Claim · model-written summary
Common models strongly overestimated wheat leaf photosynthesis under variable temperature and drought.
Triticum aestivumVerbatim
e0“The commonly used modelling approaches, which typically consider the response of diffusional parameters, but ignore acclimation responses of biochemical parameters to drought and T growth , strongly overestimate leaf photosynthesis under variable temperature and drought”
t0“wheat”
e1“well‐watered conditions”
e2“T opt for V cmax was up to 40°C under well‐watered conditions”
e3“The decrease in photosynthesis under drought varied among T growth”
e4“The temperature response of photosynthetic quantum yield under drought was partly attributed to photorespiration”
e5“both diffusional and biochemical parameters of photosynthesis and their thermal sensitivity acclimate little to T growth”
Title
Liang Fang; Pierre Martre; Kaining Jin; et al. Global Change Biology 2022. doi:10.1111/gcb.16488
Other claims from this paper (16)
- Observation Wheat photosynthesis acclimated more to drought than to growth temperature.
- Intervention effect Drought lowered the optimum temperature of wheat photosynthesis.
- Intervention effect Drought lowered wheat light‐saturated net photosynthesis at the photosynthetic optimum.
- Intervention effect Drought lowered wheat stomatal conductance at the photosynthetic optimum.
- Intervention effect Drought lowered wheat mesophyll conductance at the photosynthetic optimum.
- Intervention effect Drought lowered wheat maximum rate of electron transport ( J max ) at the photosynthetic optimum.
- Intervention effect Drought lowered wheat maximum rate of carboxylation by Rubisco ( V cmax ) at the photosynthetic optimum.
- Observation Optimum temperature for wheat V cmax reached 40°C when well watered.
- Observation Optimum temperature for wheat V cmax was 24–34°C under drought.
- Association The decrease in wheat photosynthesis under drought varied with growth temperature.
- Observation The drought decrease in wheat photosynthesis was similar across genotypes.
- Mechanism Photorespiration partly explained the temperature response of wheat photosynthetic quantum yield under drought.
- Mechanism Alternative electron transport explained more of the wheat quantum yield response under drought.
- Mechanism Changed wheat leaf nitrogen did not fully explain the biochemical parameter changes.
- Observation Wheat diffusional and biochemical photosynthesis parameters acclimated little to growth temperature.
- Observation Wheat photosynthetic parameters acclimated considerably to drought and combined drought and growth temperature.