Molecular basis of environmental stress response mechanism mediated by plant receptor-like proteins

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Overproduction of a receptor-like kinase(RLK), RPK1, in the transgenic Arabidopsis plants enhanced tolerance to drought and oxidative stresses. Our data suggested that RPK1 functions on the adaptive mechanisms to the complex stressful environment. The cysteine-rich repeat RLK, CRK36, is a novel factor, which negatively controls the responses to osmotic stress and abscisic acid. CRK36 forms a receptor complex with a receptor-like cytosolic kinase, ARCK1, and they negatively regulate the expression of ABA-responsive transcription factors, ABI4 and ABI5.