Claim · model-written summary
Heat reduced relative water content and increased MDA and ion leakage in alfalfa leaves.
Medicago sativaVerbatim
e0“Compared to seedlings under room temperature,significant decrease of relative water content and increase of MDA content and ion leakage in alfalfa leaves occurred after 2 days of heat stress”
Title
Yiwei Mo 2008
Other claims from this paper (19)
- Intervention effect Heat increased MDA content and ion leakage in alfalfa leaves.
- Intervention effect Cold did not significantly change these alfalfa leaf injury indices over five days.
- Observation Guyana stylosanthes maintained high water content and low injury indices under heat.
- Intervention effect Cold significantly increased MDA and ion leakage in Guyana stylosanthes.
- Intervention effect Both temperature stresses increased sugars and sucrose enzyme activities in both legumes, more under cold stress.
- Intervention effect Cold and heat decreased starch in both legumes, with the lowest level under cold stress.
- Intervention effect Photosynthesis decreased in both legumes under heat and cold.
- Intervention effect Alfalfa photosynthesis decreased more under heat than cold.
- Intervention effect Guyana stylosanthes photosynthesis decreased more under cold than heat.
- Intervention effect Alfalfa fluorescence parameters fell strongly under heat and slightly under cold.
- Intervention effect Guyana stylosanthes fluorescence parameters fell strongly under cold, with no heat effect.
- Intervention effect Heat greatly decreased chloroplast ATP synthase activity and ATP content in alfalfa.
- Intervention effect Cold decreased ATP in Guyana stylosanthes, whereas heat did not.
- Intervention effect Both stresses decreased RuBPcase and FBPase activity in both legumes.
- Intervention effect Heat greatly decreased nitrogen assimilation enzyme activities in alfalfa leaves.
- Intervention effect Cold greatly decreased nitrogen assimilation enzyme activities in Guyana stylosanthes.
- Intervention effect Temperature stress accumulated nitrate and ammonium nitrogen in both legumes, with higher levels under heat.
- Mechanism Authors attribute nitrate and ammonium accumulation to lower reductase activity.
- Mechanism Authors link photosystem II injury to impaired photophosphorylation, ATP supply, photosynthesis and nitrogen assimilation.