The Early Stages in the Interaction Between Mycorrhizal Fungi and Plants

9723982 Hirsch与已被广泛研究的根瘤菌-植物共生相比，菌根共生的关联性不太为人所知。 真菌使植物能够在磷缺乏的土壤中定居，无处不在，并对植物生产力做出重大贡献。该项目起源于VAM真菌诱导植物中基因表达的认识，其中这些基因也被根瘤菌诱导。将研究alcohol植物对VAM真菌的早期反应。接种后，将跟踪感染过程，并分析几个选定的植物基因的时间和表达模式。提出了使用早期麦谷蛋白基因的表达作为分子标记物，用于开发生物测定法以检测推定的Myc因子，即，一种化学信号，诱导VA菌根根中植物基因表达，并参与建立共生关系。

9723982 Hirsch In contrast to the Rhizobium-plant symbiosis which has been studied extensively, the association of mycorrhizal symbioses is less well known. Mycorrhizae enable plants to colonize phosphorus-poor soils, are ubiquitous, and contribute significantly to plant productivity. The project originates from the recognition of VAM-fungi inducing the expression of genes in plants where these genes are also induced by Rhizobium. Alfalfa plants will be studied for their early responses to the VAM fungi. After inoculation, the infection process will be followed and the timing and expression pattern of several selected plant genes will be analyzed. It is proposed using the expression of early nodulin genes as molecular markers for developing a bioassay to detect the putative Myc-factor, i.e., a chemical signal that induces plant gene expression in VA-mycorrhizal roots, and is involved in establishing the symbiosis.