title: The presence of Microlobius foetidus cause changes in the antioxidant defense of Urochloa decumbens?
abstract: Urochloa decumbens (Stapf) R. D. Webster (Poaceae) is an exotic species with has spread rapidly through the Cerrado area of Pantanal, Mato Grosso do Sul, Brazil. It has covered the soil aggressively turning it into cultivated pastures. Thus, it has become a challenge to protect native areas due its capacity of exclusion of native species. It has been observed that Microlobius foetidus (Jacq.) M.Sousa & G.Andrade species (Fabaceae) shows a dominant pattern over the development of U. decumbens. This work shows that M. foetidus interfere on the natural growth of U. decumbens within 10 m ratio. Between 15 and 20 m, it was observed an increase of Importance Value index (IVI) and Relative cover (RC) values. It was also observed a variation on the antioxidant defense system of U. decumbens within 10m ratio from M. foetidus. The enzymes superoxide dismutase, catalase and peroxidase present higher levels of activity then those found for glutathione reductase. This data indicates that M. foetidus may have an effect on U. decumbens, increase the activity of antioxidant enzymes. This effect probably happens as means to neutralize the toxic effects of the oxygen generated due to the presence of allelochemicals, which increases oxidative stress.
authors.affiliation: Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: C B
authors.initials: CB
authors.lastname: Silva
authors.affiliation: Departamento de Biologia, Universidade Católica Dom Bosco, Campo Grande, MS, BR.
authors.forename: J N
authors.initials: JN
authors.lastname: Rondon
authors.affiliation: Departamento de Biologia, Universidade Católica Dom Bosco, Campo Grande, MS, BR.
authors.forename: P F
authors.initials: PF
authors.lastname: Souza
authors.affiliation: Departamento de Engenharia Florestal, Instituto Nacional de Pesquisas da Amazônia, Manaus, AM, BR.
authors.forename: A M R
authors.initials: AM
authors.lastname: Oliveira
authors.affiliation: Departamento de Botânica, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: G O
authors.initials: GO
authors.lastname: Santos
authors.affiliation: Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: J D
authors.initials: JD
authors.lastname: Kulik
authors.affiliation: Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: C P
authors.initials: CP
authors.lastname: Lima
authors.affiliation: Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: V A
authors.initials: VA
authors.lastname: Kerber
authors.affiliation: Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: J F G
authors.initials: JF
authors.lastname: Dias
authors.affiliation: Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: S M W
authors.initials: SM
authors.lastname: Zanin
authors.affiliation: Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: O G
authors.initials: OG
authors.lastname: Miguel
authors.affiliation: Departamento de Farmácia, Universidade Federal do Paraná, Curitiba, PR, BR.
authors.forename: M D
authors.initials: MD
authors.lastname: Miguel
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D035201:Brachiaria / Q000378:metabolism*; D007887:Fabaceae / Q000502:physiology*; D058865:Introduced Species; D018384:Oxidative Stress
chemical_list: D000975:Antioxidants