Abstract
Seven supernodulation mutants of soybean (Glycine max) derived from the cultivar Bragg were investigated for shoot control of the supernodulation response. Reciprocal grafts showed that supernodulation in all lines tested was obtained only if the genotype of the shoot was homozygous for the mutant allele(s). In addition two lines of Korean origin (selected in the field for increased nitrate tolerance) were included in the grafting studies. Under our experimental conditions nitrate tolerance could not be demonstrated in the Korean cultivars. Grafts gave near-control levels of nodulation, suggesting that the genetic basis of nitrate tolerance and increased nodulation in the Korean lines is different from that seen in the induced mutants of Bragg. The data suggest that, contrary to earlier reports with pea (Pisum sativum) mutants, no root control of supernodulation could be demonstrated. Furthermore the results point to a possible novel regulatory system governing nodule numbers and patterning which involves an intertissue transfer of a chemical signal.
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Claims 6
Claim · model-written summary
Reciprocal grafts showed supernodulation in all tested soybean mutant lines occurred only when the shoot genotype was homozygous for the mutant allele(s).
- Taxon
- Soybeans
Glycine maxt0 - Outcome
- supernodulation in all lines tested was obtained only if the genotype of the shoot was homozygous for the mutant allele(s)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reciprocal grafts showed that supernodulation in all lines tested was obtained only if the genotype of the shoot was homozygous for the mutant allele(s)”
t0“Soybeans”
Claim · model-written summary
Nitrate tolerance could not be demonstrated in the Korean soybean cultivars under the experimental conditions.
- Taxon
- SoybeansGlycine maxt0
- Material
- Korean cultivarse0
- Outcome
- nitrate tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under our experimental conditions nitrate tolerance could not be demonstrated in the Korean cultivars”
t0“Soybeans”
Claim · model-written summary
Grafts gave near-control levels of nodulation.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- nodulatione0
- Qualifier
- near-control levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grafts gave near-control levels of nodulation”
t0“Soybeans”
Claim · model-written summary
The authors suggest the genetic basis of nitrate tolerance and increased nodulation in the Korean lines differs from that in the induced Bragg mutants.
- Taxon
- SoybeansGlycine maxt0
- Material
- Korean linese0
- Outcome
- genetic basis of nitrate tolerance and increased nodulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the genetic basis of nitrate tolerance and increased nodulation in the Korean lines is different from that seen in the induced mutants of Bragg”
t0“Soybeans”
Claim · model-written summary
No root control of supernodulation could be demonstrated in the soybean mutants.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- no root control of supernodulation could be demonstratede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no root control of supernodulation could be demonstrated”
t0“Soybeans”
Claim · model-written summary
The results point to a possible novel regulatory system governing nodule numbers and patterning that involves intertissue transfer of a chemical signal.
- Taxon
- SoybeansGlycine maxt0
- Compound
- chemical signale0
- Outcome
- nodule numbers and patterninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a possible novel regulatory system governing nodule numbers and patterning which involves an intertissue transfer of a chemical signal”
t0“Soybeans”