Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/32251
metadata.artigo.dc.title: Potential of different AM fungi (native from As-contaminated and uncontaminated soils) for supporting Leucaena leucocephala growth in As-contaminated soil
metadata.artigo.dc.creator: Schneider, Jerusa
Bundschuh, Jochen
Rangel, Wesley de Melo
Guilherme, Luiz Roberto Guimarães
metadata.artigo.dc.subject: Mycorrhizas
Arsenic contamination
Phytoremediation
Antioxidant enzymes
Micorrizas
Contaminação por arsênico
Fitorremediação
Enzimas antioxidantes
metadata.artigo.dc.publisher: Elsevier
metadata.artigo.dc.date.issued: May-2017
metadata.artigo.dc.identifier.citation: SCHNEIDER, J. et al. Potential of different AM fungi (native from As-contaminated and uncontaminated soils) for supporting Leucaena leucocephala growth in As-contaminated soil. Environmental Pollution, Barking, v. 224, p. 125-135, May 2017.
metadata.artigo.dc.description.abstract: Arbuscular mycorrhizal (AM) fungi inoculation is considered a potential biotechnological tool for an eco-friendly remediation of hazardous contaminants. However, the mechanisms explaining how AM fungi attenuate the phytotoxicity of metal(oid)s, in particular arsenic (As), are still not fully understood. The influence of As on plant growth and the antioxidant system was studied in Leucaena leucocephala plants inoculated with different isolates of AM fungi and exposed to increasing concentrations of As (0, 35, and 75 mg dm−3) in a Typic Quartzipsamment soil. The study was conducted under greenhouse conditions using isolates of AM fungi selected from uncontaminated soils (Acaulospora morrowiae, Rhizophagus clarus, Gigaspora albida; and a mixed inoculum derived from combining these isolates, named AMF Mix) as well as a mix of three isolates from an As-contaminated soil (A. morrowiae, R. clarus, and Paraglomus occultum). After 21 weeks, the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR) were determined in the shoots in addition to measuring plant height and mineral contents. In general, AM fungi have shown multiple beneficial effects on L. leucocephala growth. Although the activity of most of the stress-related enzymes increased in plants associated with AM fungi, the percentage increase caused by adding As to the soil was even greater for non-mycorrhizal plants when compared to AM-fungi inoculated ones, which highlights the phytoprotective effect provided by the AM symbiosis. The highest P/As ratio observed in AM-fungi plants, compared to non-mycorrhizal ones, can be considered a good indicator that the AM fungi alter the pattern of As(V) uptake from As-contaminated soil. Our results underline the role of AM fungi in increasing the tolerance of L. leucocephala to As stress and emphasize the potential of the symbiosis L. leucocephala-R. clarus for As-phytostabilization at moderately As-contaminated soils.
metadata.artigo.dc.identifier.uri: https://www.sciencedirect.com/science/article/pii/S0269749116316001?via%3Dihub#!
http://repositorio.ufla.br/jspui/handle/1/32251
metadata.artigo.dc.language: en_US
Appears in Collections:DCS - Artigos publicados em periódicos

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