J Integr Plant Biol. ›› 2017, Vol. 59 ›› Issue (8): 531-534.DOI: 10.1111/jipb.12552

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Overexpression of GhFIM2 propels cotton fiber development by enhancing actin bundle formation

Min Zhang1,2,3, Li-Bo Han1,2, Wen-Yan Wang1,2,3, Shen-Jie Wu4, Gai-Li Jiao4, Lei Su1,2, Gui-Xian Xia1,2* and Hai-Yun Wang1,2*   

  1. 1Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
    2State Key Laboratory of Plant Genomics, Beijing 100101, China
    3University of Chinese Academy of Sciences, Beijing 100049, China
    4Institute of Cotton Research, Shanxi Academy of Agricultural Sciences, Yuncheng 044000, China
  • Received:2017-04-07 Accepted:2017-04-28 Published:2017-05-05
  • About author:**Correspondences: E-mail: Hai-Yun Wang (wanghy@im.ac.cn), Gui-Xian Xia (xiagx@im.ac.cn; Professor Xia is fully responsible for the distribution of all materials associated with this article.)


Cell elongation and secondary wall deposition are two consecutive stages during cotton fiber development. The mechanisms controlling the progression of these two developmental phases remain largely unknown. Here, we report the functional characterization of the actin-bundling protein GhFIM2 in cotton fiber. Overexpression of GhFIM2 increased the abundance of actin bundles, which was accompanied with accelerated fiber growth at the fast-elongating stage. Meanwhile, overexpression of GhFIM2 could propel the onset of secondary cell wall biogenesis. These results indicate that the dynamic rearrangement of actin higher structures involving GhFIM2 plays an important role in the development of cotton fiber cells.

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