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园艺学报 ›› 2012, Vol. 39 ›› Issue (7): 1387-.

• 研究简报 • 上一篇    下一篇

月季(Rosa chinensis)丁香酚合成酶基因RcEGS1的克隆及其表达分析

王海萍,晏慧君,张 颢,蹇洪英,王其刚,邱显钦,李淑斌,周宁宁,唐开学   

  1. 华中农业大学园艺林学学院,武汉 430070;云南省农业科学院花卉研究所,云南省花卉育种重点实验室,昆明 650205
  • 出版日期:2012-07-25 发布日期:2012-07-25

Cloning and Expression Analysis of Eugenol Synthase Gene RcEGS1 in Rosa chinensis‘Pallida’

WANG  Hai-Ping, YAN  Hui-Jun, ZHANG   Hao, JIAN  Hong-Ying, WANG  Qi-Gang, QIU  Xian-Qin, LI  Shu-Bin, ZHOU  Ning-Ning, TANG  Kai-Xue   

  1. College of Horticulture and Forestry Sciences,Huazhong Agricultural University,Wuhan 430070,China;YunnanFlower Breeding Key Lab,Flower Research Institute,Yunnan Academy of Agricultural Sciences,Kunming 650205,China
  • Online:2012-07-25 Published:2012-07-25

摘要: 根据GenBank 发表的丁香酚合成酶(EGS)基因的蛋白保守序列设计引物,利用RT-PCR结合RACE-PCR 技术,从古老月季(Rosa chinensis)品种‘月月粉’盛开期的花瓣中获得了1 个新的丁香酚合成酶基因RcEGS1,GenBank 登录号为JQ522949。该基因全长为1 171 bp,开放阅读框(ORF)951bp,编码317 个氨基酸;蛋白质理论分子量为35.64 kD,等电点为7.36。氨基酸同源性分析表明,RcEGS1与矮牵牛PhIGS1 的氨基酸同源性达到70%,与罗勒ObEGS1 的同源性为59%,与月季RhEGS1 的同源性仅为48.2%。运用实时荧光定量PCR 法分析RcEGS1 在不同组织部位和不同开放时期花瓣中的表达,发现其在叶片和茎段中没有表达,在花瓣和萼片中有表达,在盛开期的花瓣中表达量最高。

关键词: 月季, 花香, 丁香酚合成酶基因, 实时定量PCR

Abstract: Using PCR degenerate primers designed based on GenBank published the conserved protein sequences of eugenol synthase genes to amplify cDNA fragments by RT-PCR and RACE-PCR,a new eugenol synthase gene named RcEGS1 was cloned from the flower petal of Rosa chinensis‘Pallida’,
and its GenBank accession number is JQ522949. The full cDNA was 1 171 bp in length with an open reading frame(ORF)of 951 bp encoding a protein of 317 amino acids. Molecular weight and isoelectric point of the protein was 35.64 kD and 7.36,respectively. Amino acids homology analysis indicated that
the RcEGS1 and RhEGS1 proteins are 47.7% identical to each other,and had 70% and 59% homologies with CbEGS2 in Clarkia breweri and PhEGS1 in Petunia hybirida,respectively. The expression profile of RcEGS1 in different tissues and different developmental stages of rose flower was analyzed by quantitat Real-time PCR. The results showed that RcEGS1 expressed specifically in the flower petals and the sepals,and it had the highest transcript level in the petal. In additional,RcEGS1 was higher transcript level in the developmental blooming stage,and lower levels in that of bud and senescence stage.

Key words: rose, fragrance, RcEGS1, qRT-PCR

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