Agricultural land-use favours Mucoromycotinian, but not Glomeromycotinian, arbuscular mycorrhizal fungi across ten biomes
Agricultural land-use favours Mucoromycotinian, but not Glomeromycotinian, arbuscular mycorrhizal fungi across ten biomes
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DOI：
10.1111/nph.17780
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发表时间：
2021-11-02
期刊：
影响因子：
9.4
通讯作者：
Standish, Rachel J.
中科院分区：
文献类型：
--
作者：
Albornoz, Felipe E.;Ryan, Megan H.;Standish, Rachel J.
在全球范围内，农业土地利用对促进生态系统功能（如养分循环）的土壤生物群产生负面影响，但丛枝菌根真菌（AMF）被视为农业生态系统的重要组成部分。丛枝菌根真菌包括肾小球菌根内生真菌（glomeromycotiinian AMF, G-AMF）和产生丛枝的细根内生真菌，最近被重新归类为毛霉门内内生真菌目。mucoromycotiinian AMF （M-AMF）的正确分类和新的分子工具的可用性可以指导研究更好地了解其多样性和生态学。为了研究大陆尺度上农业土地利用对G-AMF和M-AMF的影响，我们从澳大利亚10个生物群落的成对农场和原生地点取样DNA。在所有生物群系中，原生和农场地点均存在肾小球型AMF。假定的M-AMF在农业样地更受青睐，在原生样地很少或不存在，而在热带生物群落中几乎完全不存在。温度、降雨量和土壤pH值是群落丰富度和群落组成的重要驱动因子，植物丰富度是重要的中介因子。这两个真菌群占据不同但重叠的生态位，M-AMF在温带农业景观中蓬勃发展。我们的发现促使人们探索M-AMF的起源和传播，并继续努力解决这一新重新分类的AMF群体的系统发育问题。
Globally, agricultural land-use negatively affects soil biota that contribute to ecosystem functions such as nutrient cycling, yet arbuscular mycorrhizal fungi (AMF) are promoted as essential components of agroecosystems. Arbuscular mycorrhizal fungi include Glomeromycotinian AMF (G-AMF) and the arbuscule-producing fine root endophytes, recently re-classified into the Endogonales order within Mucoromycotina. The correct classification of Mucoromycotinian AMF (M-AMF) and the availability of new molecular tools can guide research to better the understanding of their diversity and ecology. To investigate the impact on G-AMF and M-AMF of agricultural land-use at a continental scale, we sampled DNA from paired farm and native sites across 10 Australian biomes. Glomeromycotinian AMF were present in both native and farm sites in all biomes. Putative M-AMF were favoured by farm sites, rare or absent in native sites, and almost entirely absent in tropical biomes. Temperature, rainfall, and soil pH were strong drivers of richness and community composition of both groups, and plant richness was an important mediator. Both fungal groups occupy different, but overlapping, ecological niches, with M-AMF thriving in temperate agricultural landscapes. Our findings invite exploration of the origin and spread of M-AMF and continued efforts to resolve the phylogeny of this newly reclassified group of AMF.