Seção de Ecologia, Instituto de Botânica, CP 3005, 01061-970 São Paulo, SP, Brazil.
Ecotoxicol Environ Saf. 2010 May;73(4):664-70. doi: 10.1016/j.ecoenv.2009.12.016. Epub 2010 Jan 8.
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.
我们旨在确定金腰箭（C. echinata）的叶片抗氧化反应在应对城市环境中观察到的氧化环境条件时的效率，以及它们与生长和生物量参数的关系。将植物在四个地点种植了 15 个月：受机动车排放污染物影响的孔戈尼亚斯（Congonhas）和皮涅罗（Pinheiros）；受高臭氧（O3）浓度影响的伊比拉普埃拉（Ibirapuera）；以及一个装有空气过滤设备的温室。每个地点每季都会从 15 株植物中取出进行抗氧化剂、生长和生物量分析。在污染地区生长的植物表现出抗氧化剂的改变。它们比在过滤空气中生长的植物更矮，茎更粗，叶片生物量更少。抗氧化剂水平的波动受到气候和污染变量的综合影响。每个地点的抗氧化反应和空气污染物标记物浓度越高，生长和生物量的产生就越慢。
