Colonization of Penicillium oxalicum SL2 in Pb-contaminated paddy soil and its immobilization effect on soil Pb

作     者：Yu Gao Xiaohan Jiang Hanxin Wu Jianhao Tong Xinyue Ren Jiayu Ren Qianhua Wu Jien Ye Chunhui Li Jiyan Shi Yu Gao;Xiaohan Jiang;Hanxin Wu;Jianhao Tong;Xinyue Ren;Jiayu Ren;Qianhua Wu;Jien Ye;Chunhui Li;Jiyan Shi

作者机构：Department of Environmental EngineeringCollege of Environmental and Resource ScienceZhejiang UniversityHangzhou 310058China MOE Key Laboratory of Environmental Remediation and Ecological HealthCollege of Environmental and Resource ScienceZhejiang UniversityHangzhou 310058China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2022年第34卷第10期

页      面：53-62页

核心收录：

学科分类：12[管理学] 1204[管理学-公共管理] 082803[工学-农业生物环境与能源工程] 07[理学] 08[工学] 0828[工学-农业工程] 09[农学] 0903[农学-农业资源与环境] 120405[管理学-土地资源管理] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China (No. 42077119) the Innovative Research Group Project of the National Natural Science Foundation of China (No. 41721001) 

主　　题：Penicillium oxalicum SL2 Colonization Lead Availability Green fluorescent protein 

摘      要：Penicillium oxalicum SL2(SL2) is a previously screened Pb-tolerant fungus that can promote crops growth. The relationship between SL2 colonization and Pb immobilization was studied to provide a theoretical basis for microbial remediation of Pb-contaminated paddy *** this study, green fluorescent protein(GFP) labeled SL2 was inoculated into different Pbcontaminated paddy soils(S1-S6). The Pb extracted from the soil by HNO, EDTA and CaClwere used to characterize the available Pb. The results showed that the colonization of SL2was divided into lag phase(0-7 days), growth phase(7-30 days), and mortality phase(30-90days). SL2 colonized well in sandy soils rich in clay and total phosphorus with initial p H of 4.5-7.0. In addition, SL2 increased soil p H and decreased soil Eh, which was beneficial to immobilize Pb. In different soils, the highest percentages of CaCl-Pb, EDTA-Pb, and HNO3-Pb immobilized by SL2 were 34.34%-40.53%, 17.05%-20.11%, and 7.39%-15.62%, *** correlation analysis showed that the percentages of CaCl-Pb and EDTA-Pb immobilized by SL2 were significantly positively correlated with the number of SL2 during the growth phase. SL2 mainly immobilized Pb in the growth phase and a higher peak number of SL2 was beneficial to the immobilization of Pb.