Claim · model-written summary
Nitrogen fixation was adversely affected only when ineffective-strain infection reduced total nodule mass.
- Taxon
- soybean
Glycine maxt0 - Interactor
- ineffective straine0symbiont
- Outcome
- N 2 fixatione0
- Direction
- deleteriouse0
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“soybean”
e0“There was a deleterious effect on N 2 fixation only when infection by the ineffective strain was great enough to reduce total nodule mass.”
Title
Compensation against Ineffective Nodulation in Soybean1
P. W. Singleton; K. R. Stockinger Crop Science 1983. doi:10.2135/cropsci1983.0011183x002300010019x
Other claims from this paper (10)
- Association Shoot total nitrogen rose significantly as the proportion of nodules formed by effective CC709 rose.
- Association Shoot total nitrogen rose significantly as the number of CC709 nodules rose.
- Association Shoot nitrogen was highly correlated with nitrogenase activity.
- Association Shoot nitrogen was highly correlated with nodule mass.
- Association The relation between percent effective nodules and shoot nitrogen was nonlinear.
- Observation Soybean obtained 95% of maximum nitrogen accumulation when only 75% of nodules were effective.
- Association Effective nodules averaged at least 2.5 times the size of ineffective nodules.
- Association Effective nodule weight increased from 2.38 to 4.88 mg per nodule as effective nodule proportion fell.
- Association The effective fraction of total nodule tissue exceeded the percentage of effective nodules.
- Mechanism Compensation tended to maintain effective nodule tissue despite declining effective nodule proportion.