miR172 Regulates Soybean Nodulation

Compensation Against Ineffective Nodulation in Soybean

Two cultivars of soybean [Glycine max (L.) Merr.] were inoculated with nine ratios of ineffective (SM-5) and effective (CC709) strains of Rhizobium japonicum. Plants were grown in the greenhouse and harvested after 33 days. Nitrogenase activity, total shoot N, nodule number, nodule mass, and the proportions of nodules formed by each strain were determined. Nodules were identified serologically ...

The high-affinity phosphate transporter GmPT5 regulates phosphate transport to nodules and nodulation in soybean.

Legume biological nitrogen (N) fixation is the most important N source in agroecosystems, but it is also a process requiring a considerable amount of phosphorus (P). Therefore, developing legume varieties with effective N(2) fixation under P-limited conditions could have profound significance for improving agricultural sustainability. We show here that inoculation with effective rhizobial strai...

Autoregulation of Nodulation in Soybean Plants

Soybean miR172c targets the repressive AP2 transcription factor NNC1 to activate ENOD40 expression and regulate nodule initiation.

MicroRNAs are noncoding RNAs that act as master regulators to modulate various biological processes by posttranscriptionally repressing their target genes. Repression of their target mRNA(s) can modulate signaling cascades and subsequent cellular events. Recently, a role for miR172 in soybean (Glycine max) nodulation has been described; however, the molecular mechanism through which miR172 acts...

Discovery and expression analysis of nodulation genes in soybean

Abstract: Soybean develop new root organs that become nitrogen-fixing nodules in response to signals from rhizobacteria and then use complex systemic signalling to control cell proliferation. Recent application of functional genomics resulted in the characterization of genes encoding Leucine rich repeat (LRR) receptor kinases controlling these early nodulation steps. With short and long distanc...