Identification of SLAC1 anion channel residues required for CO₂/bicarbonate sensing and regulation of stomatal movements.

ABSTRACT: Increases in CO₂ concentration in plant leaves due to respiration in the dark and the continuing atmospheric [CO₂] rise cause closing of stomatal pores, thus affecting plant-water relations globally. However, the underlying CO₂/bicarbonate (CO₂/HCO₃^-) sensing mechanisms remain unknown. [CO₂] elevation in leaves triggers stomatal closure by anion efflux mediated via the SLAC1 anion channel localized in the plasma membrane of guard cells. Previous reconstitution analysis has suggested that intracellular bicarbonate ions might directly up-regulate SLAC1 channel activity. However, whether such a CO₂/HCO₃^- regulation of SLAC1 is relevant for CO₂ control of stomatal movements

SUBMITTER: Zhang J 

PROVIDER: S-EPMC6217375 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature