Claim · model-written summary
Hydrogenase activity in bacteroids of the two R. meliloti strains was below 0.1% of the R. japonicum comparator.
- Interactor
- R. meliloti
Sinorhizobium melilotie0symbiont - Outcome
- specific activity of hydrogenasee0
- Direction
- less thane0
- Value
- 0.1%e0
- Comparator
- Rhizobium japonicum USDA 110e0
Not reportedTaxonMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleTreatmentSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The specific activity of hydrogenase in bacteroids formed by either strain 102F65 or strain 102F51 of R. meliloti was less than 0.1% of the specific activity of the hydrogenase system in bacteroids formed by H(2) uptake-positive Rhizobium japonicum USDA 110”
Title
Tomás Ruiz-Argüeso; Robert J. Maier; Harold J. Evans Applied and Environmental Microbiology 1979. doi:10.1128/aem.37.3.582-587.1979
Other claims from this paper (8)
- Observation Nodules formed by R. meliloti on alfalfa lost at least 17% of nitrogenase electron flow as hydrogen.
- Observation Nodules formed by R. trifolii on clover lost at least 17% of nitrogenase electron flow as hydrogen.
- Observation Alfalfa nodules formed by 19 R. meliloti strains lost a mean 25% of electron flow as hydrogen.
- Observation Clover nodules formed by seven R. trifolii strains lost a mean 35% of electron flow as hydrogen.
- Observation Only R. meliloti strains 102F65 and 102F51 showed measurable hydrogenase activity while free living.
- Observation Bacteroids from those two strains oxidized hydrogen at low rates.
- Mechanism The tested rhizobia had insufficient hydrogenase to recycle much of the hydrogen evolved from host nodules.
- Recommendation The authors call for developing rhizobial strains with adequate hydrogen recycling.