Growth Comparisons of a Supernodulating Soybean (Glycine-Max) Mutant and its Wild-Type Parent

Day, David A., Lambers, Hans, Bateman, Jan, Carroll, Bernard J. and Gresshoff, Peter M. (1986) Growth Comparisons of a Supernodulating Soybean (Glycine-Max) Mutant and its Wild-Type Parent. Physiologia Plantarum, 68 3: 375-382. doi:10.1111/j.1399-3054.1986.tb03368.x


Author Day, David A.
Lambers, Hans
Bateman, Jan
Carroll, Bernard J.
Gresshoff, Peter M.
Title Growth Comparisons of a Supernodulating Soybean (Glycine-Max) Mutant and its Wild-Type Parent
Journal name Physiologia Plantarum   Check publisher's open access policy
ISSN 0031-9317
1399-3054
Publication date 1986-11-01
Sub-type Article (original research)
DOI 10.1111/j.1399-3054.1986.tb03368.x
Volume 68
Issue 3
Start page 375
End page 382
Total pages 8
Place of publication Malden, MA, United States
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
The growth of a supernodulating, nitrate-tolerant soybean [Glycine max (L.) Merr.] mutant nts382 (nitrate-tolerant symbiosis) was compared to that of its wild-type parent, cv. Bragg, over the first 50 days after sowing. Plants were grown either inoculated in the absence of an external nitrogen source or uninoculated in the presence of 5 mM KNO3. For both treatments, nts382 growth up to 13 days after planting was faster than that of cv. Bragg. Thereafter, supernodulation of inoculated nts382 occurred and growth of cv. Bragg was faster; shoot and root dry weight increments and leaf area were greater in cv. Bragg, but the N content of nts382 was higher. Relative growth and net assimilation rates were lower in nts382, which had faster shoot and root respiration rates. Shoot growth of uninoculated plants was similar for both mutant and wild-type but roots of nts382 were slightly smaller than those of cv. Bragg. Total plant N content was similar in uninoculated cv. Bragg and nts382 but the latter had a higher leaf N content. Early lateral root formation (prior to nodule emergence) was greater in nts382 regardless of whether rhizobia or KJNO3 were present. We conclude that nts382 has some inherent differences from its parent but that supernodulation significantly retards plant growth.
Keyword Nitrogen fixation
Nodule number
Plant growth
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

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