Artículos de revistas
Leaf antioxidant fluctuations and growth responses in saplings of Caesalpinia echinata Lam. (brazilwood) under an urban stressing environment
Fecha
2010Registro en:
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, v.73, n.4, p.664-670, 2010
0147-6513
10.1016/j.ecoenv.2009.12.016
Autor
BULBOVAS, Patricia
MORAES, Regina Maria de
RINALDI, Mirian Cilene Spasiani
CUNHA, Adriana Luiza
DELITTI, Welington Braz Carvalho
DOMINGOS, Marisa
Institución
Resumen
We intended to establish how efficient the leaf antioxidant responses of C. echinata are against oxidative environmental conditions observed in an urban environment and their relations to growth and biomass parameters. Plants were grown for 15 months in four sites: Congonhas and Pinheiros, affected by pollutants from vehicular emissions; Ibirapuera, affected by high O(3) concentrations; and a greenhouse with filtered air. Fifteen plants were quarterly removed from each site for analysis of antioxidants, growth and biomass. Plants growing in polluted sites showed alterations in their antioxidants. They were shorter, had thicker stems and produced less leaf biomass than plants maintained under filtered air. The fluctuations in the levels of antioxidants were significantly influenced by combined effects of climatic and pollution variables. The higher were the antioxidant responses and the concentrations of pollutant markers of air contamination in each site the slower were the growth and biomass production. (C) 2009 Elsevier Inc. All rights reserved.