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식물 노화·수명 연구단
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L-Met Activates Arabidopsis GLR Ca2+ Channels Upstream of ROS Production and Regulates Stomatal Movement

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Title
L-Met Activates Arabidopsis GLR Ca2+ Channels Upstream of ROS Production and Regulates Stomatal Movement
Author(s)
Dongdong Kong; Heng-Cheng Hu; Eiji Okuma; Yuree Lee; Hui Sun Lee; Shintaro Munemasa; Daeshik Cho; Chuanli Ju; Leah Pedoeim; Barbara Rodriguez; Jung Wang; Wonpil Im; Yoshiyumi Murata; Zhen-Ming Pei; June M. Kwak
Publication Date
2016-12
Journal
CELL REPORTS, v.17, no.10, pp.2553 - 2561
Publisher
Cell Press
Abstract
Plant glutamate receptor homologs (GLRs) have long been proposed to function as ligand-gated Ca2+ channels, but no in planta evidence has been provided. Here, we present genetic evidence that Arabidopsis GLR3.1 and GLR3.5 form Ca2+ channels activated by L-methionine (L-Met) at physiological concentrations and regulate stomatal apertures and plant growth. The glr3.1/3.5 mutations resulted in a lower cytosolic Ca2+ level, defective Ca2+-induced stomatal closure, and Ca2+-deficient growth disorder, all of which involved L-Met. Patch-clamp analyses of guard cells showed that GLR3.1/3.5 Ca2+ channels are activated specifically by L-Met, with the activation abolished in glr3.1/3.5. Moreover, GLR3.1/3.5 Ca2+ channels are distinct from previously characterized ROS-activated Ca2+ channels and act upstream of ROS, providing Ca2+ transients necessary for the activation of NADPH oxidases. Our data indicate that GLR3.1/3.5 constitute L-Metactivated Ca2+ channels responsible for maintaining basal [Ca2+]cyt, play a pivotal role in plant growth, and act upstream of ROS, thereby regulating stomatal aperture. (c) 2016 Institute for Basic Science / DGIST.
URI
http://pr.ibs.re.kr/handle/8788114/3154
DOI
10.1016/j.celrep.2016.11.015
ISSN
2211-1247
Appears in Collections:
Center for Plant Aging Research (식물 노화·수명 연구단) > Journal Papers (저널논문)
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