A Major Jasmonate-Inducible Protein of Sweet Potato, Ipomoelin, is an ABA-Independent Wound-Inducible Protein
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概要
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Treatment of sweet potato plants cultured in vitro with a vapor of methyl jasmonate (MeJA) induced an accumulation in leaves of a large amount of protein with an apparent molecular mass of 18 kDa. This protein, designated ipomoelin, was purified, and the amino acid sequences of proteolytic fragments were determined. Screening a cDNA library of MeJA-treated leaves by oligonucleotide probes designed from the peptide sequences identified a clone that could code for a polypeptide with 154 amino acids. The deduced amino acid sequence of ipomoelin showed an overall amino acid identity of 25% With the salt-inducible SalT protein of rice. In addition, the C-terminal 70 amino acid sequence of ipomoelin showed about 50% identity with the C-terminal amino acid sequences of seed lectins from Moraceae. The gene for ipomoelin was present in a few copies in the genome of sweet potato. The mRNA for ipomoelin was detected in leaves and petioles, but not in stems and tuberous roots, of sweet potato plants grown in the field. Mechanical wounding of leaves induced ipomoelin mRNA both locally and systemically, while treatment of leaves with ABA, salt, or a high level of sucrose did not induce ipomoelin mRNA. By contrast, ABA-inducible mRNA for sporamin was not induced by MeJA. These results suggest that ipomoelin is involved in defensive reactions of leaves in response to wounding and that JA-mediated wound-induction of ipomoelin occurs independently of ABA.
- 日本植物生理学会の論文
著者
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MORIKAMI Atsushi
Faculty of Agriculture, Meijo University
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NAKAMURA Kenzo
Laboratory of Biochemistry, Graduate School of Bioagricultural Sciences, Nagoya University
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Matsuoka K
Nagoya Univ. Nagoya Jpn
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Matsuoka Ken
Laboratory Of Biochemistry School Of Agricultural Sciences Nagoya University
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Matsuoka Ken
Lab. Biochem. Grad. School Of Bioagr. Sci. Nagoya Univ.
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Nakamura K
Nagoya Univ. Nagoya Jpn
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Matsuoka Ken
Laboratory Of Biochemistry Faculty Of Agriculture Nagoya University
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Matsuoka Ken
Plant Science Center Riken
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Morikami Atsushi
Laboratory Of Biochemistry School Of Agriculture Nagoya University
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Morikami Atsushi
Faculty Of Agriculture Meijo University
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Imanishi Shunsuke
Laboratory Of Biochemistry Department Of Biological Mechanisms And Functions Graduate School Of Bioa
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Imanishi Shunsuke
Laboratory Of Biochemistry Graduate School Of Bioagricultural Sciences Nagoya University
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Kito-Nakamura Kyoko
Laboratory of Biochemistry, School of Agricultural Sciences, Nagoya University
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Morikami Atsushi
Laboratory Of Biochemistry Department Of Cellular Mechanisms And Functions Graduate School Of Bioagr
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Kito-nakamura Kyoko
Laboratory Of Biochemistry School Of Agricultural Sciences Nagoya University
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Nakamura Kenzo
Department Of Biological Mechanisms And Functions Graduate School Of Bioagricultural Sciences Nagoya
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Nakamura Kenzo
Laboratory Of Biochemistry Faculty Of Agriculture Nagoya University
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Nakamura K
Ecomolecular Biorecycling Science Research Team Riken Advanced Science Institute
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Atsushi Morikami
Faculty Of Agriculture Meijo University
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