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Journal of Experimental Botany, Vol 50, 877-878, Copyright © 1999 by Oxford University Press

ARTICLES

Gene note. A {beta}-D-xylosidase-like gene is expressed during fruit ripening in Japanese pear (Pyrus pyrifolia Nakai)

A Itai, K Yoshida, K Tanabe and F Tamura
Laboratory of Horticultural Science, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan; Corresponding author; Fax: +81 857 31 6749; E-mail: itai@pear.agr.tottori-u.ac.jp

To elucidate the molecular basis of fruit ripening in Japanese pear (Pyrus pyrifolia), studies to identify genes up-regulated during ripening by differential display techniques and cDNA library screening were started. A cDNA clone, JPRXYL, encoding a polypeptide which shows high similarity to bacterial-D-xylosidases was identified. Northern analysis showed that the transcripts of JPRXYL accumulated during fruit ripening, after harvest and also in yellowing old leaves. These results suggest that JPRXYL may be a senescence-related gene.Keywords: Fruit ripening, senescence, Japanese pear, -D-xylosidase.
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