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Article

OPEN STOMATA 1 activates SLAC1 anion channel primarily through CPK15 in ABA-induced stomatal closure in Arabidopsis.

Proceedings of the National Academy of Sciences of the United States of America - 25 Nov 2025

Shen Xin, Yin Kaili, Wang Zhiyu, Zhang Zhiwei, Liu Mengqing, Luo Sheng, Xue Shaowu, Hu Honghong

Abstract excerpt

The Ca2+-independent OST1 and Ca2+-dependent protein kinases CPKs both activate the anion channel SLAC1 during ABA-induced stomatal closure pathway. However, the mechanism by which OST1 regulates SLAC1 activation and its relationship with CPKs remain unclear. Here, we identify that OST1 primarily activates SLAC1 in this process through CPK15. Mutation of CPK15 significantly impairs ABA-induced stomatal closure...

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Identifiers

PMID: 41264247
DOI: 10.1073/pnas.2518134122
PMCID: PMC12664010

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OPEN STOMATA 1 activates SLAC1 anion channel primarily through CPK15 in ABA-induced stomatal closure in Arabidopsis.PMID 41264247Read ↗

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