Claim · model-written summary
At an early ageing stage, declining photosynthesis is not related to lower-surface stomatal resistance.
- Taxon
- cotton
Gossypium hirsutume2 - Organ / stage
- lowere0
- Outcome
- decline in photosynthesise1
- Direction
- not relatede0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“not related to the lower stomatal resistance”
e1“the decline in photosynthesis at an early stage of ageing”
e2“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.
- Mechanism The initial decrease in photosynthesis and increase in upper-surface resistance occur simultaneously without a causal relation.
- 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.