Concerted biosynthesis of an insect elicitor of plant volatiles
Concerted biosynthesis of an insect elicitor of plant volatiles
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DOI：
10.1073/pnas.95.23.13971
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发表时间：
1998-11-10
影响因子：
11.1
通讯作者：
Tumlinson, JH
中科院分区：
文献类型：
--
作者：
Paré, PW;Alborn, HT;Tumlinson, JH
包括玉米在内的各种农业植物物种通过释放大量挥发性化合物来应对昆虫食草动物的损害，因此对攻击食草动物的寄生蜂具有高度吸引力。N-（17-羟基亚麻酰）-L-谷氨酰胺是一种植物挥发性物质的诱导剂，从甜菜夜蛾幼虫中分离得到，是植物识别害虫危害的关键成分。对以（13）C标记的玉米幼苗为食的甜菜夜蛾的口腔分泌物进行化学分析，确定volicitin的脂肪酸部分是植物来源的，而17-羟基化反应和与谷氨酰胺的缀合是由毛虫通过使用昆虫来源的谷氨酰胺进行的。具有讽刺意味的是，这些昆虫催化的亚麻酸化学修饰对于触发植物挥发物释放的生物活性是至关重要的，植物挥发物又吸引毛虫的天敌。
A variety of agricultural plant species, including corn, respond to insect herbivore damage by releasing large quantities of volatile compounds and, as a result, become highly attractive to parasitic wasps that attack the herbivores. An elicitor of plant volatiles, N-(17-hydroxylinolenoyl)-L-glutamine, named volicitin and isolated from beet armyworm caterpillars, is a key component in plant recognition of damage from insect herbivory. Chemical analysis of the oral secretion from beet armyworms that have fed on (13)C-labeled corn seedlings established that the fatty acid portion of volicitin is plant derived whereas the 17-hydroxylation reaction and the conjugation with glutamine are carried out by the caterpillar by using glutamine of insect origin, Ironically, these insect-catalyzed chemical modifications to linolenic acid are critical for the biological activity that triggers the release of plant volatiles, which in turn attract natural enemies of the caterpillar.