Bioaccumulation and Biovolatilisation of Pentavalent Arsenic by Penicillin janthinellum, Fusarium oxysporum and Trichoderma asperellum Under Laboratory Conditions
Bioaccumulation and Biovolatilisation of Pentavalent Arsenic by Penicillin janthinellum, Fusarium oxysporum and Trichoderma asperellum Under Laboratory Conditions
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DOI：
10.1007/s00284-010-9605-6
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发表时间：
2010-02
影响因子：
2.6
通讯作者：
S. Su;X. Zeng;L. Bai;Xiliang Jiang;Lianfang Li
中科院分区：
文献类型：
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作者：
S. Su;X. Zeng;L. Bai;Xiliang Jiang;Lianfang Li
一些真菌能够控制和修复砷（As）污染的土壤，沉积物或水。在这里，我们调查潜在的积累和挥发的三种真菌菌株。结果表明，在添加2,500 μ gAs（V）的培养体系中，10天后，青霉菌积累的As量最高，为39.54 μg，相当于50 mg/l的As，而镰刀菌则在15天后挥发的As量最高，为304.06 μg。处理体系（滤纸+ As +真菌）中As含量显著高于对照（滤纸+ As;滤纸+真菌;滤纸）。尖孢霉对胞外砷的吸收和胞内砷的积累能力上级，分别占总积累量的82.2%和63.4%。然而，P. janthinellum呈现出细胞内和细胞外均匀分布的As。扫描电镜（SEM）分析表明，50 mg/l As（V）处理5 d后，3株真菌的菌丝生长几乎没有受到影响，而对照组的菌丝生长受到抑制。结果表明，红拟青霉、尖孢镰刀菌和T. Asperellum有望解决As污染的环境。
Some fungi are able to control and remediate arsenic (As)-contaminated soil, sediment, or water. Here, we investigate potential accumulation and volatilisation of As by three fungi strains. Results indicated that the highest level of As was accumulated byPenicillinjanthinellumwith 39.54 μg after 10 days in the culture system amended with 2,500 μg As(V), which represents 50 mg/l As.Fusariumoxysporumshowed the highest amount of volatilised As with 304.06 μg after 15 days. The As content in the treated system (filter paper + As + fungi) was significantly higher than that in the control (filter paper + As; filter paper + fungi; filter paper).Trichoderma asperellumandF. oxysporumshowed superior abilities for the absorption of extracellular As and accumulation of intracellular As, which accounted for 82.2 and 63.4% of the total accumulated As, respectively. However,P. janthinellumpresented an equal distribution of intracellular and extracellular As. Scanning electron microscope (SEM) analysis suggested that little impact on mycelium growth of the three fungal strains was seen after exposure to 50 mg/l As(V) for 5 days, while the growth of fungi in the control was inhibited. The present results demonstrate thatP.janthinellum,F.oxysporum, andT. asperellumwould be expected to tackle As-contaminated environments.