Bacterial diacetyl suppresses abiotic stress-induced senescence in Arabidopsis

Plant premature senescence is a major reason for agricultural losses caused by abiotic stress. Tools for suppressing stress-induced plant senescence are important but rare. Herein we report that diacetyl, a natural compound emitted by a plant-beneficial bacterium, suppresses ABA-mediated foliar senescence in Arabidopsis thaliana under various abiotic stress conditions. Our results established diacetyl as an effective protector of stress-induced plant senescence and disclosed a molecular mechanism for bacteria-enhanced plant stress-resistance. Examination of effect of microbial factor in alleviating ABA induced leaf senescence