resistance on both leaf surfaces is unrelated to stomatal frequency.