The submergence tolerance regulator SUB1A mediates crosstalk between submergence and drought tolerance in XXXX .

@entity2700 @entity9635 @entity26 @entity1735 @entity579 @entity1786
Submergence and drought are major constraints to @entity579 ( @entity579 ) production in rain-fed farmlands, both of which can occur sequentially during a single crop cycle. SUB1A, an ERF transcription factor found in limited @entity579 accessions, dampens @entity1786 production and @entity9635 responsiveness during submergence, economizing @entity1735 reserves and significantly prolonging endurance. Here, we evaluated the functional role of SUB1A in acclimation to @entity2700 . Comparative analysis of genotypes with and without SUB1A revealed that SUB1A enhanced recovery from drought at the vegetative stage through reduction of leaf water loss and lipid peroxidation and increased expression of genes associated with acclimation to @entity2700 . Overexpression of SUB1A augmented ABA responsiveness, thereby activating stress-inducible gene expression. Paradoxically, vegetative tissue undergoes @entity2700 upon desubmergence even though the soil contains sufficient water, indicating that leaf desiccation occurs in the natural progression of a flooding event. Desubmergence caused the upregulation of gene transcripts associated with acclimation to @entity2700 , with higher induction in SUB1A genotypes. SUB1A also restrained accumulation of reactive @entity26 species (ROS) in aerial tissue during drought and desubmergence. Consistently, SUB1A increased the abundance of transcripts encoding ROS scavenging enzymes, resulting in enhanced tolerance to oxidative stress. Therefore, in addition to providing robust submergence tolerance, SUB1A improves survival of rapid @entity2700 following desubmergence and water deficit during drought.
