Soybean (Glycine max (L.) Merr.); nodulation mutant characterization: Role of isoflavonoid, nitrate, and abscisic acid in nodulation control

Isoflavonoids (daidzein, genistein, and coumestrol) are known to be inducers of nod genes in Bradyrhizobium japonicum. This study evaluated the effect of inoculation and nitrogen on isoflavonoid concentration in soybean (Glycine max (L.) Merr.) root extracts from selected hypernodulating mutants (NOD1-3, NOD2-4, and NOD3-7), a nonnodulating mutant (NN5), and the Williams parent. There were no significant differences in isoflavonoid concentrations of root extracts among lines when plants were not inoculated, while all mutants had higher isoflavonoid concentrations at 12 days after inoculation than did the Williams control when plants were inoculated. Nitrogen (urea, (NH$\sb4)\sb2$SO$\sb4$, and NO$\sb3\sp-$) application markedly decreased isoflavonoid concentrations in all soybean lines, with NO$\sb3\sp-$ being most inhibitory.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Crop Sciences

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Cho, Myeong-Je

Contributors dc:contributor

• Harper, James E.

• Agriculture, Agronomy
• Agriculture, Plant Pathology
• Chemistry, Biochemistry

Statement dc:rights

• Copyright 1991 Cho, Myeong-Je

Language dc:language

eng

Identifier

AAI9136568
(UMI)AAI9136568

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/20832