Response of ligninolytic macrofungi to the herbicide atrazine: dose-response bioassays

The effect of atrazine concentrations on mycelial growth and ligninolytic enzyme activities of eight native ligninolytic macrofungi isolated in Veracruz, México, were evaluated in a semi-solid culture medium. Inhibition of mycelial growth and growth rates were significantly affected (p=0.05) by atra...

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Published in:Revista Argentina de Microbiología 2014-10, Vol.46 (4), p.348-357
Main Authors: Cupul, Wilberth Chan, Abarca, Gabriela Heredia, Vázquez, Refugio Rodríguez, Salmones, Dulce, Hernández, Rigoberto Gaitán, Gutiérrez, Enrique Alarcón
Format: Article
Language:English
Subjects:
Atrazine - pharmacology
Biological Assay
Dose-Response Relationship, Drug
Estrés oxidativo
Fungi - drug effects
Fungi - metabolism
Herbicide tolerance
Herbicides - pharmacology
Hongos de la pudrición blanca
Lacasa
Laccase
Lignin - metabolism
Manganese peroxidase
Manganeso peroxidasa
Oxidative stress
Tolerancia a herbicidas
White-rot fungi
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Summary:The effect of atrazine concentrations on mycelial growth and ligninolytic enzyme activities of eight native ligninolytic macrofungi isolated in Veracruz, México, were evaluated in a semi-solid culture medium. Inhibition of mycelial growth and growth rates were significantly affected (p=0.05) by atrazine concentrations (468, 937, 1875, and 3750mg/l). In accordance with the median effective concentration (EC50), Pleurotus sp. strain 1 proved to be the most tolerant isolate to atrazine (EC50 = 2281.0mg/l), although its enzyme activity was not the highest. Pycnoporus sanguineus strain 2, Daedalea elegans and Trametes maxima showed high laccase activity (62.7, 31.9, 29.3U mg/protein, respectively) without atrazine (control); however, this activity significantly increased (p
ISSN:0325-7541
1851-7617
DOI:10.1016/S0325-7541(14)70094-X