Ultraviolet-induced Accumulation of Phytoalexins in Rice Leaves(Pesticide Chemistry)
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概要
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Accumulated phytoalexins in ultraviolet-irradiated detached rice leaves were detected by gas chromatography-mass spectrometry-selected ion monitoring (GC-MS-SIM) after pretreating with a BOND ETUTC_<18> cartridge. An accumulation of oryzalexins A, B, C and D, momilactones A and B, and an unknown antifungal substance accompanied by the appearance of brown spots on the leaf surface was observed. Momilactone A was detected in abundance, and among the oryzalexins, oryzalexin D was a major substance. The maximum accumulation of these phytoalexins, except for oryzalxins C and D, was found 3 days after irradiation. However, the maximum accumulation of oryzalexin D was observed 2 days after irradiation and that of oryzalexin C was observed 4 days after it. The content of these diterpenoid phytoalexins in rice leaves was dependent on leaf aging, an accumulation of these phytoalexins in the uppermost leaves being much lower than that in the aged leaves (lower leaves), and brown spots scarcely ever appeared on the surface of the uppermost leaves.
- 社団法人日本農芸化学会の論文
- 1988-10-23
著者
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SUZUKI Takashi
Laboratory of molecular and cellular interaction, Faculty of Advanced Life Science, Hokkaido Univers
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Kodama Osamu
Laboratory Of Agricultural Chemicals Faculty Of Agriculture Ibaraki University
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Akatsuka Tadami
Laboratory Of Agricultural Chemicals Faculty Of Agriculture Ibaraki University
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MIYAKAWA Junichi
Laboratory of Agricultural Chemicals, Faculty of Agriculture, Ibaraki University
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Miyakawa Junichi
Laboratory Of Agricultural Chemicals Faculty Of Agriculture Ibaraki University
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Suzuki Takashi
Laboratory Of Agricultural Chemicals Faculty Of Agriculture Ibaraki University
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