Animal cells and systems

The Korean Society for Integrative Biology (한국통합생물학회)
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Molecular Characterization of a PR4 Gene in Chinese Cabbage

  • Chung, Sam-Young (Division of Life Sciences, College of Natural Sciences, Chungbuk National University) ;
  • Lee, Kyung-Ah (Division of Life Sciences, College of Natural Sciences, Chungbuk National University) ;
  • Oh, Kyung-Jin (Division of Life Sciences, College of Natural Sciences, Chungbuk National University) ;
  • Cho, Tae-Ju (Division of Life Sciences, College of Natural Sciences, Chungbuk National University)
  • Published : 2005.12.01
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Abstract

A cDNA clone for a wound- and pathogen-induced gene in Chinese cabbage (Brassica rapa subsp. pekinensis) was isolated and characterized. The cabbage gene, designated BrPR4, encodes a pathogenesis-related protein 4 (PR4) of 140 amino acids. The BrPR4 protein shows high similarity with wound-inducible antifungal proteins of tobacco, potato, barley, and wheat. The BrPR4 gene is locally induced by a nonhost pathogen, Pseudomonas syringae pv. tomato, that elicits a hypersensitive response in Chinese cabbage. Treatment of the cabbage leaves with benzothiadiazole (BTH), methyl jasmonate or ethephon showed that the BrPR4 gene expression is strongly induced by ethylene, but not by methyl jasmonate or BTH. The BrPR4 gene is also activated by wounding. Interestingly, however, the wound-inducible BrPR4 gene expression is repressed by salicylic acid or BTH, suggesting that there is cross-talk between salicylate-dependent and -independent signaling pathways.

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References

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