Claim · model-written summary
Under sufficient phosphorus, CO2 enrichment raised nitrogenase activity by 58%.
- Taxon
- soybean
Glycine maxt0 - Treatment
- CO2 enrichmente0
- Outcome
- total nitrogenase activitye0
- Direction
- increasede0
- Value
- 58%e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“CO2 enrichment significantly increased whole plant dry mass (83%), nodule mass (67%), total nitrogenase activity (58%)”
t0“soybean”
Title
Tongmin Sa; Daniel W. Israel Journal of Plant Nutrition 1998. doi:10.1080/01904169809365555
Other claims from this paper (11)
- Intervention effect Under sufficient phosphorus, CO2 enrichment raised soybean dry mass by 83%.
- Intervention effect Under sufficient phosphorus, CO2 enrichment raised nodule mass by 67%.
- Intervention effect Under sufficient phosphorus, CO2 enrichment raised nitrogen accumulation by 35%.
- Intervention effect Under sufficient phosphorus, CO2 enrichment raised phosphorus accumulation by 47%.
- Intervention effect Under sufficient phosphorus, CO2 enrichment increased nodule starch concentration.
- Intervention effect At normal CO2, phosphorus deficiency increased leaf nonstructural carbohydrate concentration.
- Intervention effect Under phosphorus deficiency, CO2 enrichment did not enhance dry mass, fixation parameters or nutrient accumulation.
- Intervention effect Phosphorus deficiency decreased nodule carbohydrate accumulation by 86%.
- Intervention effect Phosphorus deficiency raised leaf nonstructural carbohydrate concentration.
- Intervention effect Phosphorus deficiency lowered nodule nonstructural carbohydrate concentration.
- Mechanism The missing fixation response under phosphorus deficiency may relate to reduced nodule carbohydrate status.