ACTA AGRICULTURAE BOREALI-SINICA ›› 2006, Vol. 21 ›› Issue (1): 14-18. doi: 10.3321/j.issn:1000-7091.2006.01.004

Special Issue: Drought and water saving Biotechnology

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Improvement of Perennial Ryegrass (Lolium perenne) Tolerance to Drought by Gene Transferring of Stress-inducible Transcription Factor CBF1 Gene

YANG Feng-ping1,2, LIANG Rong-qi2, ZHANG Li-quan2, CHEN Xu-qing2, ZHANG Xiao-dong2, WANG Guo-ying1, SUN Zhen-yuan3   

  1. 1. College of Biology Science, China Agricultural University, Beijing 100094, China;
    2. Beijing Agro-biotechnology Research Center, Beijing Agriculture and Forestry Academy, Beijing 100089, China;
    3. Chinese Academy of Forestry, Institute of Forestry Science, Beijing 100091, China
  • Received:2005-10-15 Published:2006-02-28

Abstract: In this research,two expression vectors pBAC122 and pBAC127 containing CBF1 gene were constructed, gene is driven by rd29B promoter,and bar gene driven by CaMV35S promoter as selection marker.By biolistic bombardment of PDS1000/He system,both expression vectors(pBAC122 was co-transferred with p35SIH3) were transformed into callus,immature embryos and mature embryos of perennerial ryegrass(Lolium perenne),respectively.After screening by Bialaphos and plant regeneration culture,36 transgenic plants were produced.The results of PCR and Dot-blotting analysis showed that foreign gene were well integrated into some transgenic plant's genome of ryegrass,respectively.Treatment of transgenic plants under water stress or 15%PEG,the free proline content of transgenic plants increase markedly,the increased extent was obviously higher than non-transgenic wild type.After 25 days of drought stress,3 transgenic lines behave green and living,and 1 transgenic lines restored living after watering.Our research suggested that using drought-inducible rd29B gene promoter to enhance the expression of foreign gene in ryegrass can greatly improve its tolerance to drought.

Key words: Perennial ryegrass, Transgenic, Free proline content, Tolerance to drought

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Cite this article

YANG Feng-ping, LIANG Rong-qi, ZHANG Li-quan, CHEN Xu-qing, ZHANG Xiao-dong, WANG Guo-ying, SUN Zhen-yuan. Improvement of Perennial Ryegrass (Lolium perenne) Tolerance to Drought by Gene Transferring of Stress-inducible Transcription Factor CBF1 Gene[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(1): 14-18. doi: 10.3321/j.issn:1000-7091.2006.01.004.