Leaf antioxidant fluctuations and growth responses in saplings of Caesalpinia echinata Lam. (brazilwood) under an urban stressing environment

被引:14
作者
Bulbovas, Patricia [1 ]
de Moraes, Regina Maria [1 ]
Spasiani Rinaldi, Mirian Cilene [1 ]
Cunha, Adriana Luiza [1 ]
Carvalho Delitti, Welington Braz [2 ]
Domingos, Marisa [1 ]
机构
[1] Inst Bot, Secao Ecol, BR-01061970 Sao Paulo, Brazil
[2] Univ Sao Paulo, Dept Ecol Geral, Inst Biociencias, BR-05508900 Sao Paulo, Brazil
基金
巴西圣保罗研究基金会;
关键词
Urban environment; Tropical tree; Antioxidant responses; Growth; Biomass; AIR-POLLUTION; SUPEROXIDE-DISMUTASE; OXIDATIVE STRESS; INDUSTRIAL-COMPLEX; OZONE; PLANTS; PARAMETERS; CUBATAO; BIOINDICATORS; SENSITIVITY;
D O I
10.1016/j.ecoenv.2009.12.016
中图分类号
X [环境科学、安全科学];
学科分类号
083001 [环境科学];
摘要
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.
引用
收藏
页码:664 / 670
页数:7
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