US-India Cooperative Research: Molecular Diversity of Actinorhizal Symbionts Found in the Sikkim Region of the Eastern Himalayas

该奖项支持美国-印度关于东喜马拉雅锡金地区发现的放线菌共生体分子多样性的合作研究项目。俄勒冈州立大学的美国皮大卫·米罗尔德和印度东北希尔大学的皮阿文德·米斯拉将研究喜马拉雅东部几种光生组织植物结瘤的Frankia的分子多样性。这项研究扩展了以前对Frankia的分子多样性的研究，Frankia是一种重要的固氮细菌属，包括来自印度山地地区的菌株。其目的是：1)评估Frankia的分子多样性随寄主植物和地理位置的变化；2)利用序列信息添加到Frankia当前的系统发育树中。范围：这项工作建立在PI在使用分子方法研究Frankia方面的联合专业知识的基础上。研究结果将补充在北美和大洋洲进行的研究，这些研究在寄主植物物种或环境因素作为Frankia多样性决定因素的相对重要性方面得出了不同的结果。实际上，这项研究在尝试使用放线菌植物重建植被和恢复工作方面可能会被证明是有用的，因为它们是受干扰地点的重要早期殖民者。该奖项由国际项目部和环境生物学部共同支持。

0096793Myrold Description: This award supports a US-India cooperative research project on Molecular Diversity of Actinorhizal Symbionts Found in the Sikkim Region of the Eastern Himalayas. US PI David Myrold, Oregon State University and Indian co-PI Arvind Misra, North Eastern Hill University, Shillong will study the molecular diversity of Frankia that nodulate several actinorhizal plants in the eastern Himalayas. This research extends previous studies on the molecular diversity of Frankia, an important N2 -fixing bacteria genus, to include strains from the montane region of India. The objectives are to: 1) assess the molecular diversity of Frankia as a function of host plant and geographical location, and 2) use sequence information to add to the current phylogenetic tree of Frankia. Scope: This work builds on the joint expertise of the PIs in using molecular methods to study Frankia. Research results will complement studies done in North America and Oceania, which have yielded differing results regarding the relative importance of host plant species or environmental factors as determinants of Frankia diversity. Practically, this research may prove useful in attempts to use actinorhizal plants in revegetation and restoration efforts, as they are important early colonizers of disturbed sites. This award is jointly supported by the Division of International Programs and the Division of Environmental Biology.