PDF(Pubmed)
Abstract：
Mining activities in the kaolin mining area have led to the disruption of the ecological health of the mining area and nearby soils, but the effects on the fungal communities in the rhizosphere soils of the plants are not clear. Three common plants (Conyza bonariensis, Artemisia annua, and Dodonaea viscosa) in kaolin mining areas were selected and analyzed their rhizosphere soil fungal communities using ITS sequencing. The alpha diversity indices (Chao1, Shannon, Simpson, observed-species, pielou-e) of the fungal communities decreased to different extents in different plants compared to the non-kauri mining area. The β-diversity (PCoA, NMDS) analysis showed that the rhizosphere soil fungal communities of the three plants in the kaolin mine area were significantly differentiated from those of the control plants grown in the non-kaolin mine area, and the extent of this differentiation varied among the plants. The analysis of fungal community composition showed that the dominant fungi in the rhizosphere fungi of C. bonariensis and A. annua changed, with an increase in the proportion of Mycosphaerella (genus) by about 20% in C. bonariensis and A. annua. An increase in the proportion of Didymella (genus) by 40% in D. viscosa was observed. At the same time, three plant rhizosphere soils were affected by kaolin mining activities with the appearance of new fungal genera Ochrocladosporium and Plenodomus. Predictive functional potential analysis of the samples revealed that a significant decrease in the potential of functions such as biosynthesis and glycolysis occurred in the rhizosphere fungal communities of kaolin-mined plants compared to non-kaolin-mined areas. The results show that heavy metals and plant species are the key factors influencing these changes, which suggests that selecting plants that can bring more abundant fungi can adapt to heavy metal contamination to restore soil ecology in the kaolin mining area.
摘要：
高岭土矿区的采矿活动导致矿区和附近土壤的生态健康受到破坏,但是对植物根际土壤中真菌群落的影响尚不清楚。三种常见植物（Conyzabonariensis，黄花蒿,选择了高岭土矿区的Dodonaeavisigsa），并使用ITS测序分析了其根际土壤真菌群落。阿尔法多样性指数(Chao1，Shannon，辛普森,观察物种，与非贝乌里矿区相比，不同植物中真菌群落的pielou-e）下降程度不同。β-多样性(PCoA，NMDS)分析表明,高岭土矿区三种植物根际土壤真菌群落与非高岭土矿区对照植物根际土壤真菌群落差异显著,这种分化的程度在植物之间有所不同。对真菌群落组成的分析结果表明,黄花青霉根际真菌中的优势真菌发生了变化,在黄花C.bonariensis和A.annua中，分枝杆菌（属）的比例增加了约20％。观察到D.viscosa中Didymella（属）的比例增加了40％。同时,三种植物根际土壤受到高岭土开采活动的影响，并出现了新的真菌Ochrocladosporium和Plenodomus。样品的预测功能潜力分析表明，与非高岭土开采地区相比，高岭土开采植物的根际真菌群落中生物合成和糖酵解等功能的潜力显着下降。结果表明，重金属和植物种类是影响这些变化的关键因素，这表明，选择能够带来更多真菌的植物可以适应重金属污染，以恢复高岭土矿区的土壤生态。
