Absolute Configuration of Volicitin from the Regurgitant of Lepidopteran Caterpillars and Biological Activity of Volicitin-Related Compounds
作者:Yoshitsugu SAWADA、Naoko YOSHINAGA、Kenji FUJISAKI、Ritsuo NISHIDA、Yasumasa KUWAHARA、Naoki MORI
DOI:10.1271/bbb.60133
日期:2006.9.23
Volicitin [N-(17-hydroxylinolenoyl)-L-glutamine] and N-linolenoyl-L-glutamine are known as insect-produced plant volatile elicitors. The absolute configuration of the hydroxylinolenoyl moiety of volicitin from three noctuid species, Helicoverpa armigera, Mythimna separata and Spodoptera litura, was determined to be all 17S in high enantiomeric excess. When treated with 30 pmol of (17S)- and (17R)-volicitin, corn seedlings were induced to release volatiles, there being no significant difference in the amount released between the two isomers. On the other hand, N-linolenoyl-L-glutamine was only about 30% as active as volicitin. Among several synthesized N-linolenoylamino acid conjugates, only the L-glutamine conjugate induced the emission of volatile organic compounds. These results show that the L-glutamine moiety of volicitin played a more critical role than the hydroxyl moiety, although both moieties affected the elicitor activity inducing the release of volatiles.
已知伏立替汀[N-(17-羟基亚麻酸酰基)-L-谷氨酰胺]和 N-亚麻酸酰基-L-谷氨酰胺是昆虫产生的植物挥发性激发剂。经测定,来自三种夜蛾(Helicoverpa armigera、Mythimna separata 和 Spodoptera litura)的伏立特素羟基亚麻酰基的绝对构型均为 17S,对映体过量。用 30 pmol 的(17S)- 和(17R)-伏立奎宁处理玉米幼苗,诱导其释放挥发性物质,两种异构体释放的量没有显著差异。另一方面,N-亚麻酸酰-L-谷氨酰胺的活性只有伏立替汀的 30%。在几种合成的 N-亚麻酸酰氨基共轭物中,只有 L-谷氨酰胺共轭物能诱导挥发性有机化合物的释放。这些结果表明,伏立替汀的 L-谷氨酰胺分子比羟基分子起着更为关键的作用,尽管这两个分子都会影响诱导剂释放挥发性有机化合物的活性。