The BIG protein distinguishes the process of CO 2 -induced stomatal closure from the inhibition of stomatal opening by CO 2 .

Autor: He J; State Key Laboratory of Hybrid Rice, Department of Plant Sciences, College of Life Sciences, Wuhan University, Wuhan, 430072, China., Zhang RX; State Key Laboratory of Hybrid Rice, Department of Plant Sciences, College of Life Sciences, Wuhan University, Wuhan, 430072, China., Peng K; School of Biological Sciences, Life Sciences Building, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK., Tagliavia C; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK., Li S; State Key Laboratory of Hybrid Rice, Department of Plant Sciences, College of Life Sciences, Wuhan University, Wuhan, 430072, China., Xue S; College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China., Liu A; Cell and Developmental Biology Section, Division of Biological Sciences, University of California at San Diego, La Jolla, CA, 92093, USA., Hu H; College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.; Cell and Developmental Biology Section, Division of Biological Sciences, University of California at San Diego, La Jolla, CA, 92093, USA., Zhang J; Cell and Developmental Biology Section, Division of Biological Sciences, University of California at San Diego, La Jolla, CA, 92093, USA., Hubbard KE; Cell and Developmental Biology Section, Division of Biological Sciences, University of California at San Diego, La Jolla, CA, 92093, USA.; School of Environmental Sciences, University of Hull, Hull, HU6 7RX, UK., Held K; Institut für Biologie und Biotechnologie der Pflanzen, Universität Münster, Schlossplatz 7, Münster, 48149, Germany., McAinsh MR; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK., Gray JE; Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank, Sheffield, S10 2TN, UK., Kudla J; Institut für Biologie und Biotechnologie der Pflanzen, Universität Münster, Schlossplatz 7, Münster, 48149, Germany., Schroeder JI; Cell and Developmental Biology Section, Division of Biological Sciences, University of California at San Diego, La Jolla, CA, 92093, USA., Liang YK; State Key Laboratory of Hybrid Rice, Department of Plant Sciences, College of Life Sciences, Wuhan University, Wuhan, 430072, China., Hetherington AM; School of Biological Sciences, Life Sciences Building, 24 Tyndall Avenue, Bristol, BS8 1TQ, UK.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2018 Apr; Vol. 218 (1), pp. 232-241. Date of Electronic Publication: 2018 Jan 02.
DOI: 10.1111/nph.14957
Abstrakt: We conducted an infrared thermal imaging-based genetic screen to identify Arabidopsis mutants displaying aberrant stomatal behavior in response to elevated concentrations of CO 2 . This approach resulted in the isolation of a novel allele of the Arabidopsis BIG locus (At3g02260) that we have called CO 2 insensitive 1 (cis1). BIG mutants are compromised in elevated CO 2 -induced stomatal closure and bicarbonate activation of S-type anion channel currents. In contrast with the wild-type, they fail to exhibit reductions in stomatal density and index when grown in elevated CO 2 . However, like the wild-type, BIG mutants display inhibition of stomatal opening when exposed to elevated CO 2 . BIG mutants also display wild-type stomatal aperture responses to the closure-inducing stimulus abscisic acid (ABA). Our results indicate that BIG is a signaling component involved in the elevated CO 2 -mediated control of stomatal development. In the control of stomatal aperture by CO 2 , BIG is only required in elevated CO 2 -induced closure and not in the inhibition of stomatal opening by this environmental signal. These data show that, at the molecular level, the CO 2 -mediated inhibition of opening and promotion of stomatal closure signaling pathways are separable and BIG represents a distinguishing element in these two CO 2 -mediated responses.
(© 2018 The Authors. New Phytologist © 2018 New Phytologist Trust.)
Databáze: MEDLINE
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