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Co-inoculation effect of plant-growth-promoting rhizobacteria and rhizobium on EDDS assisted phytoremediation of Cu contaminated soils
Ju, Wenliang1,3,4; Liu, Lei2; Jin, Xiaolian1; Duan, Chengjiao1,4; Cui, Yongxing1,4; Wang, Jie1; Ma, Dengke1,4; Zhao, Wei1; Wang, Yunqiang3,5; Fang, Linchuan1,3
Corresponding AuthorFang, Linchuan(flinc629@hotmail.com)
2020-09-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume254Pages:13
AbstractChelants application can increase the bioavailability of metals, subsequently limiting plant growth and reducing the efficiency of phytoremediation. Plant growth-promoting rhizobacteria (PGPRs) and rhizobium have substantial potential to improve plant growth and plant tolerance to metal stress. We evaluated the effects of co-inoculation with a PGPR strain (Paenibacillus mucilaginosus) and a Cu-resistant rhizobium strain (Sinorhizobium meliloti) on the efficiency of biodegradable chelant (S,S-ethylenediaminedisuccinic acid; EDDS) assisted phytoremediation of a Cu contaminated soil using alfalfa. The highest total Cu extraction by alfalfa was observed in the EDDS-treated soil upon co-inoculation with the PGPR and rhizobium strains, which was 1.2 times higher than that without co-inoculation. Partial least squares path modeling identified plant oxidative damage and soil microbial biomass as the key variables influencing Cu uptake by alfalfa roots. Co-inoculation significantly reduced the oxidative damage to alfalfa by mitigating the accumulation of malondialdehyde and reactive oxygen species, and improving the antioxidation capacity of the plant in the presence of EDDS. EDDS application decreased microbial diversity in the rhizosphere, whereas co-inoculation increased microbial biomass carbon and nitrogen, and microbial community diversity. Increased relative abundances of Actinobacteria and Bacillus and the presence of Firmicutes taxa as potential biomarkers demonstrated that co-inoculation increased soil nutrient content, and improved plant growth. Co-inoculation with PGPR and rhizobium can be useful for altering plant-soil biochemical responses during EDDS-enhanced phytoremediation to alleviate phytotoxicity of heavy metals and improve soil biochemical activities. This study provides an effective strategy for improving phytoremediation efficiency and soil quality during chelant assisted phytoremediation of metal-contaminated soils. (C) 2020 Elsevier Ltd. All rights reserved.
KeywordChelant Rhizobacteria Alfalfa Plant tolerance Soil quality Phytoremediation
DOI10.1016/j.chemosphere.2020.126724
WOS KeywordENHANCED PHYTOEXTRACTION ; MICROBIAL COMMUNITIES ; EXTRACTION METHOD ; VIGNA-RADIATA ; METAL ; EDTA ; EFFICIENCY ; COPPER ; ACCUMULATION ; TOLERANCE
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41571314] ; National Natural Science Foundation of China[41671406] ; CAS Light ofWest China Program[XAB2016A03] ; Education Department Foundation of Zhejiang Province[Y201738652]
WOS Research AreaEnvironmental Sciences & Ecology
Funding OrganizationNational Natural Science Foundation of China ; CAS Light ofWest China Program ; Education Department Foundation of Zhejiang Province
WOS SubjectEnvironmental Sciences
WOS IDWOS:000538150400015
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/14927
Collection生态环境研究室
第四纪科学与全球变化卓越创新中心
Corresponding AuthorFang, Linchuan
Affiliation1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China
2.Univ Groningen, Univ Med Ctr Groningen, Dept Med Microbiol, Hanzepl 1, NL-9713 GZ Groningen, Netherlands
3.Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
Recommended Citation
GB/T 7714
Ju, Wenliang,Liu, Lei,Jin, Xiaolian,et al. Co-inoculation effect of plant-growth-promoting rhizobacteria and rhizobium on EDDS assisted phytoremediation of Cu contaminated soils[J]. CHEMOSPHERE,2020,254:13.
APA Ju, Wenliang.,Liu, Lei.,Jin, Xiaolian.,Duan, Chengjiao.,Cui, Yongxing.,...&Fang, Linchuan.(2020).Co-inoculation effect of plant-growth-promoting rhizobacteria and rhizobium on EDDS assisted phytoremediation of Cu contaminated soils.CHEMOSPHERE,254,13.
MLA Ju, Wenliang,et al."Co-inoculation effect of plant-growth-promoting rhizobacteria and rhizobium on EDDS assisted phytoremediation of Cu contaminated soils".CHEMOSPHERE 254(2020):13.
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