Collaborative Research: Orchid-Fungal Interactions-A System for Testing Hypotheses about the Ecological Role and Distribution of Mycorrhizal Fungi in Affecting Plant Distribution

合作研究：兰花-真菌相互作用 - 检验菌根真菌影响植物分布的生态作用和分布假设的系统

• 批准号: 0316188
• 负责人: Timothy Filley
• 金额: $ 10万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0316188&HistoricalAwards=false
• 关键词: Collaborative; Research; Orchid; Fungal; Interactions

All terrestrial orchids require symbiotic fungi called mycorrhizae and can persist only when these fungi are present. They interact with a wide range of fungi - some orchids are extreme specialists, while others are generalists that can host many different fungi. The proposed study uses orchid-mycorrhizal associations as a model system to investigate the roles of symbiotic fungi and of the chemical composition of the substrate in regulating the distribution and growth of orchid host plants. To determine whether symbiotic fungi regulate the distribution of orchids, a series of laboratory and field experiments is proposed in which orchid seeds, fungal partners, litter substrates and abiotic factors (light, water) are manipulated. To determine how substrate quality affects orchid growth, carbon sources for seedling orchids will be determined under varying substrate, water and light regimes. This study will contribute fundamental knowledge about orchid-mycorrhizal interactions and about the nature of nutrient (carbon) acquisition under different stress (substrate quality, light, water) regimes. Results from this study research will substantially benefit conservation efforts. All three of the institutions involved in the project will include undergraduate students in research, and intern activities at the Smithsonian Institution that focus on minority institutions will be used to solicit student participation in the study.

所有陆地兰花都需要称为Mycorrhizae的共生真菌，并且只有在存在这些真菌时才能持续。他们与各种真菌互动 - 有些兰花是极端的专家，而另一些兰花是可以容纳许多不同真菌的通才。拟议的研究使用兰花 - 麦克罗济会的关联作为模型系统，以研究共生真菌的作用以及底物在调节兰花寄主植物的分布和生长中的化学组成。为了确定共生真菌是否调节兰花的分布，提出了一系列实验室和野外实验，其中对兰花种子，真菌伴侣，垃圾底物和非生物因素（光，水）进行操纵。为了确定底物质量如何影响兰花的生长，将在不同的底物，水和光制状态下确定幼苗兰花的碳源。这项研究将有助于有关兰花 - 麦糖相互作用以及在不同压力（底物质量，轻，水）方面获得营养（碳）获取性质的基本知识。这项研究的结果将大大受益于保护工作。该项目涉及的所有三个机构都将包括研究的本科生，并在史密森尼机构的实习活动将重点关注少数族裔机构来征求学生参与这项研究。