Potential of different AM fungi (native from As-contaminated and uncontaminated soils) for supporting Leucaena leucocephala growth in As-contaminated soil
Article
Article Title | Potential of different AM fungi (native from As-contaminated and uncontaminated soils) for supporting Leucaena leucocephala growth in As-contaminated soil |
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ERA Journal ID | 5823 |
Article Category | Article |
Authors | Schneider, Jerusa (Author), Bundschuh, Jochen (Author), de Melo Rangel, Wesley (Author) and Guilherme, Luiz Roberto Guimaraes (Author) |
Journal Title | Environmental Pollution |
Journal Citation | 224, pp. 125-135 |
Number of Pages | 11 |
Year | 2017 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0269-7491 |
1873-6424 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.envpol.2017.01.071 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0269749116316001 |
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. |
Keywords | Mycorrhizas, Arsenic contamination, Phytoremediation, P/As plant content ratio, Antioxidant enzymes |
ANZSRC Field of Research 2020 | 410405. Environmental rehabilitation and restoration |
410404. Environmental management | |
410402. Environmental assessment and monitoring | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | State University of Campinas, Brazil |
Deputy Vice-Chancellor's Office (Research and Innovation) | |
Federal University of Lavras, Brazil | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q762v/potential-of-different-am-fungi-native-from-as-contaminated-and-uncontaminated-soils-for-supporting-leucaena-leucocephala-growth-in-as-contaminated-soil
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