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Ethylene signaling may be involved in the regulation of tocopherol biosynthesis in Arabidopsis thaliana
Author(s) -
Cela Jana,
Falk Jon,
Munné-Bosch Sergi
Publication year - 2009
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/j.febslet.2009.02.036
Subject(s) - mutant , arabidopsis thaliana , ethylene , arabidopsis , biosynthesis , wild type , biochemistry , tocopherol , oxidative stress , antioxidant , chemistry , biology , microbiology and biotechnology , gene , vitamin e , catalysis
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.