Claim · model-written summary
Acetylene reduction had a sharp optimum between flooded and severely dry soil.
- Taxon
- Soybean
Glycine maxt0 - Outcome
- acetylene reductione0
- Direction
- sharp optimume0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Between these extremes, acetylene reduction displayed a sharp optimum”
t0“Soybean”
Title
Chi-Ying Huang; John S. Boyer; Larry N. Vanderhoef PLANT PHYSIOLOGY 1975. doi:10.1104/pp.56.2.222
Other claims from this paper (12)
- Method / resource The apparatus measured nodule acetylene reduction and shoot gas exchange simultaneously.
- Observation Acetylene reduction was linear for at least five hours except initially.
- Method / resource Endogenous ethylene did not affect measurements.
- Method / resource Repeated acetylene reduction measurements had no apparent aftereffects.
- Intervention effect Acetylene reduction was undetectable in flooded soil and at severe desiccation.
- Intervention effect Acetylene reduction was undetectable at a soil water potential of -19.5 bars.
- Intervention effect Removing soil eliminated flooding inhibition.
- Mechanism Gas exchange restriction was proposed to explain flooding inhibition above -2 bars.
- Association Acetylene reduction decreased with further soil drying.
- Association The decrease in acetylene reduction correlated with decreases in photosynthesis and transpiration.
- Observation Dark respiration was inhibited less than the other measured processes.
- Mechanism Photosynthesis, transpiration, or direct nodule effects were proposed to account for nitrogen fixation inhibition below -2 bars.