Overexpression of OsDof12 affects plant architecture in rice (Oryza sativa L.)

文献类型： 外文期刊

第一作者： Wu, Qi

作者： Wu, Qi;Li, Shigui;Wu, Qi;Li, Dayong;Liu, Xue;Zhao, Xianfeng;Li, Xiaobing;Zhu, Lihuang;Wu, Qi;Li, Dayong;Liu, Xue;Zhao, Xianfeng;Li, Xiaobing;Zhu, Lihuang;Li, Dejun;Liu, Xue

作者机构：

关键词： OsDoff2;Dof transcription factor;plant architecture;rice (Oryza sativa L.)

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2015 年 6 卷

页码：

收录情况： SCI

摘要： Dof (DNA binding with one finger) proteins, a class of plant specific transcription factors, are involved in plant growth and developmental processes and stress responses. However, their biological functions remain to be elucidated, especially in rice (Ora sativa L.). Previously, we have reported that OsDo112 can promote rice flowering under long-day conditions. Here, we further investigated the other important agronomical traits of the transgenic plants oyerexpressing OsDof12 and found that oyerexpressing OsDof12 could lead to reduced plant height, erected leaf, shortened leaf blade, and smaller panicle resulted from decreased primary and secondary branches number. These results implied that OsDof12 is involved in rice plant architecture formation. Furthermore, we performed a series of Brassinosteroid (BR)-responsive tests and found that oyerexpression of OsDof12 could also result in BR hyposensitiyity. Of note, in WT plants the expression of OsDo112 was found up-regulated by BR treatment while in OsDo112 oyerexpression plants two positive BR signaling regulators, OsBR11 and OsBZR1, were significantly down-regulated, indicating that OsDo112 may act as a negative BR regulator in rice. Taken together, our results suggested that overexpression of OsDof12 could lead to altered plant architecture by suppressing BR signaling. Thus, OsDof12 might be used as a new potential genetic regulator for future rice molecular breeding.

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