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Arbuscular mycorrhizal fungi stimulate organic phosphate mobilization associated with changing bacterial community structure under field conditions

文献类型： 外文期刊

作者： Zhang, Lin 1 ; Shi, Ning 1 ; Fan, Jiequn 3 ; Wang, Fei 1 ; George, Timothy S. 4 ; Feng, Gu 1 ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

2.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Jinan 250100, Peoples R China

3.Shanghai Acad Agr Sci, Shanghai 201106, Peoples R China

4.James Hutton Inst, Dundee DD2 5DA, Scotland

期刊名称：ENVIRONMENTAL MICROBIOLOGY （ 影响因子：5.491； 五年影响因子：6.438 ）

ISSN： 1462-2912

年卷期： 2018 年 20 卷 7 期

页码：

收录情况： SCI

摘要： The extraradical hyphae of arbuscular mycorrhizal fungi (AMF) harbour and interact with a microbial community performing multiple functions. However, how the AMF-microbiome interaction influences the phosphorus (P) acquisition efficiency of the mycorrhizal pathway is unclear. Here we investigated whether AMF and their hyphal microbiome play a role in promoting organic phosphorus (P) mineralizing under field conditions. We developed an AMF hyphae in-growth core system for the field using PVC tubes sealed with membrane with different size of pores (30 or 0.45 mu m) to allow or deny AMF hyphae access to a patch of organic P in root-free soil. AMF and their hyphae associated microbiome played a role in enhancing soil organic P mineralization in situ in the field, which was shown to be a function of the change in bacteria community on the hyphae surface. The bacterial communities attached to the AMF hyphae surface were significantly different from those in the bulk soil. Importantly, AMF hyphae recruited bacteria that produced alkaline phosphatase and provided a function that was absent from the hyphae. These results demonstrate the importance of understanding trophic interactions to be able to gain insight into the functional controls of nutrient cycles in the rhizosphere.

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