石榴PgUFGT基因克隆及表达分析
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国家自然科学基金项目(31272143);


Cloning and Expression Analysis of PgUFGT Gene from Punica granaum L.
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    摘要:

    利用RTPCR和RACE方法,从石榴(Punica granatum L.)果皮中克隆到一个类黄酮糖基转移酶(UFGT)基因(PgUFGT)全长cDNA序列(GenBank登录号为KF841620)。PgUFGT基因编码区1 476 bp,编码491个氨基酸。PgUFGT蛋白具有保守PSPG基序、UDP糖基转移酶家族结构域和UDP葡萄糖醛酸基/葡萄糖基转移酶保守域(UDPGT),与其他植物UFGT蛋白一致性较高;系统进化树分析结果表明,PgUFGT属于类黄酮3O糖基转移酶类。荧光定量qRTPCR结果表明,PgUFGT基因在‘红宝石’和‘水晶甜’2个石榴品种的发育期内具有不同的表达模式,PgUFGT在‘红宝石’石榴中有2个转录表达高峰,而在‘水晶甜’石榴中仅有1个表达高峰,表明PgUFGT可能在2个石榴品种中具有不同的催化作用。该研究结果为进一步研究石榴果实色泽形成的分子机制奠定了基础。

    Abstract:

    A gene encoding UDPglycose: flavonoid glycosyltransferase (UFGT) was isolated from peels of Punica granatum L. with RTPCR and RACE methods. The accession number in GenBank was KF841620.The length of OFR was 1 476 bp, encoding 491 amino acids. The deduced PgUFGT protein contained a typical conserved PSPG motif, an UDPglucosyltransferase and UDPglucoronosyltransferase/glucosyltransferase (UDPGT) domain, showing highly identities to UFGTs of other plants. Phylogenetic tree analysis showed that PgUFGT belonged to flavonoid 3Oglycosyltransferase categories. The results from qRTPCR indicated that the expression patterns of PgUFGT were different in Hongbaoshi and Shuijingtian cultivars during fruit development. In Hongbaoshi pomegranate, the transcription abundance of PgUFGT had two peaks, while in Shuijingtian pomegranate, only one expression peak of PgUFGT was observed.The roles of PgUFGT played may be different in two pomegranate cultivars. These results were the basis of further studies on molecular mechanisms of pomegranate fruit coloration.

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招雪晴, 李 勃, 苑兆和.石榴PgUFGT基因克隆及表达分析[J].西北植物学报,2017,37(4):646-653

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  • 在线发布日期: 2017-05-05
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