Relationship between auto-regulation and nitrate inhibition of nodulation in soybeans

Day, David A., Carroll, Bernard J., Delves, Angela C. and Gresshoff, Peter M. (1989) Relationship between auto-regulation and nitrate inhibition of nodulation in soybeans. Physiologia Plantarum, 75 1: 37-42. doi:10.1111/j.1399-3054.1989.tb02060.x


Author Day, David A.
Carroll, Bernard J.
Delves, Angela C.
Gresshoff, Peter M.
Title Relationship between auto-regulation and nitrate inhibition of nodulation in soybeans
Journal name Physiologia Plantarum   Check publisher's open access policy
ISSN 0031-9317
1399-3054
Publication date 1989-01-01
Sub-type Article (original research)
DOI 10.1111/j.1399-3054.1989.tb02060.x
Volume 75
Issue 1
Start page 37
End page 42
Total pages 6
Place of publication Malden, MA, United States
Publisher Wiley-Blackwell Publishing
Language eng
Abstract Ten of 11 supernodulating mutants of soybean [Glycine max (L.) Merr.] cv. Bragg, in which nodulation was far in excess of that in the wild type, showed pronounced tolerance of nodulation to applied nitrate. Mutant nts (nitrate-tolerant symbiosis) 1116 had an intermediate nodulation response and also showed some inhibition by nitrate. Mutant 1029, a revertant of nts382 (an extreme supernodulator), showed a wild-type nodulation pattern and was equally sensitive to nitrate as cv. Bragg. Grafting experiments with cv. Bragg and nts382 indicated that both supernodulation and tolerance of nodulation to nitrate were dependent on shoot factors. Total leaf nitrate reductase (EC 1.6.6.1 and EC 1.6.6.2) activity of the supernodulating mutants was similar to that in cv. Bragg. We conclude from these results that the inhibitory effect of nitrate on nodule initiation and development in soybean depends on an interaction between nitrate and the autoregulation singal. In the supernodulating mutants, the autoregulation signal is either altered or absent and cosequently nodulation in these mutants is not sensitive to nitrate.
Keyword Autoregulation
Glycine max
Nitrate
Nitrogen fixation
Supernodulating soybean mutants
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Article first published online: 28 April 2006.

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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