Plant Biotechnology Reports

The Korean Society of Plant Biotechnology (한국식물생명공학회)
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Touch-induced gene (IbTCH1) from sweet potato [Ipomoea batatas (L.) Lam.]: molecular cloning and functional analysis

  • Seo, Sang-Gyu (Department of Environmental Horticulture, The University of Seoul) ;
  • Kim, Ji-Seong (Department of Environmental Horticulture, The University of Seoul) ;
  • Kang, Seung-Won (Department of Environmental Horticulture, The University of Seoul) ;
  • Shin, Mi-Rae (Department of Environmental Horticulture, The University of Seoul) ;
  • Yang, You-Sun (Department of Environmental Horticulture, The University of Seoul) ;
  • Lee, Gung-Pyo (Department of Applied Plant Science, College of Industrial Science, Chung-Ang University) ;
  • Hong, Jin-Sung (Plant Virus Bank, Division of Environmental and Life Science, Seoul Women's University) ;
  • Kim, Sun-Hyung (Department of Environmental Horticulture, The University of Seoul)
  • Received : 2008.07.28
  • Accepted : 2008.09.16
  • Published : 2008.11.30
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Abstract

The cDNA of the touch-induced genes (TCH) of the sweet potato [Ipomoea batatas (L.) Lam.] has been cloned and analyzed. IbTCH1, which exists as at least two-copy genes in the genome of the sweet potato, encodes for 148-amino acid polypeptides, and harbors four conversed $Ca^{2+}-binding$ motif EF-hands. IbTCH1 was shown to be expressed in the flower, leaf, thick pigmented root, and particularly in the white fibrous root, but expressed only weakly in the petiole. IbTCH1 is upregulated upon exposure to environmental stresses, dehydration, and jasmonic acid. Furthermore, IbTCH1 is developmentally regulated in the leaf and root. These results strongly indicate that the gene performs functions in both plant development and in defense/stress-signaling pathways.

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Acknowledgement

Supported by : University of Seoul