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首页> 外文期刊>Applied Soil Ecology >Arbuscular mycorrhizal hyphae in grassland select for a diverse and abundant hyphospheric bacterial community involved in sulfonate desulfurization
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Arbuscular mycorrhizal hyphae in grassland select for a diverse and abundant hyphospheric bacterial community involved in sulfonate desulfurization

机译：草原丛枝菌根菌丝选择参与硫酸盐脱硫的多样丰富的疏水菌群落

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摘要

Hyphae of symbiotic arbuscular mycorrhizal (AM) fungi extend into the soil, affecting the hyphosphere and interact with beneficial soil bacteria. This study aimed to elucidate differences in hyphosphere, hyphoplane and bulk soil bacterial communities and their role in mobilization of sulfonate-sulfur. Abundances of cultivable hyphosphere and hyphoplane bacteria were significantly increased over bulk soil. Cultivation independent fingerprinting revealed significantly different community structures of both hyphosphere and hyphoplane bacteria, fungi and AM fungi over bulk soil. However, cultivation dependent and independent analysis did not identify a difference between bacterial hyphoplane and hyphosphere (hyphospheric) communities. Isolated bacteria capable of aromatic sulfonate desulfurization were almost exclusively of hyphospheric origin. Members of the hyphospheric Gammaproteobacteria and Actinobacteria were found to possess marker gene asfA for aromatic sulfonate desulfurization and hrcR for attachment to fungal hyphae with a type III secretion system, that were not detected in bulk soil. These findings suggest that AM hyphae host a distinct population of sulfonate desulfurizing bacteria putatively capable of hyphal attachment with potential to increase plant sulfur supply. (C) 2014 Elsevier B.V. All rights reserved.
机译：共生的丛枝菌根真菌（AM）真菌的菌丝延伸到土壤中，影响菌丝层并与有益的土壤细菌相互作用。这项研究旨在阐明在大气层，疏水层和土壤土壤细菌群落中的差异及其在磺化硫磺迁移中的作用。在大块土壤上，可培养的疏水层和疏水层细菌的丰度显着增加。独立于栽培的指纹图谱显示，散装土壤上的疏水层和疏水层细菌，真菌和AM真菌的群落结构显着不同。但是，依赖栽培的分析和独立的分析并未发现细菌菌丝和菌丝（菌丝）群落之间的差异。能够进行芳族磺酸盐脱硫的分离细菌几乎完全是来自大气层的。发现在球状γ-变形杆菌和放线菌中的成员具有标记基因asfA（用于芳族磺酸盐脱硫）和hrcR（用于与具有III型分泌系统的真菌菌丝连接），在散装土壤中未检测到。这些发现表明AM菌丝具有独特的磺酸盐脱硫细菌种群，这些细菌被认为能够与菌丝结合并具有增加植物硫供应的潜力。 （C）2014 Elsevier B.V.保留所有权利。

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