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首页> 外文期刊>Plant and Soil >Copper sorption and accumulation by the extraradical mycelium of different Glomus spp. (arbuscular mycorrhizal fungi) isolated from the same polluted soil
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Copper sorption and accumulation by the extraradical mycelium of different Glomus spp. (arbuscular mycorrhizal fungi) isolated from the same polluted soil

机译：不同Glomus spp的根外菌丝对铜的吸附和积累。从同一污染土壤中分离出来的（丛枝菌根真菌）

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摘要

The form and localisation of Cu accumulation in the extraradical mycelium (ERM) of three arbuscular mycorrhizal fungi (AMF), isolated from the same polluted soil contaminated with the Cu and Arsenate, was studied. There were differences in the capacity of the ERM of the three AMF to sorb and accumulate Cu. Glomus caledonium BEG133 had a significantly lower Cu-sorption capacity than Glomus mosseae BEG132 and Glomus claroideum BEG134 isolated from the polluted soil as well as an isolate of G. mosseae BEG25 from a non-polluted soil. This was directly related to the cation exchange capacity (CEC) of the ERM of these fungi. Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM) linked to an energy dispersive X-ray spectrometer (EDAX) gave more detailed information, showing that the ERM of AMF from the polluted soil was able to accumulate Cu in the mucilaginous outer hyphal wall zone, cell wall and inside the hyphal cytoplasm. The EDAX spectra showed that the accumulated Cu was mainly associated with Fe in the mucilaginous outer hyphal wall zone and in the cell wall. Cu was associated with traces of arsenate inside the cytoplasm of the ERM of Glomus mosseae BEG132 but this was not visible inside the ERM of Glomus caledonium BEG133 or Glomus claroideum BEG134. This work suggests that the ERM of AMF is able to sorb and accumulate Cu, but different tolerance mechanisms exist between the three AMF isolated from the same polluted soil providing further evidence for functional diversity within populations of AMF in soils. [References: 49]
机译：研究了从相同污染的铜和砷酸盐污染土壤中分离出来的三种丛枝菌根真菌（AMF）的根外菌丝体（ERM）中Cu积累的形式和位置。三种AMF的ERM吸收和积累Cu的能力存在差异。与从受污染的土壤以及从无污染的土壤分离出的G. musseae BEG25分离出的Glomus mosseae BEG132和Glomus claroideum BEG134相比，Glomus caledonium BEG133的铜吸附能力明显降低。这与这些真菌的ERM的阳离子交换容量（CEC）直接相关。与能量色散X射线光谱仪（EDAX）相连的透射电子显微镜（TEM）和扫描电子显微镜（SEM）提供了更详细的信息，表明受污染土壤的AMF的ERM能够在粘液性外菌丝中积聚Cu。壁区，细胞壁和菌丝细胞质内。 EDAX光谱表明，在粘液外菌丝壁区和细胞壁中，积累的Cu主要与Fe有关。铜与Gromus mosseae BEG132的ERM细胞质内的砷酸盐痕迹有关，但在Glomus caledonium BEG133或Glomus claroideum BEG134的ERM内不可见。这项工作表明，AMF的ERM能够吸收和积累Cu，但是从同一污染土壤中分离出的三种AMF之间存在不同的耐受机制，这为土壤中AMF种群内的功能多样性提供了进一步的证据。 [参考：49]

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