Plant polar growth in tobacco disturbed by γ-tubulin gene silencing |
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基金项目: | Acknowledgement This work was supported by the Beijing New Star of Science and Technology Project (H013610020112). |
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摘 要: | To further understand the functions of γ-tubulin in plant cells, we conducted a study in which the γ-tubulin gene was down-regulated in tobacco plants (obtained by the Agrobacterium-mediated method). This involved transforming the target fragments, in which the sense and antisense partial γ-tubulin cDNA fragments were ligated together, into Nicotiana tabacum var. Samsun NN. The γ-tubulin downregulated transformants developed multiple meristems or branches with trumpet-shaped leaves; their root generation also appeared abnormal, with the taproots undeveloped, whereas lateral roots were developed. In addition, the content of indole-3-acetic acid (IAA) and expression of polarity transportation vector PGP1 were aberrant. These results suggest that γ-tubulin gene silencing disturbed the polar growth of tobacco plants, and that this phenomenon was probably correlated with the IAA content and the polar transportation
process.
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关 键 词: | 微管蛋白 植物细胞 基因沉默 烟草 农杆菌介导法 cDNA片段 蛋白基因 分支机构 |
收稿时间: | 23 May 2008 |
修稿时间: | 20 June 2008 |
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