NAC1 — Phaseolus vulgaris

Summary

PvNAC1 (PHAVU_005G055400) on chromosome 5 of French bean encodes a NAC-domain transcription factor with sequence-specific DNA binding and homodimerization activity. It is associated with the regulation of leaf senescence, endosperm development, xylem development, and cell wall modification during multidimensional cell growth. The gene has been linked to nitrogen fixation, ethylene, gibberellic acid, auxin, and abscisic acid signaling pathways, as well as salinity and thirst responses. It localizes to the nucleus, cytoplasm, and endoplasmic reticulum. PvNAC1 is associated with traits including leaf size and length, root architecture (adventitious, lateral, and root hair development), shoot growth angle, flowering time, seed germination, salt tolerance, and abiotic stress responses. Related genes in other species connect the family to leaf senescence, xylem vessel formation, and stress resistance.