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铊在真菌亚细胞中的分布特征

Keywords: ,微生物,真菌,亚细胞,分布,富集

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Abstract:

将前期从铊污染区筛选得到的9株高耐受性真菌菌株用于微生物对铊的富集和亚细胞分布实验,采用酶解和差速离心法分离各亚细胞组分,并检测其中铊的质量分数.结果表明,生物富集量随着铊处理浓度上升而降低,其影响趋势与对生物量的影响趋势基本一致,最高可达7189mg/kg,最大富集系数为7.19.在亚细胞水平上,铊的富集优先顺序为:细胞质—细胞壁—细胞器.亚细胞水平的区隔化作用是真菌对铊的主要耐受机制,细胞质是赋存铊的主要场所(53.83%~79.45%).

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