Accumulation of γ- rather than α-tocopherol alters ethylene signaling gene expression in the vte4 mutant of Arabidopsis thaliana.

ABSTRACT: Tocopherols are antioxidants found in chloroplasts of leaves, and it is a matter of current debate whether or not they can affect signaling and gene expression in plant cells. For insight into the possible effects of altered tocopherol composition in chloroplasts on gene expression in the nucleus, the expression of ethylene biosynthesis, perception and signaling genes was investigated in vte1 and vte4 Arabidopsis thaliana mutants, which are impaired in tocopherol (vitamin E) biosynthesis. Changes in gene expression were measured in plants exposed to either salt or water stress, and in young and mature leaves of vte1 and vte4 mutants, which lack tocopherol cyclase and γ-tocopherol methyltransferase, respectively. While transcript levels of ethylene signaling genes in the vte1 mutant and the

SUBMITTER: Cela J 

PROVIDER: S-EPMC3153729 | biostudies-literature | 2011 Aug

REPOSITORIES: biostudies-literature