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Evidence for fungi and gold redox interaction under Earth surface conditions

机译:地球表面条件下真菌和金氧化还原相互作用的证据

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摘要

Microbial contribution to gold biogeochemical cycling has been proposed. However, studies have focused primarily on the influence of prokaryotes on gold reduction and precipitation through a detoxification-oriented mechanism. Here we show, fungi, a major driver of mineral bioweathering, can initiate gold oxidation under Earth surface conditions, which is of significance for dissolved gold species formation and distribution. Presence of the gold-oxidizing fungus TA_pink1, an isolate of Fusarium oxysporum, suggests fungi have the potential to substantially impact gold biogeochemical cycling. Our data further reveal that indigenous fungal diversity positively correlates with in situ gold concentrations. Hypocreales, the order of the gold-oxidizing fungus, show the highest centrality in the fungal microbiome of the auriferous environment. Therefore, we argue that the redox interaction between fungi and gold is critical and should be considered in gold biogeochemical cycling.
机译:已提出微生物对金生物地球化学循环的贡献。然而,研究主要集中在原核生物通过以排毒为导向的机制对金的还原和沉淀的影响。在这里我们表明,真菌是矿物生物风化的主要驱动力,可以在地球表面条件下引发金的氧化,这对于溶解金的形成和分布具有重要意义。氧化镰刀菌的金氧化菌TA_pink1的存在表明,真菌具有潜在影响金生物地球化学循环的潜力。我们的数据进一步表明,原生真菌的多样性与原位金浓度呈正相关。降霉菌是金氧化真菌的顺序,在金耳环境的真菌微生物组中显示出最高的集中度。因此,我们认为真菌和金之间的氧化还原相互作用至关重要,应该在金的生物地球化学循环中加以考虑。

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