In:
Crop Science, Wiley, Vol. 23, No. 3 ( 1983-05), p. 453-456
Abstract:
The effects of two mutant strains of Rhizobium japonicum with enhanced capacities N 2 fixation, on ureide transport, photosynthesis,root respiration, and growth in soybeans [ Glycine max (L.) Merr. ‘Wells’] were examined during vegetative growth. Three‐week‐old plants inoculated with the mutants were larger and had higher rates of acetylene reduction, photosynthesis, xylary ureide transport, leaf allantoinase activity and higher concentrations of ureides in shoot tissues than did plants inoculated with the wild‐type strain. The relative composition of xylem sap N was unaffected by Rhizobium strain. Ureides comprised over 90% of the sap N in all treatments. After 5 weeks growth, however, there were no statistically significant differences among treatments in rates of the physiological processes and growth parameters examined. Cross contamination of nodules containing the mutant strains with the wild‐type strain was not responsible for the apparent loss of the initial advantages to the host plant (in terms of N 2 fixation and growth) brought about by the use of the mutant strains. The use of modifications in Rhizobium genetics for improving the dependency of the host plant on N 2 fixation for its N requirements is briefly discussed.
Type of Medium:
Online Resource
ISSN:
0011-183X
,
1435-0653
DOI:
10.2135/cropsci1983.0011183X002300030003x
Language:
English
Publisher:
Wiley
Publication Date:
1983
detail.hit.zdb_id:
1480918-7
