Response of forest soil bacterial communities to mercury chloride application
Response of forest soil bacterial communities to mercury chloride application
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DOI：
10.1016/j.soilbio.2013.06.001
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发表时间：
2013-10-01
影响因子：
9.7
通讯作者：
Rieder, Stephan R.
中科院分区：
文献类型：
--
作者：
Frey, Beat;Rieder, Stephan R.
本研究评估了温带森林土壤中细菌群落对不同汞(Hg)改良剂的响应。有7种土壤的汞含量增加，分别为0.032、0.32、0.32、3.2和32亩g汞(II)g(-1)干土。30天后，我们用细菌生物传感器(Merlux)、基础呼吸、细菌群落结构和确定对汞有反应的指示物OTU来检测生物可利用汞。当土壤中生物有效汞含量超过0.004 mU/g时，土壤的基础呼吸受到较大影响。生物可利用性高的汞也引起细菌T-RFLP图谱的显著变化。α蛋白细菌(Rhodspirillales)和β蛋白细菌(Burkholdriales)的成员被发现是耐汞的。在这里，我们提出了0.004微克汞(-1)土壤中可溶性汞的临界浓度。(C)2013爱思唯尔有限公司。保留所有权利。
This study evaluates the response of the bacterial communities to different mercury (Hg) amendments in temperate forest soils. Seven soils were spiked with increasing amounts of Hg [(0, 0.032, 0.32, 3.2 and 32 mu g Hg(II) g(-1) dry soil]. After 30 days, we examined the bioavailable Hg using bacterial biosenors (merlux), basal respiration, bacterial community structures and identified indicator OTUs which were responsive to Hg. In soils treated with at least 3.2 mu g Hg g(-1) dry soil, resulting in bioavailable Hg higher than 0.004 mu g Hg g(-1) dry soil, the basal respiration was strongly affected. High bioavailable Hg also caused significant changes in the bacterial T-RFLP profiles. Members of the Alphaproteobacteria (Rhodospirillales) and Betaproteobacteria (Burkholderiales) were found to be Hg-tolerant. Here, we propose a critical limit concentration for soluble Hg of 0.004 mu g Hg g(-1) soil. (C) 2013 Elsevier Ltd. All rights reserved.