Expression of carotenogenic genes during the development and ripening of watermelon fruit

文献类型： 外文期刊

第一作者： Kang, Baoshan

作者： Kang, Baoshan;Zhao, Wen-en;Tian, Peng;Zhao, Wen-en;Hou, Yaobing

作者机构：

关键词： LYCOPENE;VAR;CAROTENOIDS;COLOUR;GENE EXPRESSION;RIPENING;WATERMELONS

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Five watermelon varieties with different flesh colors: ZAOHUA (red); 96B41 (pink); 307CHAOFENG (yellow); UNKNOWN (orange); and SANBAI (white) were used to investigate the relationship between carotenoid profiles and expression of carotenoid-related genes during fruit development and ripening. In mature fruit, ZAOHUA and 96B41 accumulated high level of lycopene, SANBAI contained trace amounts of carotenoids. Through HPLC and dot blot hybridization, carotenoid content was analyzed and compared to the expression of carotenoid-related genes including Psy, Pds, Zds, CrtIso, Lcyb, Chyb, Nced1, Nced2, Nced3 during fruit development. All genes examined were expressed in all five watermelon varieties. In red and pink color varieties, the decrease of gene expression for Lcyb and Chyb at stage C (30d after pollination) may be consistent with the high accumulation of lycopene and o-carotene. In the yellow variety, expression of the detected genes increased markedly with the onset of maturation, but little carotenoid accumulation was detected, which may be due to high level of carotenoid cleavage dioxygenases. Expression of all detected genes decreased rapidly in the white color variety upon fruit ripening, which may be attributed to a reduction in metabolic flux in the carotenoid pathway. These results imply the complex regulation of the carotenoid biosynthetic pathway in watermelon.

分类号： S6

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