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The Effect of Induced Resistance on Herbivore Population Dynamics

诱导抗性对草食动物种群动态的影响

基本信息

批准号：
9615227
负责人：
Mark Rausher
金额：
$ 14.6万
依托单位：
Duke University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1997
资助国家：
美国
起止时间：
1997-03-01 至 1999-02-28
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9615227&HistoricalAwards=false
关键词：
Effect Induced Resistance Herbivore Population

项目摘要

RAUSHER DEB-9615227 The chemical content of plants affects insect survival and reproduction and thus may influence the size of insect populations. In a phenomenon known as induced resistance, some plants respond to herbivore attack by producing new compounds which negatively affect insect growth and reproduction. Understanding the effects of inducible resistance on insect herbivores is important for understanding herbivore population regulation because the strength of the response may increase as insect populations and insect damage increases. Consequently, inducible resistance may be a negative feed-back mechanism that helps regulate insect populations. The investigator will perform experiments with soybeans and Mexican bean beetles to determine whether induced resistance can regulate insect populations. Soybean cultivars that vary genetically in inducible response will be used to compare the population dynamics of the bean beetle on soybean cultivars with high and low levels of inducible response. The PI will use computer modeling to investigate what conditions make regulation by induced resistance possible. It is important to understand how herbivore populations are regulated because insects strongly affect the yield of commercially important plants. If inducible resistance can control insect populations, agricultural breeders may want to include induced resistance in their breeding programs. Inducible resistance may be preferable to the use of constant levels of plant defense because induced resistance may slow the insect's development of resistance to plant defenses.

RAUSHER DEB-9615227 植物的化学含量影响昆虫的生存和繁殖，从而可能影响昆虫种群的规模。在一种称为诱导抗性的现象中，一些植物通过产生对昆虫生长和繁殖产生负面影响的新化合物来应对食草动物的攻击。了解诱导抗性对昆虫食草动物的影响对于了解食草动物种群调节非常重要，因为响应的强度可能会随着昆虫种群和昆虫损害的增加而增加。因此，诱导抗性可能是一种负反馈机制，有助于调节昆虫种群。研究人员将用大豆和墨西哥豆甲虫进行实验，以确定诱导的抗性是否可以调节昆虫种群。诱导反应基因不同的大豆品种将用于比较具有高水平和低水平诱导反应的大豆品种上豆甲虫的种群动态。 PI 将使用计算机模型来研究哪些条件可以通过诱导阻力进行调节。了解食草动物种群如何受到调节非常重要，因为昆虫强烈影响具有商业价值的植物的产量。如果诱导抗性可以控制昆虫种群，农业育种者可能希望将诱导抗性纳入其育种计划中。诱导抗性可能比使用恒定水平的植物防御更可取，因为诱导抗性可能减缓昆虫对植物防御的抗性的发展。