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园艺学报 ›› 2012, Vol. 39 ›› Issue (3): 443-452.

• 果树 • 上一篇    下一篇

龙眼TPI基因的克隆及其在体胚发生过程中的表达分析

赖呈纯1,2,赖钟雄1,*,方智振1,林玉玲1,姜顺日1   

  1. 1福建农林大学园艺植物生物工程研究所,福州 350002;2福建省农业科学院农业工程技术研究所,福州 350003
  • 收稿日期:2011-11-08 修回日期:2012-02-21 出版日期:2012-03-25 发布日期:2012-03-25
  • 通讯作者: 赖钟雄 E-mail:laizx01@163.com

Cloning of TPI Gene from Embryogenic Callus and Its Expression Analysis During Somatic Embryogenesis in Longan

LAI Cheng-chun1,2,LAI Zhong-xiong1,*,FANG Zhi-zhen1,LIN Yu-ling1,and JIANG Shun-ri1   

  1. 1Institute of Horticultural Biotechnology,Fujian Agriculture and Forestry University,Fuzhou 350002,China;2Institute of Agricultural Engineering and Technology,Fujian Academy of Agricultural Sciences,Fuzhou 350003,China
  • Received:2011-11-08 Revised:2012-02-21 Online:2012-03-25 Published:2012-03-25
  • Contact: LAI Zhong-xiong E-mail:laizx01@163.com

摘要: 采用RT-PCR结合RACE法,通过T/A克隆测序,获得龙眼胚性愈伤组织磷酸丙糖异构酶基因(TPI)两个类型的全长序列TPIⅠ(GenBank登录号:FJ595244)和TPIⅡ(GenBank登录号:GU073294),序列全长分别为1 084 bp和1 113 bp,其ORF都由765 bp核苷酸组成,编码254个氨基酸,与其它植物的TPI在核苷酸序列和推导的氨基酸序列的相似性较高。qRT-PCR结果分析表明,在龙眼体胚发生过程中,TPI在松散型胚性愈伤组织阶段的转录水平比较低,在胚性愈伤组织Ⅱ阶段转录水平急剧升高,并一直持续到胚性紧实球形结构阶段,球形胚阶段大幅下调,之后至子叶形胚阶段都维持在较低水平,初步证明TPI及其编码蛋白在龙眼启动体胚发生和早期体胚发育中行使重要的功能。

关键词: 龙眼, 体胚发生, 磷酸丙糖异构酶, 基因克隆, 实时荧光定量PCR

Abstract: The complete cDNA sequence of triosephosphate isomerase gene(TPI)of longan embryogenic callus was obtained by reverse transcription polymerase chain reaction(RT-PCR)with rapid amplification of cDNA ends(RACE). And the mRNA transcription level of this gene was surveyed by real-time reverse transcription PCR(qRT-PCR)during somatic embryogenesis in longan. The results showed that the full-length cDNA sequences of two type longan embryogenic callus TPI were cloned,namely TPIⅠ(GenBank accession number FJ595244)and TPIⅡ(GenBank accession number GU073294). The complete nucleotide sequences of two TPI were 1 084 bp and 1 113 bp respectively. And they all contained a 765-nucleotides-long open reading frame(ORF)which encoded a protein of 254 amino acid residues. The results showed that the mRNA transcription levels of longan TPI were different at the different stages of longan somatic embryogenesis. In conclusion,it was preliminarily revealed that two type TPI genes and their encoded functional proteins may play an important role during the early somatic

Key words: longan, somatic embryogenesis, triosephosphate isomerase, gene cloning, real-time PCR