Diversity and Activities of Resident Soil Microorganisms: Effects on Soilborne Plant pathogenic Fungi

[00:16 . 06]常驻土壤微生物的多样性和活动：对土传植物病原真菌的影响石油是迄今为止所有陆地生态系统中生物多样性最大的。然而，这种多样性的量化很差，其与生态系统功能的关系也没有得到很好的理解。在这个项目中，研究者建议研究土壤微生物的多样性和活动与土壤生物系统稳定性之间的关系。土壤生物系统的稳定性将通过评估两种植物病原真菌的活性来衡量，即终极真菌（Pythium ultimum）和solanrhizoctonia solani。指导本研究的两个主要问题是：1)土壤微生物的高活性和多样性是否会降低根病原体的活性？2)土壤微生物多样性和活性的增加是否增强了土壤生物系统对引入病原体的抵抗力？该研究将有助于进一步认识土壤多样性与土壤生物系统稳定性之间的关系。了解土壤微生物对植物病原体的影响也将帮助我们设计更好的做法，减少这些病原体在可持续农业系统中造成的作物损害。

00-01686HuDiversity and activities of resident soil microorganisms: Effects on soilborne plant pathogenic fungiSoil contains by far the largest biological diversity of all terrestrial ecosystems. However, this diversity is poorly quantified, and its relationship to ecosystem functioning is not well understood. In this project, the investigator proposes to examine the relationships between the diversity and activities of soil microorganisms and stability of soil biological systems. Stability of soil biosystems will be measured by assessing activities of two plant pathogenic fungi, Pythium ultimum and Rhizoctonia solani. Two major questions guide this research: 1) Do high activities and diversity of soil microorganisms reduce activities of root pathogens? 2) Does the increase of diversity and activities of soil microorganisms enhance the resistance of soil biosystems to introduced pathogens? This study will advance our understanding of the relationship between soil diversity and the stability of soil biosystems. Knowledge of the effects of soil microorganisms on plant pathogens will also help us design better practices that reduce crop damage caused by these pathogens in sustainable agricultural systems.