Natural Variation in Arabidopsis Cvi-0 Accession Reveals an Important Role of MPK12 in Guard Cell CO2 Signaling

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Jakobson , L , Vaahtera , L , Tõldsepp , K , Nuhkat , M , Wang , C , Wang , Y-S , Hõrak , H , Valk , E , Pechter , P , Sindarovska , Y , Tang , J , Xiao , C , Xu , Y , Gerst Talas , U , García-Sosa , A T , Kangasjärvi , S , Maran , U , Remm , M , Roelfsema , M R G , Hu , H , Kangasjärvi , J , Loog , M , Schroeder , J I , Kollist , H & Brosché , M 2016 , ' Natural Variation in Arabidopsis Cvi-0 Accession Reveals an Important Role of MPK12 in Guard Cell CO2 Signaling ' , PLoS Biology , vol. 14 , no. 12 , e2000322 . https://doi.org/10.1371/journal.pbio.2000322

Titel: Natural Variation in Arabidopsis Cvi-0 Accession Reveals an Important Role of MPK12 in Guard Cell CO2 Signaling
Författare: Jakobson, Liina; Vaahtera, Lauri; Tõldsepp, Kadri; Nuhkat, Maris; Wang, Cun; Wang, Yuh-Shuh; Hõrak, Hanna; Valk, Ervin; Pechter, Priit; Sindarovska, Yana; Tang, Jing; Xiao, Chuanlei; Xu, Yang; Gerst Talas, Ulvi; García-Sosa, Alfonso T.; Kangasjärvi, Saijaliisa; Maran, Uko; Remm, Maido; Roelfsema, M. Rob G.; Hu, Honghong; Kangasjärvi, Jaakko; Loog, Mart; Schroeder, Julian I.; Kollist, Hannes; Brosché, Mikael
Medarbetare: University of Helsinki, Biosciences
University of Helsinki, Biosciences
University of Helsinki, Biosciences
Datum: 2016-12-06
Språk: eng
Sidantal: 25
Tillhör serie: PLoS Biology
ISSN: 1544-9173
Permanenta länken (URI): http://hdl.handle.net/10138/174655
Abstrakt: Author Summary Human activities have increased the concentrations of CO2 and harmful air pollutants such as ozone in the troposphere. These changes can have detrimental consequences for agricultural productivity. Guard cells, which form stomatal pores on leaves, regulate plant gas exchange. To maintain photosynthesis, stomata open to allow CO2 uptake, but at the same time, open stomata lead to loss of water and allow the entrance of ozone. Elevated atmospheric CO2 levels reduce stomatal apertures, which can improve plant water balance but also increases leaf temperature. Using genetic approaches—in which we exploit natural variation and mutant analysis of thale cress (Arabidopsis thaliana)—we find that MITOGEN-ACTIVATED PROTEIN KINASE 12 (MPK12) and its inhibitory interaction with another kinase, HIGH LEAF TEMPERATURE 1 (HT1) (involved in guard cell CO2 signaling), play a key role in this regulatory process. We have therefore identified a mechanism in which guard cell CO2 signaling regulates how efficiently plants use water and cope with the air pollutant ozone.
Subject: 1182 Biochemistry, cell and molecular biology
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