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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (11): 52-57.doi: 10.11707/j.1001-7488.20141107

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Cloning of Transcription Factor DlSCL6 from Dendrocalamus latiflorus and Its Ectopic Expression in Arabidopsis thaliana

Yang Li1, Chen Dongliang1,2, Peng Zhenhua, Zhao Hansheng1, Gao Zhimin1   

  1. 1. Key Laboratory on the Science and Technology of Bamboo and Rattan International Center for Bamboo and Rattan Beijing 100102;
    2. Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Sciences Beijing 100097;
    3. Research Institute of Forestry, Chinese Academy of Forestry Beijing 100091
  • Received:2014-01-06 Revised:2014-04-18 Online:2014-11-25 Published:2014-12-04

Abstract:

HAM (Hairy Meristem) subfamily in GRAS family is a group of transcription factors that play important roles in plant growth and morphogenesis. By using RT-PCR and RACE technique, a HAM homologous gene, DlSCL 6 was cloned from Dendrocalamus latiflorus. This gene has 2 006 bp in full-length including the 5' untranslated region (UTR) of 129 bp, 3' UTR of 266 bp, and coding region of 1 611 bp. DlSCL6 protein has five conserved domains (LHR Ⅰ, VHIID, LHR Ⅱ, PFYRE, and SAM), and is relatively high consistent to SCL6 proteins in some monocots, and some consistent of 43% to the Arabidopsis thaliana. A recombinant protein with approximately 60 kDa was obtained in the expression of this gene in Escherichia coli. The sense transgenic plants derived from ectopic expression of DlSCL 6 in A. thaliana showed prolonged vegetative growth, delayed flowering, and increased rosette leaf number, while the antisense transgenic plants had early flowering and thin plants and significantly reduced rosette leaves number. This study indicates that DlSCL 6 gene can influence the shoot apical meristem status, and hence result in changes in morphogenesis.

Key words: Dendrocalamus latiflorus, transcription factor, Arabidopsis thaliana, ectopic expression

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