A trait-based approach to unlock the secrets of fungal soil aggregation mechanisms

基于性状的方法来解开真菌土壤聚集机制的秘密

• 批准号: 263671284
• 负责人: Professor Dr. Matthias C. Rillig, Ph.D.
• 金额: --
• 依托单位: Arbeitsgruppe Ökologie der Pflanzen
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/263671284?language=en
• 关键词: trait; based; approach; unlock; secrets

Soil aggregation is a major ecosystem process. However, the precise, direct mechanisms leading to soil aggregates and in particular the impact of soil organism traits remain unclear. In the framework of this proposal and the resulting studies, we will unravel the mechanisms of soil aggregation (separately for soil aggregate formation and stabilization) and the impact of functional diversity of saprobic fungi. We will test the three hypotheses that (i) fungal traits contain a phylogenetic signal, (ii) fungal traits determine the ability of fungi to form and stabilize aggregates and (iii) increasing trait distance in pairs of fungi will lead to increased complementarity and thus greater soil aggregation responses. We will test our hypotheses on a set of 30 fungal isolates (saprobic fungi) that were optimized for phylogenetic representation and t-RFLP separation, all isolated from one grassland ecosystem. As a first step, we will gather data for 12 selected traits related to soil aggregate formation and stabilization. These data will be used to evaluate if closely related species have more similar trait combinations than more phylogenetically distant species. In the next step, the 30 isolates will be analyzed for their ability to form and stabilize soil aggregates; these aggregation ability data will be correlated with the corresponding traits to evaluate their importance for the two aggregation processes. In the final step, we will test in pair-wise assembled species combination the impact of trait distance on soil aggregation. The data obtained will shed new light on the mechanisms behind soil aggregation and the role of saprobic fungi in this multidimensional interaction framework; thus we will make an important contribution to soil aggregation research. On the other hand, this project will highlight the usefulness of trait-based approaches with fungi in general.

土壤团聚是一个重要的生态系统过程。然而，导致土壤团聚体的确切，直接的机制，特别是土壤生物性状的影响仍然不清楚。在这一建议的框架和由此产生的研究，我们将解开土壤团聚（分别为土壤团聚体的形成和稳定）的机制和腐殖真菌的功能多样性的影响。 我们将测试三个假设，即（i）真菌性状包含系统发育信号，（ii）真菌性状决定真菌形成和稳定聚集体的能力，（iii）增加成对真菌的性状距离将导致互补性增加，从而增加土壤聚集反应。 我们将测试我们的假设，一组30个真菌菌株（腐真菌）进行了优化的系统发育代表性和t-RFLP分离，所有隔离从一个草原生态系统。作为第一步，我们将收集与土壤团聚体形成和稳定相关的12个选定性状的数据。这些数据将用于评估是否密切相关的物种比遗传学上更远的物种具有更多相似的性状组合。下一步，将分析30个菌株形成和稳定土壤团聚体的能力;这些团聚能力数据将与相应的性状相关，以评估它们对两个团聚过程的重要性。在最后一步中，我们将在成对组装的物种组合中测试性状距离对土壤聚集性的影响。 所获得的数据将揭示土壤团聚背后的机制和腐真菌在这个多维相互作用框架中的作用，因此，我们将作出重要贡献，土壤团聚研究。另一方面，该项目将突出一般真菌的基于特征的方法的有用性。

项目成果

Tradeoffs in hyphal traits determine mycelium architecture in saprobic fungi

• DOI: 10.1038/s41598-019-50565-7
• 发表时间: 2019-10
• 期刊: Scientific Reports
• 影响因子: 4.6
• 作者: A. Lehmann;Weishuang Zheng;Katharina Soutschek;J. Roy;Andrey M. Yurkov;M. Rillig

Intransitive competition is common across five major taxonomic groups and is driven by productivity, competitive rank and functional traits

• DOI: 10.1111/1365-2745.12959
• 发表时间: 2018-05
• 期刊: Journal of Ecology
• 影响因子: 5.5
• 作者: S. Soliveres;A. Lehmann;S. Boch;F. Altermatt;F. Carrara;T. Crowther;M. Delgado‐Baquerizo;Anne Kempel;D. Maynard;M. Rillig;B. Singh;P. Trivedi;E. Allan