Lycopene content and expression of phytoene synthase and lycopene beta-cyclase genes in tetraploid watermelon
文献类型: 外文期刊
第一作者: Yuan, P. L.
作者: Yuan, P. L.;Liu, W. G.;Zhao, S. J.;Lu, X. Q.;Yan, Z. H.;He, N.;Zhu, H. J.
作者机构:
关键词: Tetraploid watermelon;different tissues;fruit development;gene expression;lycopene accumulation
期刊名称:CUCURBITACEAE 2012: PROCEEDINGS OF THE XTH EUCARPIA MEETING ON GENETICS AND BREEDING OF CUCURBITACEAE
ISSN:
年卷期: 2012 年
页码:
收录情况: SCI
摘要: Watermelon (Citrullus lanatus) is one of the few crop that provide high lycopene to the human diet. In this paper, tetraploid watermelon was used to elucidate the molecular basis of lycopene accumulation and the gene expression levels of phytoene synthase (PSYA) and lycopene b-cyclase (LCYB). High performance liquid chromatography analysis was applied for the determination of lycopene content. Real-time polymerase chain reaction analysis indicated that the PSYA and LCYB genes were expressed in all the analyzed different organs of tetraploid watermelons with varied expression levels, particularly high in the flowers of watermelon. During fruit maturation, the expression levels of PSYA and LCYB increased during the mid-stages but decreased in the fully mature fruit. In addition, lycopene was accumulated as the flesh changed from white to red. Thus, PSYA and LCYB expression are correlated with lycopene accumulation during fruit maturation. Ripe fruit had higher lycopene concentrations than unripe fruit. Then we hope to provide a theoretical basis for optimization of high-lycopene watermelon breeding.
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