Claim · model-written summary
Apparent photosynthesis declined in both groups in darkness.
- Taxon
- Alfalfa
Medicago sativat0 - Treatment
- constant darknesse3
- Outcome
- Rates of APe0
- Direction
- declinede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rates of AP declined in both groups of plants due to increases in both mesophyll and stomatal resistances”
t0“Alfalfa”
e1“Constant light increased both starch and sugar levels in low‐light plants”
e2“Rates of AP declined in low‐light plants upon transfer to constant light conditions”
e3“Starch and sugar levels of high‐light plants declined substantially upon transfer to constant darkness”
Title
Effect of Leaf Sugar and Starch Concentrations on Apparent Photosynthesis in Alfalfa
R. L. Travis; J. Prendergast Journal of Agronomy and Crop Science 1987. doi:10.1111/j.1439-037x.1987.tb00294.x
Other claims from this paper (15)
- Observation High-light plants had greater leaf nitrogen than low-light plants.
- Observation High-light plants had greater chlorophyll than low-light plants.
- Intervention effect Constant light increased starch in low-light plants.
- Intervention effect Constant light increased sugar in low-light plants.
- Intervention effect Constant light had little effect on high-light plants.
- Intervention effect Apparent photosynthesis declined in low-light plants transferred to constant light.
- Mechanism The decline in photosynthesis under constant light was apparently due to increased stomatal resistance.
- Association Leaf starch was negatively correlated with apparent photosynthesis in both groups.
- Association Leaf starch correlated positively with mesophyll resistance in both groups.
- Association Leaf sugar was not correlated with apparent photosynthesis or mesophyll resistance.
- Intervention effect Starch declined substantially in high-light plants transferred to darkness.
- Intervention effect Sugar declined substantially in high-light plants transferred to darkness.
- Intervention effect Low-light plants were less affected by transfer to darkness.
- Observation Neither sugar nor starch correlated with photosynthesis or mesophyll conductance in darkness.
- Mechanism The authors support starch-associated feedback inhibition of photosynthesis via mesophyll resistance.