Characteristics of Heavy-Metal Tolerance and Growth in Two Ecotypes of<i>Oxyria sinensis</i>Hemsl. Grown on Huize Lead–Zinc Mining Area in Yunnan Province, China

Oxyria sinensis adopts a tolerant strategy as a metal excluder to survive toxic metal concentrations. Biodiversity and the endophytic fungal community colonizing the O. sinensis roots were assessed from a mining area (MA) and a neighboring non-mining area (nMA) in southwestern China. All O. sinensis roots formed fully developed dark septate endophytes (DSEs) and arbuscular mycorrhizal fungi (AMF). Total DSE colonization was higher for the MA versus nMA, in contrast to the total AMF colonization in the two sites. The DSE colonization was higher than AMF colonization regardless of the site. Pure-culture data showed that the fungi closely related to Exophiala, Cadophora and Phialophora dominantly colonized the O. sinensis roots. A total of 450 operational taxonomic units (OTUs) were identified showing the presence of a distinct fungal community in MA and nMA, which was shaped by soil physiochemical properties, including soil Zn concentrations and organic matter. We found that O. sinensis accumulates and adapts efficiently to local endophytic fungi to achieve the expansion of its community, including the spontaneously reclaimed DSE. This property may be targeted to achieve its colonization with a pioneer plant for phytoremediation in the restoration of a vegetation cover in a metal-contaminated area.

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Characteristics of Heavy-Metal Tolerance and Growth in Two Ecotypes ofOxyria sinensisHemsl. Grown on Huize Lead–Zinc Mining Area in Yunnan Province, China

Cited by 3 publications

References 25 publications

Recent research progress in geochemical properties and restoration of heavy metals in contaminated soil by phytoremediation

Recent research progress in geochemical properties and restoration of heavy metals in contaminated soil by phytoremediation

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Biodiversity of Root Endophytic Fungi from Oxyria sinensis Grown in Metal-Polluted and Unpolluted Soils in Yunnan Province, Southwestern China

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