‘红阳’猕猴桃cDNA文库构建及F3H基因的表达初探

doi:10.3724/SP.J.1005.2009.01265

遗传 ›› 2009, Vol. 31 ›› Issue (12): 1265-1272.doi: 10.3724/SP.J.1005.2009.01265

‘红阳’猕猴桃cDNA文库构建及F3H基因的表达初探

杨红丽^{1, 3}, 王彦昌¹, 姜正旺¹, 黄宏文^1,2

1. 中国科学院武汉植物园保育遗传重点实验室, 武汉 430074; 2. 中国科学院华南植物园, 广州 510650; 3. 中国科学院研究生院, 北京 100049

收稿日期:2009-03-12 修回日期:2009-08-10 出版日期:2009-12-10 发布日期:2009-12-10
通讯作者: 王彦昌;黄宏文 E-mail:kiwifruit@wbgcas.cn;huanghw@mail.scbg.ac.cn
基金资助:
国家自然科学基金项目(编号：30671433), 中国科学院知识创新工程重要方向项目“中国特有经济植物野生居群基因流动态及有益基因发掘”(编号：KSCX2-YW-N-061)子课题“野生果树有益基因的挖掘”资助

Construction of cDNA library of ‘Hongyang’ kiwifruit and analysis of F3H expression

YANG Hong-Li^{1, 3}, WANG Yan-Chang¹, JIANG Zheng-Wang¹, HUANG Hong-Wen^{1, 2}

1. Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; 2. South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; 3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received:2009-03-12 Revised:2009-08-10 Online:2009-12-10 Published:2009-12-10
Contact: WANG Pan-Chang;HUANG Hong-Wen E-mail:kiwifruit@wbgcas.cn;huanghw@mail.scbg.ac.cn

摘要/Abstract

摘要：

利用SMART (switching mechanism at 5′ end of the RNA transcript)技术构建了红肉猕猴桃品种‘红阳’(Actinidia chinesis cv‘Hongyang’)内果皮组织的全长cDNA文库, 此文库的构建有助于克隆与次生代谢相关的基因, 特别是红肉猕猴桃花青素特异合成代谢的基因。文库滴度为6.7×10⁴ cfu/mL, 库容为2.72×10⁸ cfu/mL, 文库重组率99.8%, 插入片段多数分布在700~1 000 bp。随机挑选1 014个克隆进行测序, 测序成功963个, 经过序列拼接去除低质量序列后获得632个unigenes, 包括92个contigs和540个singletons, 获得已知功能unigenes共 441个。从所测克隆中得到一个花青素途径的结构基因AcF3H, 其cDNA序列长1 369 bp(GenBank登录号: FJ54 2819), CDS区为1 101 bp, 编码366个氨基酸的多肽。与拟南芥、葡萄及龙胆已知F3H氨基酸序列比对, 发现该基因十分保守。通过RT-PCR技术对苍溪栽培的不同发育时期‘红阳’猕猴桃果实AcF3H基因的表达进行了分析。结果表明, 果肉转色前AcF3H基因表达量较高, 而转色初期表达量降低, 此后随着果实着色加深表达量维持在较高水平。

关键词: 红阳’猕猴桃, cDNA文库, F3H, 表

Abstract:

The SMART switching mechanism at 5′ end of the RNA transcript technique was used to construct a cDNA library from inner pericarp of the red flesh kiwifruit Actinidia chinesis cv ‘Hongyang’. Construction of cDNA library facili-tated cloning of the genes associated with the secondary metabolism, the specific genes in the course of anthocyanin bio-synthesis. The titers of the primary library and the amplified library were 6.7×10⁴ cfu/mL and 2.72×10⁸cfu/mL, respec-tively. The recombination rate was over 99.8%. The lengths of most cDNAs in the library ranged from 700 bp to 1 000 bp. A total of 1 014 clones randomly chosen from the cDNA library were sequenced and these expressed sequence tags (ESTs) were analyzed. A set of 963 sequences were obtained. Clustering and assembly of these cDNA sequences resulted in 632 unigenes, including 92 contigs and 540 singletons. Among them, 441 EST unigenes were predicted to have known functions. Gene AcF3H, which participated in anthocyanin biosynthesis from sequencing, was obtained. The length of the AcF3H cDNA was 1 369 bp (GenBank accession No: FJ542819). Bioinformatic analysis showed that AcF3H ORF region was 1 101 bp, which encoded a peptide with 366 amino acids. The amino acid sequences of this gene shared extensive homology to Arabidopsis, Vitis, and Eustoma. The expression of AcF3H was investigated in inner pericarp of ‘Hongyang’ at six stages during fruit development using RT-PCR. The expression level was high before colour-changed stage, and then decreased at the primary stage of pigmentation.

Key words: Hongyang Kiwifruit, cDNA library, F3H

杨红丽，王彦昌，黄宏文. ‘红阳’猕猴桃cDNA文库构建及F3H基因的表达初探[J]. 遗传, 2009, 31(12): 1265-1272.

YANG Gong-Li, WANG Pan-Chang, JIANG Zheng-Wang, HUANG Hong-Wen. Construction of cDNA library of ‘Hongyang’ kiwifruit and analysis of F3H expression[J]. HEREDITAS, 2009, 31(12): 1265-1272.

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‘红阳’猕猴桃cDNA文库构建及F3H基因的表达初探

Construction of cDNA library of ‘Hongyang’ kiwifruit and analysis of F3H expression

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