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Title: Blue light and CO2 signals converge to regulate light-induced stomatal opening
Authors: Hiyama, Asami
Takemiya, Atsushi
Munemasa, Shintaro
Okuma, Eiji
Sugiyama, Naoyuki  kyouindb  KAKEN_id  orcid (unconfirmed)
Tada, Yasuomi
Murata, Yoshiyuki
Shimazaki, Ken-ichiro
Author's alias: 樋山, 麻美
武宮, 淳史
宗正, 晋太郎
杉山, 直幸
多田, 安臣
村田, 芳行
島崎, 研一郎
Keywords: Light responses
Plant signalling
Issue Date: 3-Nov-2017
Publisher: Springer Nature
Journal title: Nature Communications
Volume: 8
Thesis number: 1284
Abstract: Stomata regulate gas exchange between plants and atmosphere by integrating opening and closing signals. Stomata open in response to low CO2 concentrations to maximize photosynthesis in the light; however, the mechanisms that coordinate photosynthesis and stomatal conductance have yet to be identified. Here we identify and characterize CBC1/2 (CONVERGENCE OF BLUE LIGHT (BL) AND CO2 1/2), two kinases that link BL, a major component of photosynthetically active radiation (PAR), and the signals from low concentrations of CO2 in guard cells. CBC1/CBC2 redundantly stimulate stomatal opening by inhibition of S-type anion channels in response to both BL and low concentrations of CO2. CBC1/CBC2 function in the signaling pathways of phototropins and HT1 (HIGH LEAF TEMPERATURE 1). CBC1/CBC2 interact with and are phosphorylated by HT1. We propose that CBCs regulate stomatal aperture by integrating signals from BL and CO2 and act as the convergence site for signals from BL and low CO2.
Description: 青色光と二酸化炭素による気孔開閉運動を制御する分子機構の解明. 京都大学プレスリリース. 2017-12-05.
Rights: © The Author(s) 2017. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
DOI(Published Version): 10.1038/s41467-017-01237-5
PubMed ID: 29101334
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