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题名:
Inoculating chlamydospores of Trichoderma asperellum SM-12F1 changes arsenic availability and enzyme activity in soils and improves water spinach growth
作者: Su, SM; Zeng, XB; Bai, LY; Williams, PN; Wang, YN; Zhang, LL; Wu, CX
刊名: CHEMOSPHERE
出版日期: 2017
卷号: 175, 页码:497-504
关键词: Fungi ; Arsenic ; Water spinach ; Soil enzyme ; Speciation ; XANES
DOI: 10.1016/j.chemosphere.2017.02.048
文章类型: 期刊论文
英文摘要: Arsenic (As)-contaminated agricultural soils threaten crop yields and pose a human health risk. Augmentation of exogenous microorganisms exhibiting plant-growth promoting and As speciation changing shows potential to improve crop growth and change soil As availability. Trichoderma asperellum SM-12F1 exhibiting both traits was developed into chlamydospores to improve its persistence in contaminated soils. After inoculation, As availability and enzyme activity in two types of soils and the growth as well as As uptake of water spinach (Ipomoea aquatic Forsk.) were investigated. The results indicated that inoculation significantly improved water spinach growth in both soils. Inoculating chlamydospores at 5% significantly increased As concentration (139%), bioconcentration factor (150%), and translocation factor (150%) in water spinach grown in Chenzhou (CZ) soils, while no significant change for these in Shimen (SM) soils. Inoculating chlamydospores at 5% caused a significant increase (16%) of available As content in CZ soils, while a significant decrease (13%) in SM soils. Inoculation significantly caused As methylation in both soils, while significant As reduction merely observed in CZ soils. The differential changes in available As contents in both soils were attributed to the soil pH, As fractionations and speciation characteristics. Furthermore, Inoculating chlamydospores at 5% significantly improved the activities of beta-glucosidase (155%), chitinase (211%), and phosphatase (108%) in SM soils, while significant decreases in beta-glucosidase (81%), phosphatase (54%), aminopeptidase (60%), and catalase (67%) in CZ soils. Bioaugmentation and As availability change were responsible for this result. These observations will be helpful for the application of fungal chlamydospores in the future bioremediation. (C) 2017 Published by Elsevier Ltd.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000397691200059
ISSN号: 0045-6535
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27353
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Su, SM,Zeng, XB,Bai, LY,et al. Inoculating chlamydospores of Trichoderma asperellum SM-12F1 changes arsenic availability and enzyme activity in soils and improves water spinach growth[J]. CHEMOSPHERE,2017-01-01,175:497-504.
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