Claim · model-written summary
Uninoculated soybean plants did not nodulate.
- Taxon
- soybean
Glycine maxt0 - Outcome
- did not nodulatee1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e1“Uninoculated plants did not nodulate”
Title
DF Herridge; RJ Roughley; J Brockwell Australian Journal of Agricultural Research 1984. doi:10.1071/ar9840149
Other claims from this paper (14)
- Intervention effect Increasing inoculant rates gave greater numbers of rhizobia in the rhizosphere and in the soil.
- Intervention effect Increasing inoculant rates improved nodulation of soybean.
- Intervention effect High soil nitrate (30 ug N/g, top 30 cm) did not prevent prompt, abundant colonization of rhizospheres by the inoculant bacteria.
- Intervention effect High soil nitrate delayed nodule initiation and retarded nodule development until 42 days after sowing.
- Association Nodule formation and development accelerated between 42 and 62 days, coinciding with depletion of soil nitrate from the top 60 cm.
- Observation Nodulated and unnodulated soybeans took up nitrate at similar times and rates to a soil depth of 90 cm.
- Observation Only unnodulated soybean plants used soil nitrate below 90 cm.
- Observation The initial increase in xylem ureide concentrations coincided with the period of accelerated nodule formation between 42 and 62 days.
- Association In nodulated plants ureide concentrations increased progressively and were related to inoculation rate, extent of nodulation and the decline in soil nitrate.
- Observation Ureide concentrations in unnodulated plants remained low throughout.
- Association Amounts of nitrate-N and beta-amino-N in xylem sap were not related to nodulation.
- Observation Differences between treatments in whole-plant N and grain N were less than predicted from the symbiotic parameters.
- Mechanism The authors infer that soybeans compensated for symbiotic deficiencies by more efficient exploitation of soil N and/or more efficient redistribution of vegetative N into grain N.
- Observation The authors conclude that nodulation and soil nitrate were interactive and complementary in meeting the crop nitrogen requirements.