Biosorption and bioaccumulation of thallium by thallium-tolerant fungal isolates
Biosorption and bioaccumulation of thallium by thallium-tolerant fungal isolates
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DOI：
10.1007/s11356-015-4859-y
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发表时间：
2015-06
影响因子：
5.8
通讯作者：
Jialong Sun;X. Zou;T. Xiao;Yanlong Jia;Zengping Ning;Min Sun;Yizhang Liu;Tao Jiang
中科院分区：
文献类型：
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作者：
Jialong Sun;X. Zou;T. Xiao;Yanlong Jia;Zengping Ning;Min Sun;Yizhang Liu;Tao Jiang
目前对铊污染土壤中微生物对铊的吸附和富集能力知之甚少。研究了从铊污染土壤中分离的耐铊真菌对铊的吸附和富集特性。初步数据表明，生物量和生物吸附的Tl含量之间呈正相关。耐铊菌株能够生物积累铊，干重高达7189 mg kg-1。T1的亚细胞分布呈明显的区室化：细胞质>细胞壁>细胞器.大部分Tl（高达79%）被发现在细胞质中，表明细胞内区室化似乎负责解毒。这些发现进一步表明真菌分离物用于清除Tl污染的水和土壤中的Tl的适用性。
Little is known about the biosorption and bioaccumulation capacity of thallium (Tl) by microorganisms that occur in Tl-polluted soil. The present study focused on characterizing the biosorption and bioaccumulation of Tl by Tl-tolerant fungi isolated from Tl-polluted soils. Preliminary data showed a positive correlation between the biomass and the biosorbed Tl content. The Tl-tolerant strains were capable of bioaccumulating Tl, up to 7189 mg kg−1dry weight. The subcellular distribution of Tl showed obvious compartmentalization: cytoplasm ≫ cell wall > organelle. The majority of Tl (up to 79 %) was found in the cytoplasm, suggesting that intracellular compartmentalization appeared to be responsible for detoxification. These findings further suggest the applicability of the fungal isolates for cleanup of Tl in Tl-polluted water and soil.