ALMT12 interacts with and inhibits SLAC1 to modulate stomatal movements and enhance plant biomass
Year: 2025
Type: article
Abstract: Stomata are pores that control carbon dioxide (CO2) and water exchange by modulating their aperture in response to different environmental and internal signals. The Slow-type SLOW ANION CHANNEL-ASSOCIATED 1 (SLAC1) and Rapid-type ALUMINUM-ACTIVATED MALATE TRANSPORTER 12 (ALMT12) anion channels mediate anion efflux in guard cells to promote stomatal closure. These channels were previously thought to function as 2 independent anion-permeable pores differing in their activation kinetics, voltage dependence, and anion selectivity. In this study, we found that ALMT12 interacts with and represses SLAC1 anion permeability in Xenopus oocytes and Arabidopsis (Arabidopsis thaliana) guard cells. This channel-channel regulatory mechanism modulates stomatal movements under high CO2 conditions and enhances plant biomass.
Source: PLANT PHYSIOLOGY
Authors: Ping Lin, Hui Zhou, Qing Zhao, Liumei Li, Jiamei Liu, Zhuoran Hu, Yunxin Luo, Cuizhu Feng, Yu Long
Institution: Henan University
Language: English
Subfield: Plant Science
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $3,851
Award: G999260450
OpenAlex ID: W4414619604