The malate-activated ALMT12 anion channel in the grass Brachypodium distachyon is co-activated by Ca²⁺/calmodulin.

ABSTRACT: In plants, strict regulation of stomatal pores is critical for modulation of CO₂ fixation and transpiration. Under certain abiotic and biotic stressors, pore closure is initiated through anionic flux, with calcium (Ca²⁺) playing a central role. The aluminum-activated malate transporter 12 (ALMT12) is a malate-activated, voltage-dependent member of the aluminum-activated malate transporter family that has been implicated in anionic flux from guard cells controlling the stomatal aperture. Herein, we report the characterization of the regulatory mechanisms mediating channel activities of an ALMT from the grass Brachypodium distachyon (BdALMT12) that has the highest sequence identity to Arabidopsis thaliana ALMT12. Electrophysiological studies in a heterolog

SUBMITTER: Luu K 

PROVIDER: S-EPMC6463695 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature