Developmental Studies of the Alfalfa-Rhizobium meliloti symbiosis

赫希博士研究的长期目标是分析 结核发展所涉及的步骤，并揭示 两种截然不同的生物微生物 和植物，在建立固氮根瘤。 结节是一个特别有趣的发育系统 因为它只在氮胁迫的条件下形成;植物 生长在充足的氮中，才能形成根瘤。因此，博士。 Hirsch的研究重点是结节形成早期表达的基因 因为它们预示着一个新的发展途径的开始， 其具有深远的生态学和农学重要性。的 该建议的具体目标是：1）确定是否 无菌结节在其发育过程中 野生型R.苜蓿草诱导结瘤，和2）确定 细胞分裂因子的产生是否独立于 根毛变形因子该研究项目不仅将 扩展我们对植物微生物相互作用的理解， 为今后开发新氮奠定基础 固定农作物

The long term goal of Dr. Hirsch's research is to analyze the steps involved in nodule development, and also to unravel the genetic contributions of two very different organisms, microbe and plant, in the establishment of a nitrogen fixing root nodule. The nodule is a particularly interesting developmental system because it forms only under conditions of nitrogen stress; plants grown with sufficient nitrogen do to develop nodules. Hence, Dr. Hirsch's focuses on the genes expressed early in nodule formation because they herald the onset of a new developmental pathway, one which has far reaching ecological and agronomic importance. The specific objectives of this proposal are: 1) to determine whether bacteria free nodules differ significantly in their development from wild type R. meliloti induced nodules, and 2) to determine whether a cell division factor is produces independently of the root hair deformation factor. This research project will not only extend our understanding of plant microbe interactions, but also lay the foundation for future attempts to develop novel nitrogen fixing crop plants.