Reactive oxygen species homeostasis and signalling during drought and salinity stresses

Authors

  • GAD MILLER,

    1. Department of Biochemistry and Molecular Biology, University of Nevada, MS200, Reno, Nevada 89557, USA and
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  • NOBUHIRO SUZUKI,

    1. Department of Biochemistry and Molecular Biology, University of Nevada, MS200, Reno, Nevada 89557, USA and
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  • SULTAN CIFTCI-YILMAZ,

    1. Department of Biochemistry and Molecular Biology, University of Nevada, MS200, Reno, Nevada 89557, USA and
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  • RON MITTLER

    Corresponding author
    1. Department of Biochemistry and Molecular Biology, University of Nevada, MS200, Reno, Nevada 89557, USA and
    2. Department of Plant Sciences, Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel
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R. Mittler. Fax: +1 775 784 6911; e-mail: ronm@unr.edu

ABSTRACT

Water deficit and salinity, especially under high light intensity or in combination with other stresses, disrupt photosynthesis and increase photorespiration, altering the normal homeostasis of cells and cause an increased production of reactive oxygen species (ROS). ROS play a dual role in the response of plants to abiotic stresses functioning as toxic by-products of stress metabolism, as well as important signal transduction molecules. In this review, we provide an overview of ROS homeostasis and signalling in response to drought and salt stresses and discuss the current understanding of ROS involvement in stress sensing, stress signalling and regulation of acclimation responses.

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