Claim · model-written summary
Authors tentatively attributed the 15 °C optimum to net photosynthesis balanced primarily by photorespiration.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Verbatim
e0“the 15 °C temperature optimum was that of net photosynthesis in which photosynthesis was primarily balanced by photorespiration in wheat”
t0“Marquis wheat”
Title
Growth kinetics of Marquis wheat. IV. Temperature dependence
F. D. H. Macdowall Canadian Journal of Botany 1973. doi:10.1139/b73-091
Other claims from this paper (15)
- Observation Computed maximum plant growth coefficient was highest at 25 °C.
- Observation At experimental light intensities, plant growth coefficient was maximal at 15 °C.
- Observation Root growth coefficient peaked at 25 °C.
- Observation Stem growth coefficient peaked at 25 °C.
- Association The 25 °C optimum shifted downward as light intensity decreased.
- Observation Leaf-blade growth coefficient peaked at 15 °C.
- Observation Leaf-blade maximum growth coefficient also had a secondary maximum at 25°.
- Observation At low light intensities only the 15 °C leaf-blade peak was evident.
- Mechanism Authors tentatively attributed the 25 °C optimum to net translocation.
- Mechanism Organ growth differences represented relative sink strengths depending on light and temperature.
- Mechanism Photosynthate availability was considered the dominant factor in growth kinetics without inorganic limits.
- Mechanism With little photosynthate, tissues benefited from translocation on a first-come basis.
- Observation The absolute maximum growth coefficient approached 0.5 or 50% per day.
- Association Computed efficiency of photosynthate use for growth depended on temperature.
- Observation At optimum temperature, computed efficiency was similar to previous estimates.