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Land use and vegetation cover on native symbionts and interactions with cowpea AGRIAMBI
Rocha,Beatriz C. F.; Santos,Enésia O. da S.; Santos,José G. D.; Takako,Adriana K.; Castro,Fabio J..
ABSTRACT Arbuscular mycorrhizal fungi and rhizobia are important components of agroecosystems and they respond to human interference. The objective of this study was to investigate native communities of those microorganisms in soil collected under the native forest, four pastures (Brachiaria brizantha, Panicum maximum, Arachis pintoi and Stylosanthes guianensis) and a fallow soil after maize cultivation, in interaction with cowpea (Vigna unguculata). The cowpea grew in a greenhouse until flowering. They were randomly distributed depending on soil, in five replications. The lowest mycorrhizal fungi sporulation and mycorrhizal root colonization occurred under the Panicum and forest soil. In the soils under forest and Stylosanthes, the cowpea did not exhibit...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arbuscular mycorrhiza; Rhizobia; Legal Amazon; Nodulation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000200116
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Oxidative stress biomarkers and aggressive behavior in fish exposed to aquatic cadmium contamination Neotropical Ichthyology
Almeida,Jeane A.; Barreto,Rodrigo E.; Novelli,Ethel L. B.; Castro,Fabio J.; Moron,Sandro E..
The objective of this study was to investigate the possible link between cadmium exposure, hepatic markers of oxidative stress and aggressive behavior in Nile tilapia (Oreochromis niloticus). Fish were first exposed to 0.75 mg/L CdCl2 for 15 days (12 isolated fish for each group) and afterward a behavioral test was performed. Fish from the control and cadmium-exposed groups were paired for 1 h (6 pairs of fish per group) for determination of aggressiveness parameters. Immediately after the behavioral test, the animals were sacrificed and the liver was used to determine biochemical parameters. Cadmium decreased aggression in Nile tilapia. Subordinate animals exposed to cadmium showed decreased glutathione peroxidase (GSH-Px) activity compared to dominant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oreochromis niloticus; Stress response; Antioxidant enzymes; Social stress; Liver; Nile tilapia.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100013
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