Collaborative Research: Chemical and Sensory Basis of Hostplant Specificity

合作研究：寄主植物特异性的化学和感官基础

• 批准号: 9423997
• 负责人: Frances Chew
• 金额: $ 12.35万
• 依托单位: Tufts University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-15 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423997&HistoricalAwards=false
• 关键词: Collaborative; Research; Chemical; Sensory; Basis

9423997 Chew This research will provide basic information on the evolution of plant-insect relationships, using a model system of cabbage butterflies and Brassica plants. The different sensitivities of geographic subspecies of a butterfly to chemicals in potential hostplants will be examined to explain patterns of plant use. Also, differences between and within populations of butterflies will be studied to document the genetic variability in a given insect species. The chemical compounds responsible for acceptance or rejection of specific plants will be identified. Bioassays for effects on egg-laying, larval feeding and growth of the insects will be used to isolate the active compounds, and the extent to which taste or toxicity are involved will be determined. The results are expected to provide an integrated picture of the interactions between plant chemistry and insect responses at different insect and plant life stages and with changing resource availability. This research is expected to result in the identification of natural chemical compounds that defend plants against insects. Information on the most vulnerable stage of the insects will be obtained, so that an accurate picture of plant escape from herbivory may result. Since the project involves both native and introduced insects and plants, predictions about the development of new plant-insect associations my be possible. The research may also determine the likelihood that a native insect can adapt to the different chemistry of an aggressively spreading naturalized plant.

9423997咀嚼这项研究将提供有关植物-昆虫关系进化的基本信息，使用甘蓝蝴蝶和十字花科植物的模型系统。将研究蝴蝶地理亚种对潜在寄主植物中化学物质的不同敏感性，以解释植物的使用模式。此外，还将研究蝴蝶种群之间和种群内的差异，以证明特定昆虫物种的遗传变异性。将确定对特定植物的接受或拒绝负责的化合物。将使用对产卵、幼虫摄食和昆虫生长影响的生物测试来分离活性化合物，并确定其味道或毒性的程度。这些结果有望提供一幅植物化学和昆虫反应之间相互作用的综合图景，这些反应在不同的昆虫和植物生命阶段以及与不断变化的资源可获得性之间。这项研究有望鉴定出保护植物免受虫害的天然化合物。将获得有关昆虫最脆弱阶段的信息，从而可能得出植物逃离草食的准确图像。由于该项目涉及本地和引进的昆虫和植物，关于新的植物-昆虫协会的发展的预测是可能的。这项研究还可能确定一种本地昆虫适应一种积极传播的归化植物的不同化学物质的可能性。