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园艺学报 ›› 2013, Vol. 40 ›› Issue (12): 2419-2428.

• 蔬菜 • 上一篇    下一篇

拟南芥At-pri-miR828 基因的克隆及其对番茄的遗传转化

贾小云, 于治芹, 梁建萍, 唐贵良, 金雷皓, 张 莉, 贺立恒, 李润植   

  1. 1 山西农业大学生命科学学院,山西太谷 030801;2 密歇根理工大学生物科学院,美国霍顿 49931;3 河南农业大
    学,郑州 450002;4 山西农业大学农学院,山西太谷 030801
  • 出版日期:2013-12-25 发布日期:2013-12-25

Cloning of Arabidopsis At-pri-miR828 Gene and Its Genetic Transformation into Tomato

 JIA  Xiao-Yun, YU  Zhi-Qin, LIANG  Jian-Ping, TANG  Gui-Liang, JIN  Lei-Hao, ZHANG   Li, HE  Li-Heng, LI  Run-Zhi   

  1. (1College of Life Sciences,Shanxi Agricultural University,Taigu,Shanxi 030801,China;2Department of Biological
    Sciences,Michigan Technological University,Houghton,MI 49931,USA;3Henan Agricultural University,Zhengzhou
    450002,China;4College of Agriculture,Shanxi Agricultural University,Taigu,Shanxi 030801,China)
  • Online:2013-12-25 Published:2013-12-25

摘要: MicroRNA828(miRNA828)是一种新近发现的生物学功能还未全面研究的miRNA。为从
不同角度阐明miRNA828 的生物学功能,从拟南芥中克隆到At-pri-miR828 基因并构建了该基因过量表达
的植物表达载体pC2300-pOT2-At-pri-miR828,通过农杆菌介导的叶盘法将pC2300-pOT2-At-pri-miR828
导入异源植物番茄品种‘Ailsa Craig’中。PCR 鉴定结果显示,外源基因At-pri-miR828 已成功整合到转
基因番茄基因组中,共获得9 个转基因株系,67 株转基因植株。定量PCR 检测结果显示,与野生型番茄
植株相比,转基因植株中miR828 的表达量显著增加,而生物信息学所预测的miR828 靶基因Sly-myb-like1
的表达水平则相应降低。花青素含量测定结果显示,miR828 过量表达的转基因番茄植株花青素含量明显
低于野生型植株,表明miR828 参与了番茄花青素的生物合成调控。

关键词: 番茄, miR828, Sly-myb-like1, 花青素, 实时定量PCR

Abstract: MicroRNA828(miR828)is a newly identified small RNA whose biological functions are
still not very clear. To explore the biological functions of miR828,particularly in tomato,the At-primiR828
gene was isolated from Arabidopsis thaliana,and cloned into the corresponding site of the
pCAMBIA2300 to construct the plant expression vector pC2300-pOT2-At-pri-miR828. This At-pri-miR828 overexpressing vector was then introduced into tomato(Solanum lycopersicum Mill.‘Ailsa Graig’)using
Agrobacterium-mediated transformation. Total of 9 transgenic lines and 67 transgenic plants carrying the
At-pri-miR828 gene under the control of the 35S promoter were generated. PCR amplification showed that
At-pri-miR828 was integrated into the genome DNA of transgenic tomatoes. Real-time PCR analysis
demonstrated that miR828 mRNA level in the transgenic tomatoes was increased greatly. Accordingly,
expression of Sly-myb-like1,a potential target gene of miR828 predicted by informatics,was suppressed.
Further anthocyanin content analysis revealed that anthocyanin content was greatly reduced in miR828
overexpressed transgenic plants,demonstrating miR828 might function in the anthocyanin biosynthesis of
tomato.

Key words: tomato, miR828, Sly-myb-like1, anthocyanin, real-time PCR

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