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首页> 外文期刊>Mycologia >In vitro selection of ecologically adapted ectomycorrhizal fungi through production of fungal biomass and metabolites for use in reclamation of biotite mine tailings
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In vitro selection of ecologically adapted ectomycorrhizal fungi through production of fungal biomass and metabolites for use in reclamation of biotite mine tailings

机译：通过生产真菌生物量和代谢产物的体外选择生态适应的肌菌毒性真菌，以便在Biotite Line尾矿填充中使用

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摘要

Mineral weathering plays an important role in poor-nutrient environments such as mine spoils and tailings. Ectomycorrhizal (ECM) fungi are able to enhance mineral weathering through different mechanisms, thereby increasing the availability of minerals and nutrients to plants. Six ECM fungi (Cadophora finlandia, Cenococcum geophilum, Hebeloma crustuliniforme, Lactarius aurantiosordidus, Paxillus involutes, and Tricholoma scalpturatum) were tested here for their tolerance to biotite-quartz-rich mine tailings. Either solid- or liquid-medium methods were used for in vitro selection of ECM fungi for their ability to grow on mine tailings. ECM fungi were selected based on their mycelial radial growth and metabolite production (ergosterol and low-molecular-mass organic acids, LMMOAs). We found a strong correlation between fungal ergosterol content and mycelial radial growth using the solid-medium method. However, the liquid-medium method was more appropriate for ergosterol synthesis and permitted direct measurement of organic acid production. We found that LMMOAs were exuded by ECM fungi, which solubilized mine tailings for their own growth and nutrition. Finally, we concluded that the ECM fungi C. finlandia and T. scalpturatum are the species most tolerant to tailings and could potentially improve the survival rate, growth, and health of white spruce seedlings planted on biotite mine spoils and tailings.
机译：矿物风化在矿物和尾矿等贫困营养环境中起着重要作用。 Ectomycorrhizal（ECM）真菌能够通过不同的机制增强矿物风化，从而提高矿物质和营养物的可用性。六种ECM真菌（Cenocophora Finlandia，Cenococcum Geophilum，Hebeloma Crustulineniforme，乳晕Aeruriosordidus，Paxillus unsulate和Tricholoma Scalpturatum）在此测试其对Biotite-石英矿尾矿的耐受性。固体或液体介质方法用于ECM真菌的体外选择，以便它们在尾矿上生长的能力。基于其菌丝桡醛生长和代谢物生产（Ergosterol和低分子量有机酸，LMMOA）来选择ECM真菌。我们发现使用固体介质方法发现真菌Ergosterol含量和菌丝液体径向生长的强烈相关性。然而，液体介质方法更适合Ergosterol合成并允许直接测量有机酸产生。我们发现LMMOAS被ECM真菌渗出，这为自己的生长和营养增满了矿山尾矿。最后，我们得出结论，ECM Fungi C.芬兰和T.Candpruratum是最宽容的尾矿种类，并且可能会提高在Biotite矿山的白云幼苗的生存率，生长和健康状况。

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