Dissertation Research: Asexuality and Parasitism by Mutualist Arbuscular Mycorrhizal Fungi

论文研究：互生丛枝菌根真菌的无性和寄生

• 批准号: 9801551
• 负责人: Janis Antonovics
• 金额: $ 1.04万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-15 至 2000-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9801551&HistoricalAwards=false
• 关键词: Dissertation; Research; Asexuality; Parasitism; Mutualist

9801551 Antonovics and Pringle Models on reproductive ecology of mutualisms have not been well developed or tested. Considering sexual vs. asexual reproduction, it has been hypothesized that mutualistic species that live inside other species, for example arbuscular mycorrhizal fungi that inhabit plant roots, should be asexual which would allow the perpetuation of well adapted genotypes. Sexual reproduction, in contrast, would create novel genotypes that might be less adapted to a host. Information on the reproductive biology of mutualists is necessary to test this notion. I plan to describe the genetic system of arbuscular mycorrhizal fungi as a first step in evaluating the asexual-predominance hypothesis for mutualisms. I also plan to test the benefits to plants of associations with arbuscular mycorrhizal fungi. This is necessary since a non-mutual relationship between fungi and plants due to environmental conditions or differing interactions with specific plants would provide situations that are inappropriate for testing the hypothesis.

9801551 Antonovics 和 Pringle 互利共生生殖生态学模型尚未得到很好的开发或测试。 考虑到有性繁殖与无性繁殖，人们假设生活在其他物种内部的共生物种，例如栖息在植物根部的丛枝菌根真菌，应该是无性的，这将允许良好适应的基因型永久存在。 相比之下，有性生殖会产生可能不太适应宿主的新基因型。 有关互利共生者生殖生物学的信息对于检验这一概念是必要的。 我计划描述丛枝菌根真菌的遗传系统，作为评估互利共生的无性优势假说的第一步。 我还计划测试与丛枝菌根真菌的关联对植物的益处。 这是必要的，因为由于环境条件或与特定植物的不同相互作用而导致真菌和植物之间的非相互关系将提供不适合检验假设的情况。