P-19 キヒトデAsterias amurensis Lutkenから得られた新規スフィンゴ脂質と植物生育促進作用(ポスター発表の部)

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A large number of studies on the isolation and structure elucidation of sphingolipids from starfish have been reported. These compounds are the predominant metabolites of starfish and include a broad variety of pharmacological activities. In recent years, outbreak of starfish in Hokkaido causes serious damage to the fishery and aquacultural grounds for benthic shellfish. Although such starfish is a nuisance to fishermen, the collected starfish can be used as fertilizer. In our preliminary growth test, starfish compost mix showed plant-growth promoting effect to the plant Brassica campestris (Komatsuna). Thus, we investigated Asterias amurensis Lutken as a source of plant-growth promoters. A bioassay-guided separation of both hot water and methanol extracts from A. amurensis gave several active fractions which showed plant-growth promoting effect. A new glucocerebroside, asteriacerebroside G (1) and a new ceramide, asteriaceramide A (2), together with two known compounds, asteriacerebrosides A and B were isolated from the lipophilic fractions from the methanol extract. Three asteriacerebrosides had promotive effect on the entire plant body of B. campestris. On the other hand, asteriaceramide A (2) exhibited a root growth promoting effect. Moreover, the aqueous fraction from the water extract contained a sulfur-containing guanidine derivative, asterubine. In order to study the effect of active asterubine, we produced synthetic asterubine. The promotive activity of natural asterubine was equivalent to that of the synthesized product. These active compounds from unutilized natural resource A. amurensis could be employed as useful plant-growth regulators in a number of agricultural technologies in the future.
天然有機化合物討論会の論文
2006-09-15

P-19 キヒトデAsterias amurensis Lutkenから得られた新規スフィンゴ脂質と植物生育促進作用(ポスター発表の部)

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