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Effects of Host Plant Water-Stress on Herbivorous Insects in Three Feeding Guilds

寄主植物水分胁迫对三个取食行业草食昆虫的影响

基本信息

批准号：
9112013
负责人：
Edward Connor
金额：
$ 17.5万
依托单位：
University of Virginia Main Campus
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1991
资助国家：
美国
起止时间：
1991-09-15 至 1996-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9112013&HistoricalAwards=false
关键词：
Effects Host Plant Water Stress

项目摘要

The theory that "water-stress" improves the nutritional quality of plants for insect herbivores and leads to outbreaks has received much support. Although studies report improved performances for insects fed water-stressed foliage others have shown that insects either avoid or grow poorly on water-stressed plant. It appears that Orthoptera and sapfeeding insects tend to benefit from plant water-stress, but leaf chewers and skeletonizers do not. The P.I. Will test the hypothesis and that the effect of water-stress in plants on herbivorous insects depends on the feeding mode of the insect. He will perform preferences and controlled rearing experiments examine the effects of water- stress in the host plant on feeding and oviposition preference, growth, survival, and fecundity in ten insect species distributed among three feeding guilds and four insect orders. Soybeans will be the experiments since the physiology and biochemistry of soybean under water-stress is well known. These experiments will enhance our knowledge of the interactions of soybean with several of its insect pests, and allow the identification of the effects of water-stress in plants on insects herbivores depends on insect feeding mode. This information will help explain the complex responses of insects to water-stressed plants.

“水分胁迫”提高了食草昆虫植物的营养质量并导致爆发的理论得到了很多支持。虽然有研究报告说，以缺水的叶子为食的昆虫的表现有所改善，但也有研究表明，昆虫要么避开缺水的植物，要么在缺水的植物上生长不良。似乎直翅目昆虫和食腐昆虫倾向于从植物的水分胁迫中受益，但咀嚼树叶的昆虫和骨骼动物却没有。P.I.将检验这个假设，即植物中的水分胁迫对食草昆虫的影响取决于昆虫的摄食方式。他将进行偏好和控制饲养实验，研究寄主植物的水分胁迫对10种昆虫的取食和产卵偏好、生长、存活和繁殖力的影响，这些昆虫分布在3个取食行业和4个昆虫目中。由于大豆在水分胁迫下的生理生化特性是众所周知的，因此将大豆作为试验对象。这些实验将增加我们对大豆与几种害虫相互作用的认识，并使我们能够确定植物水分胁迫对昆虫的影响，昆虫的摄食方式取决于昆虫的摄食方式。这一信息将有助于解释昆虫对缺水植物的复杂反应。