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Acta Prataculturae Sinica ›› 2009, Vol. 18 ›› Issue (1): 65-71.

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Construction of a cDNA library of the leaf of Leymus chinensis and analysis of partial expressed sequence tags

WANG Li-juan1, JIN Zhi-ping1, WANG Neng-fei2, LI Xiao-feng1, LIU Gong-she1   

  1. 1.Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;
    2.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
  • Received:2008-01-21 Online:2009-01-25 Published:2009-02-20

Abstract: Total RNA of Leymus chinensis (“Jishengyihao”) leaves was isolated by TRIZOL reagent and a cDNA library was constructed using SMART technology. The primary library had a high titer of 106 cfu/mL, in which 98% of the clones were recombinant and the insert cDNAs were from 0.5 kb to 3.0 kb. The amplified library had a titer of 1011 cfu/mL. The positive signals of TC and γ-TMT gene were detected by PCR of the amplified library. High quality sequences were shown by 307 of the cDNA clones.In the cDNA library, 117 clones were non-redundant, and BLAST led to the identification of several putative genes (e.g. glyceraldehyde-3-phosphate, RNase S-like protein precursor, translation elongation factor 1, translation initiation factor 1A, chloroplast psbA gene for D1 protein). This high quality cDNA library provides a useful tool for further study of the molecular mechanisms of the secondary metabolism of vitamin E and of gene expression in L. chinensis.

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