MOS4-associated complex contributes to proper splicing and suppression of ER stress under long-term heat stress in Arabidopsis.

ABSTRACT: Plants are often exposed not only to short-term (S-) but also to long-term (L-)heat stress over several consecutive days. A few Arabidopsis mutants defective in L-heat tolerance have been identified, but the molecular mechanisms are less understood for this tolerance than for S-heat stress tolerance. To elucidate the mechanisms of the former, we used a forward genetic screen for sensitive to long-term heat (sloh) mutants and isolated sloh3 and sloh63. The mutants were hypersensitive to L- but not to S-heat stress, and sloh63 was also hypersensitive to salt stress. We identified the causal genes, SLOH3 and SLOH63, both of which encoded splicing-related components of the MOS4-associated complex (MAC). This complex is widely conserved in eukary

SUBMITTER: Endo N 

PROVIDER: S-EPMC10644990 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature