摘要
茉莉酸是植物体内重要的伤信号分子 ,向植物施用外源茉莉酸后 ,可诱导植物产生各种防卫反应 ,如挥发物组成发生改变等 ,进而影响植食性昆虫及其天敌。该文报道用不同浓度外源茉莉酸处理白菜和甘蓝后 ,诱导植物反应所产生的挥发物对菜蛾绒茧蜂搜索及寄生选择行为的影响。外源茉莉酸处理白菜和甘蓝后 ,处理植株的挥发物对菜蛾绒茧蜂的引诱力增强 ;与在对照植株上相比 ,该蜂对经茉莉酸处理后白菜植株上的小菜蛾幼虫的寄生数显著要高。表明茉莉酸处理白菜及甘蓝后 ,植物诱导反应导致其挥发物的作用发生变化 。
Jasmonic acid (JA) is a group of important signal molecules carrying information about injury in plants. Application of exogenous jasmonic acid to plants can induce them to produce various defense responses, such as changes in composition of volatiles, which in turn affect phytophagous insects and their natural enemies. We report here the effects of Chinese cabbage and common cabbage volatiles induced by exogenous jasmonic acid on the host searching and selection behavior of a hymenopteran parasitoid Cotesia plutellae. For both Chinese cabbage and common cabbage JA-treated plants produced volatiles more attractive to adult females than untreated plants. Compared with untreated plants, the number of Plutella xylostella larvae parasitized by C. plutellae on JA-treated plants of Chinese cabbage was significantly higher. These results demonstrate that application of exogenous jasmonic acid on Chinese cabbage and common cabbage can make these plants more attractive to the parasitoid, and thereby promote its efficiency of host foraging.
出处
《昆虫学报》
CAS
CSCD
北大核心
2004年第2期206-212,共7页
Acta Entomologica Sinica
基金
国家自然科学基金项目 ( 3 993 0 12 0 )
关键词
外源茉莉酸
白菜
甘蓝
菜蛾绒茧蜂
寄主搜索
寄生选择
Exogenous jasmonic acid
Chinese cabbage
common cabbage
Cotesia plutellae
host foraging
oviposition preference
