Molecules and Cells

Korean Society for Molecular and Cellular Biology (한국분자세포생물학회)
권호 표지

Transgenic Tobacco Expressing the hrpNEP Gene from Erwinia pyrifoliae Triggers Defense Responses Against Botrytis cinerea

  • Sohn, Soo-In (National Institute of Agricultural Biotechnology, Rural Development Administration) ;
  • Kim, Yul-Ho (National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Byung-Ryun (Chungcheongnam-Do Agricultural Research and Extension Services) ;
  • Lee, Sang-Yeob (National Institute of Agricultural Science and Technology, Rural Development Administration) ;
  • Lim, Chun Keun (College of Agriculture and Life Sciences, Kangwon National University) ;
  • Hur, Jang Hyun (College of Agriculture and Life Sciences, Kangwon National University) ;
  • Lee, Jang-Yong (National Institute of Crop Science, Rural Development Administration)
  • Received : 2007.03.23
  • Accepted : 2007.05.28
  • Published : 2007.10.31
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Abstract

$HrpN_{EP}$, from the gram-negative pathogen, Erwinia pyrifoliae, is a member of the harpin group of proteins, inducing pathogen resistance and hypersensitive cell death in plants. When the $hrpN_{EP}$ gene driven by the OsCc1 promoter was introduced into tobacco plants via Agrobacterium-mediated transformation, their resistance to the necrotrophic fungal pathogen, Botrytis cinerea, increased. Resistance to B. cinerea was correlated with enhanced induction of SA-dependent genes such as PR-1a, PR2, PR3 and Chia5, of JA-dependent genes such as PR-1b, and of genes related to ethylene production, such as NT-EFE26, NT-1A1C, DS321, NT-ACS1 and NT-ACS2. However the expression of NPR1, which is thought to be essential for multiple-resistance, did not increase. Since the pattern of expression of defense-related genes in $hrpN_{EP}$-expressing tobacco differed from that in plants expressing $hpaG_{Xoo}$ from Xanthomonas oryzae pv. Oryzae, these results suggest that different harpins can affect the expression of different defense-related genes, as well as resistance to different plant pathogens.

Keywords

Acknowledgement

Supported by : RDA

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