Journal Article

MdERFs, two ethylene-response factors involved in apple fruit ripening

Aide Wang, Dongmei Tan, Ayako Takahashi, Tian Zhong Li and Takeo Harada

in Journal of Experimental Botany

Published on behalf of Society for Experimental Biology

Volume 58, issue 13, pages 3743-3748
Published in print October 2007 | ISSN: 0022-0957
Published online October 2007 | e-ISSN: 1460-2431 | DOI: http://dx.doi.org/10.1093/jxb/erm224
MdERFs, two ethylene-response factors involved in apple fruit ripening

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Two MdERFs (ethylene-response factors) were isolated from ripening apple (Malus×domestica Borkh. cv. Golden Delicious) fruit. The features of their conserved motifs indicated that MdERF1 and MdERF2 belong to group VII and group IX categories in Arabidopsis, respectively. MdERF1 was expressed predominantly in ripening fruit, although a small degree of expression was also observed in non-fruit tissues, whereas MdERF2 was expressed exclusively in ripening fruit. The increased expression in ripening fruit was repressed by treatment with 1-methylcyclopropene (1-MCP: a potent antagonist of ethylene receptors), indicating that transcription is regulated positively by the ethylene signalling system. Indeed, it was a tendency for cultivars with low ethylene production to show lower MdERFs expression than those with high ethylene production. On the basis of concomitant analyses of the expression of some genes related to ripening, the functions of MdERFs and the role of ethylene in the ripening process are discussed.

Keywords: Apple fruit; ERF; ethylene; ripening

Journal Article.  2833 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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