Enhances Tolerance to Phosphate Starvation and Salt Stress, and Changes Fertility in Transgenic .

WRKY protein is a unique transcription factor (TF) and plays an important role in the physiological processes of various stress responses and plant development. In this research, we obtained a WRKY TF gene from soybean by homologous cloning, and named it . is a nuclear protein containing a highly conserved WRKY domain and a CH zinc finger structure, and mainly expressed in roots, flowers and pods of soybean.

Soybean SPX1 is an important component of the response to phosphate deficiency for phosphorus homeostasis.

Phosphate (Pi) homeostasis is required for plant growth and development, but the Pi-signaling pathways in plants still remain largely unknown. Proteins only containing the SPX domain are very important in phosphate (Pi) homeostasis and signaling transduction. In the T-DNA insertion Arabidopsis mutant spx3, AtPHT1-4, AtPHT1-5, AtACP5, AtRNS, and AtAT4 expression levels were increased under Pi-sufficient condition and low Pi condition compared with WT.