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ABA-Activated SnRK2 Protein Kinase is Required for Dehydration Stress Signaling in Arabidopsis
Plant and Cell Physiology
Protein phosphorylation has pivotal roles in ABA and osmotic stress signaling in higher plants. Two protein phosphatase genes, ABI1 and ABI2, are known to regulate these signaling pathways in Arabidopsis. The identity of ABAactivated protein kinases required for the ABA signaling, however, remains to be elucidated. Here we demonstrate that two protein kinases, p44 and p42, were activated by ABA in Arabidopsis T87 cultured cells, and at least one protein kinase, p44, was activated not only bydoi:10.1093/pcp/pcf188 pmid:12514244 fatcat:t4r7diuavbgslm4cespdiggooy