GmSPX8, a nodule-localized regulator confers nodule development and nitrogen fixation under phosphorus starvation in soybean.

ABSTRACT:

Background

Biological nitrogen fixation (BNF) is an important nitrogen source for legume plants, and highly efficient nitrogen fixation requires sufficient phosphorus (P). However, the mechanism of maintaining nitrogen fixation of the legume nodules under low P concentration remains largely unknown.

Results

A nodule-localized SPX protein, GmSPX8, was discovered by transcriptome and functional analysis of its role in N₂ fixation was characterized in soybean nodules. GmSPX8 was preferentially expressed in nodules and its expression was gradually increased during nodule development. And also the expression pattern was investigated using reporter gene β-glucuronidase (GUS) driven by the promoter of GmSPX8. GmSPX8 was greatly induced and the GUS activity was increased

SUBMITTER: Xing X 

PROVIDER: S-EPMC8973899 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature