Dissertation Research: Role of Light in Determining the Costs and Benefits of Extrafloral Nectar Production in Two Costa Rican Passiflora Species

论文研究：光在确定两种哥斯达黎加西番莲品种花外花蜜生产的成本和效益中的作用

• 批准号: 9123066
• 负责人: Doyle McKey
• 金额: $ 0.63万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-01 至 1995-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9123066&HistoricalAwards=false
• 关键词: Dissertation; Research; Role; Light; Determining

Although many researchers propose that the balance between costs of plant defenses and the cost of herbivory have influenced both the types of defenses a plant employs and the distribution of those defenses among plant structure, no study to date has fully evaluated these costs in a quantitative fashion nor has anyone determined how these costs are affected by the plant's access to light and other resources. To address this question, the relationship between costs of extrafloral nectar production in two closely related Passiflora species that differ in the range of light conditions in which they grow will be studied. The proposed project provides several advantages over previous approaches to the study of costs and benefits of defense. Extrafloral nectar, unlike many toxic chemical defenses, has a simple chemical composition and can be measured in a non-destructive fashion. Further, protection associated with extrafloral nectar production can be evaluated by comparing untreated plants to plants from which ants have been excluded. Finally, by using population projection matrices to model plant growth, the costs of defense and herbivory can be expressed in terms of a fitness component. Thus, extrafloral nectar-based ant defense may represent an ideal system for the study of costs and benefits of leaf defense.

尽管许多研究人员认为， 植物防御的成本和食草动物的成本 工厂采用的防御类型和防御的分布 植物结构中的这些防御，迄今为止还没有研究完全 以定量的方式评估这些成本， 确定这些成本如何受到工厂获得的影响 光和其他资源。 为了解决这个问题， 花外花蜜生产成本之间的关系 与西番莲属植物密切相关的物种， 将研究它们生长的光照条件。 拟议 项目提供了几个优势，比以前的方法， 研究防御的成本和收益。 花外花蜜，不像 许多有毒的化学防御，具有简单的化学成分， 可以以非破坏性的方式测量。 此外，保护 与花外花蜜生产相关的，可以通过 将未经处理的植物与蚂蚁从其上取食的植物进行比较， 排除 最后，通过使用人口投影矩阵， 模型植物生长，防御和草食动物的成本可以是 用适应度分量表示。 因此，花外 基于花蜜的蚂蚁防御可能代表了一个理想的系统， 叶防御的成本和收益的研究。