Suppression of GhAGP4 gene expression repressed the initiation and elongation of cotton fiber

Yunjing Li, Diqiu Liu, Lili Tu, Xianlong Zhang, Li Wang, Longfu Zhu, Jiafu Tan, Fenglin Deng

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    43 Citations (Scopus)

    Abstract

    Cotton fibers, important natural raw materials for the textile industry, are trichomes elongated from epidermal cells of cotton ovules. To date, a number of genes have been shown to be critical for fiber development. In this study, the roles of genes encoding fasciclin-like arabinoglactan proteins (FLAs) in cotton fiber were examined by transforming RNA interfering (RNAi) construct. The RNAi according to the sequence of GhAGP4 caused a significant reduction of its mRNA level, and the expression of other three FLAs (GhAGP2, GhAGP3, GhFLA1) were also partially suppressed. The fiber initiation and fiber elongation were inhibited in the transgenic plants. As for the mature fibers of transgenic cotton, the fiber length became significantly shorter and the fiber quality became worse. In addition, the RNAi of GhAGP4 also affected the cytoskeleton network and the cellulose deposition of fiber cells. Through ovule culture, it was found that the expression of cotton FLA genes were upregulated by GA3, especially for GhAGP2 and GhAGP4. These results indicate that the FLAs are essential for the initiation and elongation of cotton fiber development.

    Original languageEnglish
    Pages (from-to)193-202
    Number of pages10
    JournalPlant Cell Reports
    Volume29
    Issue number2
    DOIs
    Publication statusPublished - Jan 2010

    Keywords

    • Cotton fiber
    • Elongation
    • Fasciclin-like arabinoglactan protein
    • Initiation
    • RNAi

    ASJC Scopus subject areas

    • Agronomy and Crop Science
    • Plant Science

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