Overexpression of GhFIM2 propels cotton fiber development by enhancing actin bundle formation. Issue 8 (4th July 2017)

• Record Type: Journal Article
• Authors: Zhang, Min; Han, Li‐Bo; Wang, Wen‐Yan; Wu, Shen‐Jie; Jiao, Gai‐Li; Su, Lei; Xia, Gui‐Xian; Wang, Hai‐Yun
• Is Part Of: Journal of integrative plant biology. Volume 59:Issue 8(2017)
• Page Start: 531
• Page End: 534
• Publication Date: 2017-07-04
• Subjects: Plants -- Periodicals; Plants -- China -- Periodicals; Electronic journals; 580.5
• DOI: 10.1111/jipb.12552
• Languages: English
• ISSNs: 1672-9072

Abstract

Summary: 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. Abstract : This study demonstrated that actin bundling protein GhFIM2 is involved in the dynamic remodeling of actin cytoskeleton in developing cotton fiber. Overexpression of GhFIM2 accelerated the fiber cell growth at the fast‐elongating stage and led to an early deposition of the secondary cell wall.