Synergistic effect of organo-mineral amendments and plant growth-promoting rhizobacteria (PGPR) on the establishment of vegetation cover and amelioration of mine tailings

被引：62

作者：

Benidire, L. ^{[1
]}

Madline, A. ^{[1
]}

Pereira, S. I. A. ^{[2
]}

Castro, P. M. L. ^{[2
]}

Boularbah, A. ^{[1
,3
]}

机构：

[1] Univ Cadi Ayyad, Fac Sci & Tech Marrakech, Lab Bioressources & Securit Sanit Aliments, BP 549, M-40000 Marrakech, Morocco

[2] Univ Catolica Portuguesa, CBQF Ctr Biotecnol & Quim Fina, Lab Associado, Escola Super Biotecnol, Rua Diogo Botelho 1327, P-4169005 Porto, Portugal

[3] Univ Mohammed VI Polytech UM6P, AgrobioSci Program, Benguerir, Morocco

来源：

CHEMOSPHERE | 2021年 / 262卷

关键词：

Bioinoculation; Metals; Amendments; Phytoremediation; Soil enzymes; Oxidative stress; HEAVY-METAL CONTAMINATION; SOUTH MOROCCO; MINING SITES; COMMUNITY STRUCTURE; SOIL AMENDMENTS; CD UPTAKE; PHYTOSTABILIZATION; COMPOST; L; REMEDIATION;

D O I：

10.1016/j.chemosphere.2020.127803

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Mine tailings pose a huge hazard for environmental and human health, and the establishment of vegetation cover is crucial to reduce pollutant dispersion for the surroundings. However, their hostile physicochemical conditions hamper plant growth, compromising phytoremediation strategies. This study aims to investigate the role of organo-mineral amendments and plant growth-promoting rhizobacteria (PGPR) on the improvement of mine tailings properties and Lolium perenne L. (ryegrass) growth. Plants were grown in mine tailings mixed with an agricultural soil (1:1), 10% compost, and supplied with two different inorganic amendments - rock phosphate (6%) or lime (3%), and inoculated with the rhizobacterial strains Advenella kashmirensis BKM20 (B1) and Mesorhizobium tamadayense BKM04 (B2). The application of organo-mineral amendments ameliorated tailings characteristics, which fostered plant growth and further enhanced soil fertility and microbial activity. These findings were consistent with the increase of total organic carbon levels, with the higher numbers of heterotrophic and phosphate solubilizing bacteria, and higher dehydrogenase and urease activities, found in these substrates after plant establishment. Plant growth was further boosted by PGPR inoculation, most noticeable by co-inoculation of both strains. Moreover, inoculated plants showed increased activities for several antioxidant enzymes (catalase, peroxidase, polyphenoloxidase, and glutathione reductase) which indicate a reinforced anti-oxidant system. The application of agricultural soil, compost and lime associated with the inoculation of a mixture of PGPR proved to enhance the establishment of vegetation cover, thus promoting the stabilization of Kettara mine tailings. Nonetheless, further studies are needed in order to confirm its effectiveness under field conditions. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：14

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[1] Effect of nickel-resistant rhizosphere bacteria on the uptake of nickel by the hyperaccumulator Noccaea caerulescens under controlled conditions [J].