Dwarf14-like2a gene localized in rice roots on infection of arbuscular mycorrhizal fungus and hydrolysis of rac-GR24 by the encoded protein (Sisaphaithong et al.). Also named STH1, it is an integration hub for salt tolerance and heading date. STH1 regulates hydrolytic degradation of fatty acid, which contributes to salt tolerance. STH1 forms a protein complex with D3 and a vital regulatory factor in salt tolerance, OsHAL3, to affect the protein abundance of OsHAL3 by ubiquitination pathway. STH1 serves as a co-activator of the floral integrator gene Heading date 1 (Hd1) to balance the expression of the florigen gene Heading date 3a (Hd3a) under different circumstances, thus coordinating the regulation of salt tolerance and heading date. The allele of STH1 associated with enhanced salt tolerance and high yield is partially found in African rice, but not in Asian cultivars