Dissertation Research: Fungal Community Effects on the Seed Bank of a Neotropical Tree

论文研究：真菌群落对新热带树木种子库的影响

基本信息

批准号：
0513812
负责人：
James Dalling
金额：
$ 1.14万
依托单位：
University of Illinois at Urbana-Champaign
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2005
资助国家：
美国
起止时间：
2005-07-01 至 2007-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0513812&HistoricalAwards=false
关键词：
Dissertation Research Fungal Community Effects

项目摘要

This research will examine the community composition, number of species, spatial structure and ecological importance of fungi infecting seeds of the tropical pioneer tree Cecropia insignis in two lowland forests in Panama and Costa Rica. This study will combine (i) measurements of seed mortality in the field with (ii) molecular analyses to determine the identities of fungi infecting C. insignis seeds, and (iii) re-inoculation of healthy seeds to determine which fungal cultures are pathogenic. Results of this study will provide the first assessment of the importance of fungal communities and focal fungal taxa in influencing demographics of a common tree species in tropical forests, and will provide the first detailed characterization of the identities and diversity of fungal communities associated with seeds of any tree, temperate or tropical. Comparisons of seed-fungal interactions of a single host species conducted at two of the best-studied tropical forests will add important new information regarding the diversity of fungi in soils at large spatial scales, and enhance our knowledge of fungal biodiversity overall. Isolates will be deposited in the Gilbertson Mycological Herbarium (University of Arizona), and maintained in a culture collection of tropical plant-associated microfungi. Novel genetic sequence data will be submitted to the on-line database Genbank.

这项研究将研究群落组成，物种的数量，空间结构和真菌感染了巴拿马和哥斯达黎加的两个低地森林中热带先驱树cecropia insignis的种子的生态重要性。这项研究将将（i）对田间种子死亡率的测量与（ii）分子分析相结合，以确定真菌感染c. insignis种子的身份，以及（iii）重新接种健康种子，以确定哪些真菌培养物具有致病性。这项研究的结果将首先评估真菌群落和局灶性真菌分类群在影响热带森林中一种常见树种的人口统计学中的重要性，并将提供与任何树木，温带或热带种子相关的真菌群落的身份和多样性的第一个详细表征。在两个最佳的热带森林中进行的单个宿主物种的种子习俗相互作用的比较将为大空间尺度上土壤中真菌的多样性增加重要的新信息，并增强我们对真菌生物多样性的了解。分离株将存放在吉尔伯逊菌落植物标本室（亚利桑那大学）中，并将其保存在热带植物相关的微伪造的培养基中。新型的遗传序列数据将提交到在线数据库GenBank。