Inoculation with chlamydospores of Trichoderma asperellum SM-12F1 accelerated arsenic volatilization and inlfuenced arsenic availability in soils

WANG Xiu-rong; SU Shi-ming; ZENG Xi-bai; BAI Ling-yu; LI Lian-fang; DUAN Ran; WANG Ya-nan; WU Cui-xia

首页> 中文期刊> 《农业科学学报（英文版）》 >Inoculation with chlamydospores of Trichoderma asperellum SM-12F1 accelerated arsenic volatilization and inlfuenced arsenic availability in soils

Inoculation with chlamydospores of Trichoderma asperellum SM-12F1 accelerated arsenic volatilization and inlfuenced arsenic availability in soils

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Fungi capable of arsenic (As) accumulation and volatilization are hoped to tackle As-contaminated environment in the future. However, little data is available regarding their performances in ifeld soils. In this study, the chlamydospores of Trichoderma asperel um SM-12F1 capable of As resistance, accumulation, and volatilization were inoculated into As-contaminated Chen-zhou (CZ) and Shimen (SM) soils, and subsequently As volatilization and availability were assessed. The results indicated that T. asperel um SM-12F1 could reproduce wel in As-contaminated soils. After cultivated for 42 days, the colony forming units (cfu) of T. asperel um SM-12F1 in CZ and SM soils reached 1010–1011 cfu g–1 fresh soil when inoculated at a rate of 5.0%. Inoculation with chlamydospores of T. asperel um SM-12F1 could signiifcantly accelerate As volatilization from soils. The contents of volatilized As from CZ and SM soils after being inoculated with chlamydospores at a rate of 5.0%for 42 days were 2.0 and 0.6μg kg–1, respectively, which were about 27.5 and 2.5 times higher than their corresponding controls of no inoculation (CZ, 0.1μg kg–1;SM, 0.3μg kg–1). Furthermore, the available As content in SM soils was decreased by 23.7%, and that in CZ soils increased by 3.3%compared with their corresponding controls. Further studies showed that soil pH values signiifcantly decreased as a function of cultivation time or the inoculation level of chlamydospores. The pH values in CZ and SM soils after being inoculated with 5.0%of chlamydospores for 42 days were 6.04 and 6.02, respectively, which were lowered by 0.34 and 1.21 compared with their corresponding controls (CZ, 6.38;SM, 7.23). The changes in soil pH and As-binding fractions after inoculation might be responsible for the changes in As availability. These observations could shed light on the future remediation of As-contaminated soils using fungi.

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《农业科学学报（英文版）》 |2015年第2期|389-397|共9页
作者
WANG Xiu-rong; SU Shi-ming; ZENG Xi-bai; BAI Ling-yu; LI Lian-fang; DUAN Ran; WANG Ya-nan; WU Cui-xia;
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Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P.R.China;

Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P.R.China;

Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P.R.China;

Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P.R.China;

Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P.R.China;

Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P.R.China;

Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P.R.China;

Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing 100081, P.R.China;

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Inoculation with chlamydospores of Trichoderma asperellum SM-12F1 accelerated arsenic volatilization and inlfuenced arsenic availability in soils

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