FEBS Letters
Volume 583, Issue 6 , Pages 992-996, 18 March 2009

Ethylene signaling may be involved in the regulation of tocopherol biosynthesis in Arabidopsis thaliana

Edited by Ulf-Ingo Flügge

  • Jana Cela

      Affiliations

    • Departament de Biologia Vegetal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain
    • ,
  • Jon Falk

      Affiliations

    • Institute of Botany, Christian-Albrechts-University of Kiel, Olshausenstrasse 40, 24098 Kiel, Germany
    • ,
  • Sergi Munné-Bosch

      Affiliations

    • Departament de Biologia Vegetal, Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 645, 08028 Barcelona, Spain
    • Corresponding Author InformationCorresponding author. Fax: +34 934112842.

Received 10 February 2009; received in revised form 19 February 2009; accepted 20 February 2009. published online 02 March 2009.

Abstract 

Tocopherol biosynthesis was investigated in ein3-1, etr1-1 and eto1-1 mutants of Arabidopsis thaliana, which show a defect in ethylene signaling, perception and over-produce ethylene, respectively. A mutation in the EIN3 gene delayed the water-stress related increase in α-tocopherol and caused a reduction in the levels of this antioxidant by ca. 30% compared to the wild type. In contrast to the wild type and ein3-1 mutants, both etr1-1 and eto1-1 mutants showed a sharp (up to 5-fold) increase in α-tocopherol levels during leaf aging. It is concluded that ethylene perception and signaling may be involved in the regulation of tocopherol biosynthesis during water stress and leaf aging.

Keywords: Ethylene, Leaf aging, Tocopherol, Vitamin E, Water-stress

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PII: S0014-5793(09)00140-9

doi:10.1016/j.febslet.2009.02.036

FEBS Letters
Volume 583, Issue 6 , Pages 992-996, 18 March 2009

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