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园艺学报 ›› 2013, Vol. 40 ›› Issue (2): 373-379.

• 研究报告 • 上一篇    下一篇

鹤望兰八氢番茄红素脱氢酶基因SrPDS 的克隆及表达分析

黄敏玲,樊荣辉   

  1. (福建省农业科学院作物研究所,福建省农业科学院花卉研究中心,福建省特色花卉工程技术研究中心,福州
    350013)
  • 出版日期:2013-02-25 发布日期:2013-02-25

Cloning and Expression Analysis of Phytoene Desaturase in Strelitzia
reginae
Banks

 HUANG  Min-Ling, FAN  Rong-Hui   

  1. (Institute of Crop Sciences,Fujian Academy of Agricultural Sciences,Flowers Research Center,Fujian Academy of
    Agricultural Sciences,Fujian Engineering Research Center for Characteristic Floriculture,Fuzhou 350013,China)
  • Online:2013-02-25 Published:2013-02-25

摘要: 采用RT-PCR和RACE方法从鹤望兰黄色花萼中克隆到类胡萝卜素合成途径关键基因SrPDS,
该 cDNA 全长2 069 bp,具有完整的开放阅读框(ORF),共1 746 个碱基,编码581 个氨基酸。氨基酸
同源性分析表明,SrPDS 推导的氨基酸序列与已报道的其他植物的PDS 蛋白具有很高的同源性。系统进
化树分析显示,鹤望兰SrPDS 与番红花首先聚为一类,其次与百合、水仙PDS 蛋白亲缘关系较近。应用
半定量PCR 分析表明,SrPDS 在黄色花萼和叶片中高表达,在蓝色花瓣和根中低表达;且在花发育的始
花期表达量最高,表明该基因在黄色花萼发育过程中起着重要作用。

关键词: 鹤望兰, 八氢番茄红素脱氢酶, 类胡萝卜素生物合成, 基因克隆

Abstract: The SrPDS gene cDNA sequence involved in carotenoids synthesis was cloned from the
yellow sepals of Strelitzia reginae Banks using RT-PCR and RACE techniques. The cDNA sequence
consists of 2 069 bp with an intact open reading frame of 1 746 bp,encoding a polypeptide of 581 amino
acids. Homology analysis showed that the deduced SrPDS protein was highly homologous to other PDS
proteins from different plants. Phylogenetic analysis indicated that SrPDS was clustered together with PDS
of Crocus sativus firstly and was more related to PDS of Narcissus tazetta and Lilium hybrid division. The
semi-quantitative PCR analysis indicated that SrPDS showed the highest transcript abundance in early
flowering season and SrPDS was highly expressed in leaves and yellow sepals,but lowly expressed in blue
petals and root. The results indicated that SrPDS played an important role in the growth of yellow sepals.

Key words: Strelitzia reginae Banks, phytoene desaturase, carotenoids synthesis, gene cloning

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