Mycorrhizal Cheaters in the Monotropoideae: Costs, Benefits, and Life History Traits of an Unholy Alliance.

Monotropideae 中的菌根作弊者：邪恶联盟的成本、收益和生活史特征。

• 批准号: 0108424
• 负责人: Thomas Bruns
• 金额: $ 31.24万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-15 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0108424&HistoricalAwards=false
• 关键词: Mycorrhizal; Cheaters; Monotropoideae; Costs; Benefits

DEB-0108424 BrunsEpiparasitic plants are not photosynthetic, and they indirectly obtain sugars from green plants through a mycorrhizal fungus that is connected to both plants. This behavior makes them cheaters of one of the most widespread mutualisms in terrestrial ecosystems. Our goals are to understand the costs and benefits of epiparasitic plants to their direct fungal and indirect plant hosts, and to examine life history traits related to the establishment of epiparasite seedlings. We address these goals through four specific hypotheses related to conditional changes in the symbiotic continuum, to effects on host-fungal competitive interactions, and to ecological mechanisms for host specificity. These hypotheses are tested by coupling symbiotic germination experiments in the field with manipulative growth chamber experiments. We use precise molecular identification of fungi and plants in both settings. Results will provide an in-depth understanding of the nature of the interactions at the plant-parasitic end the mycorrhizal symbiosis, will yield novel data on specificity, germination, and development of these plants, and will further develop a unique experimental system of symbiotic cheating. This information will increase of our knowledge of mycorrhizal symbiosis, and will help us to manage populations of some of the rare and endangered species in the Monotropoideae.

deb-0108424黑发植物不是光合作用的，它们通过与两种植物相关的菌根真菌间接地从绿色植物那里获得糖。 这种行为使他们成为陆地生态系统中最普遍的共同主义之一的作弊者。 我们的目标是了解表产植物对其直接真菌和间接植物宿主的成本和收益，并研究与建立表型幼苗有关的生活历史特征。 我们通过与共生连续性有条件变化有关的四个特定假设，对宿主 - 企业竞争相互作用的影响以及宿主特异性的生态机制来解决这些目标。 这些假设是通过与操纵生长室实验在现场的耦合共生发芽实验来检验的。 我们在两种情况下都使用真菌和植物的精确分子鉴定。 结果将对植物寄生虫末端的相互作用的性质提供深入的了解，菌根共生，将产生有关这些植物的特异性，发芽和发展的新数据，并将进一步发展出独特的共生作弊实验系统。 这些信息将增加我们对菌根共生的了解，并将帮助我们管理单粒类科中一些稀有和濒危物种的种群。