Mycorrhizal Mediation of Grassland Biotic Interactions and Plant Community Structure

草原生物相互作用和植物群落结构的菌根介导

• 批准号: 9317976
• 负责人: David Hartnett
• 金额: $ 33.44万
• 依托单位: Kansas State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-05-15 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9317976&HistoricalAwards=false
• 关键词: Mycorrhizal; Mediation; Grassland; Biotic; Interactions

9317976 Hartnett This research continues investigations into how mycorrhizal symbioses mediate exchange of nutrients among plants and thereby influence the structure and dynamics of plant communities. A combination of field studies and greenhouse experiments examines the mechanisms controlling patterns of nutrient transfer between plants via mycorrhizal hyphal bridges and the influence of mycorrhyzae on competition among plants and on plant response to grazing. The influence of grazing pressure on the activity of mycorrhizal fungi is also examined. %%% This research is significant in providing new insights into the role played by associations between mycorrhizal fungi and plants in the competition for resources among plant species and interactions between plants and herbivores. The function and structure of communities may be more strongly influenced by mycorrhizal mutualisms than has been previously thought. Information from this research could have important applications to understanding ecosystem function, mineral nutrition of trees and agricultural plants, and the effect of weeds on cultivated plants. ***

本研究继续探讨菌根共生如何调节植物间的营养交换，从而影响植物群落的结构和动态。田间研究和温室试验相结合，探讨了通过菌根菌丝桥控制植物间养分转移模式的机制，以及菌根菌对植物间竞争和植物对放牧反应的影响。研究了放牧压力对菌根真菌活性的影响。本研究对菌根真菌与植物之间的关联在植物物种间资源竞争和植物与食草动物之间的相互作用中所起的作用提供了新的见解。群落的功能和结构可能比以前认为的更强烈地受到菌根共生的影响。该研究结果对了解生态系统功能、树木和农业植物的矿质营养以及杂草对栽培植物的影响具有重要的应用价值。* * *