Binds RNA. Regulates responses to abscisic acid (ABA). Promotes stomata closure in drought conditions. Involved in resistance to salt and drought stresses via the accumulation of Pro. Expressed in seedlings, leaves, roots, inflorescences, and siliques (PubMed:25783413). Constitutively expressed in seedlings and roots (PubMed:11905967). In leaves, especially present in stomata guard cells. In reproductive organs, expressed in pollen grains and tubes of germinating pollen, as well as in funiculi attaching seeds to siliques. By abscisic acid (ABA), and osmotic stress (e.g. polyethylene glycol PEG). Slight transient repression by salt (NaCl). Larger rosettes and delayed flowering in long days (16 h of light/8 h of darkness). Higher sensitivity to salt (NaCl). Hypersensitivity to the presence of abscisic acid (ABA). Belongs to the RGGA protein family.