Arabidopsis AtSUC2 and AtSUC4, encoding sucrose transporters, are required for abiotic stress tolerance in an ABA-dependent pathway.

摘要: Sucrose transporters (SUCs or SUTs) play a central role, as they orchestrate sucrose allocation both intracellularly and at the whole plant level. Previously, we found AtSUC4 mutants changing distribution under drought salt stresses. Here, systematically examined role of Arabidopsis AtSUC2 in response to abiotic stress. The results showed significant induction salt, osmotic, low temperature exogenous abscisic acid (ABA) treatments by public microarray data real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) analyses. loss-of-function mutation led hypersensitive responses stress ABA treatment seed germination seedling growth. These also higher content shoots lower roots, compared with that wild-type plants, inhibited ABA-induced expression many stress- ABA-responsive genes, especially ABFs ABF-downstream upstream genes. mutant AtSUC3, unique putative sensor, reduced stresses ABA. findings confirmed are important regulators tolerance use an signaling pathway, which may be crossed signaling.