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      https://www.ias.ac.in/article/fulltext/jbsc/034/06/0941-0951

    • Keywords

       

      AGAMOUS-like; Arabidopsis; C-class; fibre; expression pattern; Gossypium barbadense

    • Abstract

       

      An AGAMOUS (AG)-like gene, GbAGL2, was isolated from Gossypium barbadense and characterized. Alignment and phylogenetic analysis indicated that GbAGL2 shared high homology with AG-subfamily genes and belonged to a C-class gene family. DNA gel blot analysis showed that GbAGL2 belonged to a low-copy gene family. Reverse transcriptase-polymerase chain reaction (RT-PCR) and quantitative real-time PCR (qPCR) revealed that GbAGL2 was highly expressed in reproductive tissues including ovules and carpels, but barely expressed in vegetative tissues. In addition, GbAGL2 expression in a cotton cultivar XuZhou142 (wt) (XZ142, G. hirsutum L.) and its fibreless mutant XZ142 (fl) was examined. RNA in situ hybridization analysis indicated that GbAGL2 transcripts were preferentially restricted to outer ovule integuments, carpels and fibres. These expression patterns implied that GbAGL2 might participate in the development of the carpel and ovule. Furthermore, Arabidopsis transformation was performed and modifications occurred in flowers, and the silique length of transgenic plants also increased slightly, suggesting that the GbAGL2 gene may have a positive effect on the development of the ovary or ovule. Our findings suggest that GbAGL2 might not only specify the identity of floral organs but also play a potential key role in ovary or fibre development in cotton.

    • Author Affiliations

       

      Xiang Liu1 Kaijing Zuo1 Fei Zhang1 Ying Li1 Jieting Xu1 Lida Zhang1 Xiaofen Sun2 Kexuan Tang1 2

      1. Plant Biotechnology Research Center, Fudan–SJTU–Nottingham Plant Biotechnology R & D Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
      2. State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai 200433, People’s Republic of China
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