80(P-77) スギ葉部の殺カワニナ成分について(ポスター発表の部)
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概要
- 論文の詳細を見る
Luciola cruciata (firefly) is a representative environmental and rare insect, some of which are protected in habitat. Recently, a number of Luciola cruciata have been decreased due to river pollution. Semisulcospira bensoni is essential for the larvae of Luciola cruciata to live in the river. We have envisaged that artificially made forests composed mainly of Japanese ceders (Cryptomeria japonica) may cause decrease of S. bensoni. Thus, we have investigated lethal components in Japanse ceder against S. bensoni. The CH_2Cl_2, MeOH and H_2O extracts of Cryptomeria japonica were examined for lethal and repellent activities against Semisulcospira bensoni. As results, the CH_2Cl_2 extract was found to be most active. Bioassay-guided fractionation led to the isolation of five labdane-type diterpenes 1-5 and one pimarane-type diterpene 6, all of which were oxidized at the C-19 position. Their lowest concentration for lethal activity were 5-10ppm. Compound 7 which was not oxidized at the C-19 position had no lethal activity at all. These results suggested that the oxidative stage at the C-19 position play an important role in lethal activity. Next, our attention has been focused on analyzing if the active compounds are present or not in river water around the area planted with C. japonica. The analysis of river water was carried out by using HPLC-MS, which could not only identify but also determine the target molecules even at low concentration (ppb). The water analysis was carried out at the three points in the Kawata river (Tokushima). Consequently, the low concentration of compounds 1, 3 and 4 was detected at the points land II.
- 天然有機化合物討論会の論文
- 2000-10-01
著者
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福山 愛保
Faculty of Pharmaceutical Sciences, Tokushima Bunri University
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福山 愛保
徳島文理大薬
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福山 愛保
徳島文理薬
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島田 貴章
徳島文理薬
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三並 博行
徳島文理薬
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上田 育賢
徳島文理薬
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