https://www.ahs.ac.cn/images/0513-353X/images/top-banner1.jpg|#|苹果
https://www.ahs.ac.cn/images/0513-353X/images/top-banner2.jpg|#|甘蓝
https://www.ahs.ac.cn/images/0513-353X/images/top-banner3.jpg|#|菊花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner4.jpg|#|灵芝
https://www.ahs.ac.cn/images/0513-353X/images/top-banner5.jpg|#|桃
https://www.ahs.ac.cn/images/0513-353X/images/top-banner6.jpg|#|黄瓜
https://www.ahs.ac.cn/images/0513-353X/images/top-banner7.jpg|#|蝴蝶兰
https://www.ahs.ac.cn/images/0513-353X/images/top-banner8.jpg|#|樱桃
https://www.ahs.ac.cn/images/0513-353X/images/top-banner9.jpg|#|观赏荷花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner10.jpg|#|菊花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner11.jpg|#|月季
https://www.ahs.ac.cn/images/0513-353X/images/top-banner12.jpg|#|菊花

园艺学报 ›› 2017, Vol. 44 ›› Issue (6): 1021-1028.doi: 10.16420/j.issn.0513-353x.2016-0711

• 研究论文 •    下一篇

苹果MdRGL3a基因的功能分析

任怡然,赵 强,由春香,郝玉金*   

  1. (山东农业大学园艺科学与工程学院,作物生物学国家重点实验室,国家苹果工程技术研究中心,山东泰安 271018)
  • 出版日期:2017-06-25 发布日期:2017-06-25

Function Analysis of MdRGL3a Gene in Malus × domestica

REN Yiran,ZHAO Qiang,YOU Chunxiang,and HAO Yujin*   

  1. (College of Horticulture Science and Engineering,Shandong Agricultural University,State Key Laboratory of Crop Biology,National Research Center for Apple Engineering and Technology,Tai’an,Shandong 271018,China)
  • Online:2017-06-25 Published:2017-06-25

摘要:

为进一步揭示苹果(Malus × domestica)中GA信号转导机制以及MdDELLAs的生理功能,以‘嘎拉’苹果为试材,克隆基因MdRGL3a(GenBank:DQ007887),并通过在拟南芥中过量表达,分析该基因的功能。qRT-PCR结果表明,MdRGL3a在苹果不同组织中都有表达,其中在花和果实中表达量较高。在拟南芥中异位表达MdRGL3a,表现为根长和下胚轴变短,种子萌发较慢,叶片变小,植株矮化。过表达MdRGL3a拟南芥植株对赤霉素介导的生长反应敏感性降低,证明MdRGL3a是GA信号途径中的一个负调控因子。

关键词: 苹果, MdRGL3a, DELLA蛋白, 表达分析, 功能鉴定

Abstract:

In order to further reveal the mechanism of GA signal transduction in apple(Malus × domestica) and the physiological function of MdDELLAs,a gene named MdRGL3a(GenBank:DQ007887)cloned from‘Royal Gala’was analyzed. The function of this gene was analyzed by ectopic expression of MdRGL3a in Arabidopsis thaliana. Real-time quantitative PCR results showed that MdRGL3a was expressed in different tissues,and the expression level was higher in flowers and fruits. Ectopic expression of MdRGL3a in Arabidopsis thaliana reduced response to GA3,which exhibited shorter root and hypocotyl,slower germination,smaller leaves and shorter stalk. The result of Arabidopsis thaliana plants treated with GA3 showed that MdRGL3a reduced the promotion of GA for plants growth and development,revealing that MdRGL3a might be a negative regulator of GA signaling pathway.

Key words: apple, MdRGL3a, DELLA protein, expression analysis, functional identification

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