Revisiting the root economics space—its applications, extensions and nuances advance our understanding of fine-root functioning

IF 3.9 2区 农林科学 Q1 AGRONOMY
Elsa Matthus, Marie Zwetsloot, Benjamin M. Delory, Justus Hennecke, Karl Andraczek, Tilo Henning, Liesje Mommer, Alexandra Weigelt, Joana Bergmann
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Abstract

Background and aims

Fine roots and their traits determine resource uptake from the soil, thus being fundamental for plant and ecosystem functioning. It has been five years since the concept of the root economics space (RES) has been developed to describe multidimensional fine-root trait coordination. The RES proposed a novel fungal collaboration gradient in addition to the established fast-slow gradient of resource conservation. This review addresses both researchers already using the RES and those newly introduced to the concept. Our objective is to evaluate the empirical support for the concept, explore trait extensions and implications for ecosystem functioning, and examine future prospects of the RES.

Scope/Results

We conducted a literature review of 134 papers working with the RES to quantitatively assess support for the concept and its two trait gradients. The RES, particularly the collaboration gradient, is widely supported across organizational levels, habitats and study designs. Multidimensionality in the trait space appears to be a universal pattern. We further map traits that have been added to the RES concept and discuss the special role of legumes and ecto- versus arbuscular mycorrhizal fungi.

Conclusions

We conclude that the RES is a powerful concept to understand fine-root functional variation. Moving forward, we emphasize the need to integrate additional traits to develop a more comprehensive framework for understanding plant and ecosystem functioning.

重新审视根经济学空间——它的应用、扩展和细微差别促进了我们对细根功能的理解
背景和目的细根及其性状决定了植物对土壤资源的吸收,是植物和生态系统功能的基础。根经济学空间(roots economics space, RES)是描述多维细根特征协调的概念,已有5年的历史。在已有的资源保护快-慢梯度之外,RES提出了一种新的真菌协同梯度。本综述针对已经使用RES的研究人员和新引入该概念的研究人员。我们的目标是评估对这一概念的实证支持,探索性状扩展及其对生态系统功能的影响,并探讨未来的前景。范围/结果我们对134篇与RES有关的论文进行了文献综述,定量评估了对这一概念及其两个性状梯度的支持。RES,特别是协作梯度,在组织层次、栖息地和研究设计中得到广泛支持。特征空间的多维性似乎是一种普遍的模式。我们进一步绘制了已添加到RES概念中的性状,并讨论了豆科植物和外生菌根真菌对丛枝菌根真菌的特殊作用。结论RES是理解细根功能变异的有力概念。展望未来,我们强调需要整合其他性状,以建立一个更全面的框架来理解植物和生态系统的功能。
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来源期刊
Plant and Soil
Plant and Soil 农林科学-农艺学
CiteScore
8.20
自引率
8.20%
发文量
543
审稿时长
2.5 months
期刊介绍: Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.
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