The Early Stages in the Interaction Between Mycorrhizal Fungi and Plants

菌根真菌与植物相互作用的早期阶段

• 批准号: 9723982
• 负责人: Ann Hirsch
• 金额: $ 4.5万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-10-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9723982&HistoricalAwards=false
• 关键词: Early; Stages; Interaction; Between; Mycorrhizal

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.

9723982 Hirsch与已被广泛研究的根瘤菌-植物共生相比，菌根共生之间的关系鲜为人知。菌根使植物能够在磷贫乏的土壤上定居，无处不在，对植物生产力有很大贡献。该项目源于对VAM真菌的识别，在植物中诱导基因表达，而这些基因也是由根瘤菌诱导的。将研究紫花苜蓿对VAM真菌的早期反应。接种后，将跟踪感染过程，并将分析选定的几个植物基因的时机和表达模式。建议利用早期结瘤蛋白基因的表达作为分子标记，建立一种生物检测方法来检测可能的Myc因子，即诱导植物基因在VA菌根中表达的化学信号，并参与建立共生关系。