Arabidopsis AGB1 participates in salinity response through bZIP17-mediated unfolded protein response.

ABSTRACT:

Background

Plant heterotrimeric G proteins respond to various environmental stresses, including high salinity. It is known that Gβ subunit AGB1 functions in maintaining local and systemic Na⁺/K⁺ homeostasis to accommodate ionic toxicity under salt stress. However, whether AGB1 contributes to regulating gene expression for seedling's survival under high salinity remains unclear.

Results

We showed that AGB1-Venus localized to nuclei when facing excessive salt, and the induction of a set of bZIP17-dependent salt stress-responsive genes was reduced in the agb1 mutant. We confirmed both genetic and physical interactions of AGB1 and bZIP17 in plant salinity response by comparing salt responses in the single and double mutants of agb1 and bzip17 and by BiFC as

SUBMITTER: Cho Y 

PROVIDER: S-EPMC11191249 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature