Abstract
In a split-root system of soybeans (Glycine max L. Merr), inoculation of one half-side suppressed subsequent development of nodules on the opposite side. At zero time, the first side of the split-root system of soybeans received Rhizobium japonicum strain USDA 138 as the primary inoculum. At selected time intervals, the second side was inoculated with the secondary inoculum, a mixture of R. japonicum strain USDA 138 and strain USDA 110. In a short-day season, nodulation by the secondary inoculum was inhibited 100% when inoculation was delayed 10 days. Nodulation on the second side was significantly suppressed when the secondary inoculum was delayed for only 96 hours. In a long-day season, nodule suppression on the second side was highly significant, but not always 100%. Nodule suppression on the second side was not related to the appearance of nodules or nitrogenase activity on the side of split-roots which were inoculated at zero time. When the experiments were done under different light intensities, nodule suppression was significantly more pronounced in the shaded treatments.
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Claims 6
Claim · model-written summary
Prior inoculation of one soybean root half suppressed later nodules on the other half.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- inoculation of one half-sidee0
- Interactor
- Rhizobium japonicume1symbiont
- Outcome
- development of nodules on the opposite sidee0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a split-root system of soybeans (Glycine max L. Merr), inoculation of one half-side suppressed subsequent development of nodules on the opposite side.”
e1“Rhizobium japonicum strain USDA 138 as the primary inoculum”
Claim · model-written summary
Delayed secondary inoculation inhibited nodulation completely after 10 days in a short-day season.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- inoculation was delayed 10 dayse0
- Interactor
- R. japonicume1symbiont
- Outcome
- nodulation by the secondary inoculume0
- Direction
- inhibitede0
- Value
- 100%e0
- Setting
- short-day seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a short-day season, nodulation by the secondary inoculum was inhibited 100% when inoculation was delayed 10 days.”
e1“the secondary inoculum, a mixture of R. japonicum strain USDA 138 and strain USDA 110.”
t0“Soybeans”
Claim · model-written summary
A delay of 96 hours significantly suppressed nodulation on the second root half.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- secondary inoculum was delayed for only 96 hourse0
- Outcome
- Nodulation on the second sidee0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodulation on the second side was significantly suppressed when the secondary inoculum was delayed for only 96 hours.”
t0“Soybeans”
Claim · model-written summary
Second-side nodulation was significantly suppressed in a long-day season, though not always completely.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- nodule suppression on the second sidee0
- Qualifier
- not always 100%e0
- Setting
- long-day seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a long-day season, nodule suppression on the second side was highly significant, but not always 100%.”
t0“Soybeans”
Claim · model-written summary
Second-side nodule suppression was unrelated to first-side nodule appearance or nitrogenase activity.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- Nodule suppression on the second sidee0
- Direction
- not relatede0
- Comparator
- appearance of nodules or nitrogenase activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nodule suppression on the second side was not related to the appearance of nodules or nitrogenase activity on the side of split-roots which were inoculated at zero time.”
t0“Soybeans”
Claim · model-written summary
Shading made nodule suppression significantly more pronounced.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- shaded treatmentse0
- Outcome
- nodule suppressione0
- Direction
- more pronouncede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nodule suppression was significantly more pronounced in the shaded treatments.”
t0“Soybeans”
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inoculation · symbiosis · Glycine max (soybean)Positive and negative results
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