REU: Reciprocal Relationships of Distant Sagebrush Communities with Their Mycorrhizal Fungi

三齿蒿（蒿属）是分布最广的 分布在北美的灌木，是当地的优势， 许多社区，部分原因是生理和遗传 特色 A. tridentata及其 将检查菌根真菌群落，以确定 内生菌-宿主关系的局部适应性 在灌木的广泛分布。 这些事实是 对这段关系特别感兴趣。 这种灌木有高达2.5 菌根侵染使生物量增加10倍。 关联 种菌根真菌是热带起源在南部 地点和温带起源的北方网站。 不同 不同种类的菌根真菌具有不同的生理效应 所以当地的真菌群落可以解释 的灌木。 无论是描述性的还是功能性的， 包括对泡囊-丛枝菌根 真菌群落结构分析tridentata在整个 分布和相互移植。tridentata及其 在南加州和 怀俄明州西南部将被占领。 一支跨学门的研究团队 的研究人员将测量形态，解剖， 生理和真菌参数，以确定成功的 移植 测量结果将使用 概念层次模型 这些数据将用于排序 找出地点、植物种群和真菌之间的差异 种群和属对A. tridentata和 它在地理位置偏远的站点上持久存在的能力。

Artemisia tridentata (sagebrush) is the most widely distributed shrub in North America and is the local dominant in many communities, due in part to physiological and genetic characteristics. The relationships of A. tridentata with its mycorrhizal fungal communities will be examined to determine if local adaptations of the endophyte-host relationship have a role in the wide distribution of the shrub. These facts are of special interest in this relationship. The shrub has up to a 2.5 times increase in biomass with mycorrhizal infection. Associated species of mycorrhizal fungi are of tropical origin in southern sites and of temperate origin in the northern sites. Different species of mycorrhizal fungi have different physiological effects on this host so local fungal communities may explain the success of the shrub. Both descriptive and functional approaches, including an examination of vesicular-arbuscular mycorrhizal fungal communities in stands of A. tridentata throughout its distribution and reciprocal transplants of A. tridentata and its associated fungi between sites in Southern California and Southwestern Wyoming, will be taken. An interdisciplinary team of researchers will measure morphological, anatomical, physiological, and fungal parameters to determine success of the transplants. The measurements will be integrated using a conceptual hierarchical model. These data will be used to sort out differences between sites, plant populations, and fungal populations and genera on local adaptations of A. tridentata and its ability to persist in geographically remote sites.