Cell signalling
CPK3/6 mediate ABA guard-cell signaling
Open access · cc by · source: Europe PMC
Calcium-dependent kinases CPK3 and CPK6 act in ABA control of guard-cell anion/Ca²⁺ channels and stomatal closure.
Key findings
Among 34 Arabidopsis CDPKs, CPK3 and CPK6 function in ABA-activated S-type anion and Ca²⁺-permeable channels.
Methodology
Identified guard-cell CDPKs, isolated cpk3/cpk6 mutants, and measured ion-channel and stomatal responses to ABA.
Limitations
Does not map every CDPK substrate in all cell types.
How this study connects
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