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      Regulation of ion homeostasis under salt stress

      Current Opinion in Plant Biology
      Elsevier BV

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          Abstract

          When under salt stress, plants maintain a high concentration of K(+) and a low concentration of Na(+) in the cytosol. They do this by regulating the expression and activity of K(+) and Na(+) transporters and of H(+) pumps that generate the driving force for transport. Although salt-stress sensors remain elusive, some of the intermediary signaling components have been identified. Evidence suggests that a protein kinase complex consisting of the myristoylated calcium-binding protein SOS3 and the serine/threonine protein kinase SOS2 is activated by a salt-stress-elicited calcium signal. The protein kinase complex then phosphorylates and activates various ion transporters, such as the plasma membrane Na(+)/H(+) antiporter SOS1.

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          Author and article information

          Journal
          Current Opinion in Plant Biology
          Current Opinion in Plant Biology
          Elsevier BV
          13695266
          October 2003
          October 2003
          : 6
          : 5
          : 441-445
          Article
          10.1016/S1369-5266(03)00085-2
          12972044
          a57b39f7-7c02-4efc-b3b1-73777048f847
          © 2003

          https://www.elsevier.com/tdm/userlicense/1.0/

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