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Title

Effect of oil refinery sludges on the growth and antioxidant system of alfalfa plants

AuthorsMartí Ruiz, María del Carmen ; Camejo, Daymi ; Fernández, Nieves ; Rellán-Álvarez, Rubén ; Marques, Silvia; Sevilla Valenzuela, Francisca G. ; Jiménez, Ana
KeywordsAlfalfa
Antioxidants
Homoglutathione
Oil refinery sludge
Oxidative stress
Issue DateNov-2009
PublisherElsevier
CitationJournal of Hazardous Materials 171 (1–3): 879–885 (2009)
AbstractThe refining process in the petrochemical industry generates oil refinery sludges, a potentially contaminating waste product, with a high content of hydrocarbons and heavy metals. Faster degradation of hydrocarbons has been reported in vegetated soils than in non-vegetated soils, but the impact of these contaminants on the plants physiology and on their antioxidant system is not well known. In this study, the effect of the addition of petroleum sludge to soil on the physiological parameters, nutrient contents, and oxidative and antioxidant status in alfalfa was investigated. An inhibition of alfalfa growth and an induction of oxidative stress, as indicated by an increase in protein oxidation, were found. Also, the superoxide dismutase isoenzymes, peroxidase, and those enzymes involved in the ascorbate–glutathione cycle showed significant activity increases, parallel to an enhancement of total homoglutathione, allowing plants being tolerant to this situation. This information is necessary to establish successful and sustainable plant-based remediation strategies.
Description7 Pags.- 6 Tabl.- 1 Fig.
Publisher version (URL)http://dx.doi.org/10.1016/j.jhazmat.2009.06.083
URIhttp://hdl.handle.net/10261/143947
DOI10.1016/j.jhazmat.2009.06.083
ISSN0304-3894
E-ISSN1873-3336
Appears in Collections:(EEAD) Artículos
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