Singlet oxygen induces cell wall thickening and stomatal density reducing by transcriptome reprogramming.

ABSTRACT: Singlet oxygen (¹O₂) has a very short half-life of 10^-5 s; however, it is a strong oxidant that causes growth arrest and necrotic lesions on plants. Its signaling pathway remains largely unknown. The Arabidopsis flu (fluorescent) mutant accumulates a high level of ¹O₂ and shows drastic changes in nuclear gene expression. Only two plastid proteins, EX1 (executer 1) and EX2 (executer 2), have been identified in the singlet oxygen signaling. Here, we found that the transcription factor abscisic acid insensitive 4 (ABI4) binds the promoters of genes responsive to ¹O₂-signals. Inactivation of the ABI4 protein in the flu/abi4 double mutant was sufficient to compromise the changes of almost all ¹O₂-

SUBMITTER: Zhang ZW 

PROVIDER: S-EPMC10731243 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature