The microplastisphere: Biodegradable microplastics addition alters soil microbial community structure and function

doi:10.1016/j.soilbio.2021.108211

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	The microplastisphere: Biodegradable microplastics addition alters soil microbial community structure and function
	Zhou,Jie ; Gui,Heng ; Banfield,Callum C.; Wen,Yuan ; Zang,Huadong ; Dippold,Michaela A.; Charlton,Adam ; Jones,Davey L.
	2021
发表期刊	SOIL BIOLOGY & BIOCHEMISTRY
ISSN	0038-0717
卷号	156 页码:108211
摘要	Plastics accumulating in the environment, especially microplastics (defined as particles <5 mm), can lead to a range of problems and potential loss of ecosystem services. Polyhydroxyalkanoates (PHAs) are biodegradable plastics used in mulch films, and in packaging material to minimize plastic waste and to reduce soil pollution. Little is known, however, about the effect of microbioplastics on soil-plant interactions, especially soil microbial community structure and functioning in agroecosystems. For the first time, we combined zymography (to localize enzyme activity hotspots) with substrate-induced growth respiration to investigate the effect of PHAs addition on soil microbial community structure, growth, and exoenzyme kinetics in the microplastisphere (i.e. interface between soil and microplastic particles) compared to the rhizosphere and bulk soil. We used a common PHAs biopolymer, poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and showed that PHBV was readily used by the microbial community as a source of carbon (C) resulting in an increased specific microbial growth rate and a more active microbial biomass in the microplastisphere in comparison to the bulk soil. Higher ss-glucosidase and leucine aminopeptidase activities (0.6-5.0 times higher Vmax) and lower enzyme affinities (1.5-2.0 times higher Km) were also detected in the microplastisphere relative to the rhizosphere. Furthermore, the PHBV addition changed the soil bacterial community at different taxonomical levels and increased the alpha diversity, as well as the relative abundance of Acidobacteria and Verrucomicrobia phyla, compared to the untreated soils. Overall, PHBV addition created soil hotspots where C and nutrient turnover is greatly enhanced, mainly driven by the accelerated microbial biomass and activity. In conclusion, microbioplastics have the potential to alter soil ecological functioning and biogeochemical cycling (e.g., SOM decomposition).
关键词	Enzyme activity Microbial growth Microplastic pollution Soil organic matter C turnover Sequencing PLASTIC MULCH CARBON DEGRADATION POLYHYDROXYALKANOATES MECHANISMS INCREASES RESPONSES BACTERIAL POLYMERS PROTEIN
DOI	10.1016/j.soilbio.2021.108211
WOS记录号	WOS:000640189100034
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/73096
专题	中国科学院昆明植物研究所
作者单位	1.China Agr Univ, Coll Agron & Biotechnol, Beijing, Peoples R China 2.Zhou, Jie; Banfield, Callum C.; Dippold, Michaela A.] Univ Goettingen, Dept Crop Sci, Biogeochem Agroecosyst, Gottingen, Germany 3.Chinese Acad Sci, Kunming Inst Bot, CAS Key Lab Plant Divers & Biogeog East Asia, Kunming, Yunnan, Peoples R China 4.Chinese Acad Sci, Ctr Mt Futures CMF, Kunming Inst Bot, Kunming, Yunnan, Peoples R China 5.Bangor Univ, BioComposites Ctr, Bangor LL57 2UW, Gwynedd, Wales 6.Jones, Davey L.] Bangor Univ, Sch Nat Sci, Bangor LL57 2UW, Gwynedd, Wales 7.Jones, Davey L.] Univ Western Australia, UWA Sch Agr & Environm, Soils West, Perth, WA 6009, Australia
推荐引用方式 GB/T 7714	Zhou,Jie,Gui,Heng,Banfield,Callum C.,et al. The microplastisphere: Biodegradable microplastics addition alters soil microbial community structure and function[J]. SOIL BIOLOGY & BIOCHEMISTRY,2021,156:108211.
APA	Zhou,Jie.,Gui,Heng.,Banfield,Callum C..,Wen,Yuan.,Zang,Huadong.,...&Jones,Davey L..(2021).The microplastisphere: Biodegradable microplastics addition alters soil microbial community structure and function.SOIL BIOLOGY & BIOCHEMISTRY,156,108211.
MLA	Zhou,Jie,et al."The microplastisphere: Biodegradable microplastics addition alters soil microbial community structure and function".SOIL BIOLOGY & BIOCHEMISTRY 156(2021):108211.

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