Baycu Gülriz, Tolunay Doganay, Ozden Hakan, Günebakan Süreyya
Istanbul University, Faculty of Science, Department of Biology, Division of Botany, 34134 Istanbul, Turkey.
Environ Pollut. 2006 Oct;143(3):545-54. doi: 10.1016/j.envpol.2005.10.050. Epub 2006 Feb 15.
The concentrations of Cd, Pb, Zn and Ni were measured in the leaves of 7 species of deciduous trees, from the urban sites of Istanbul, in both the Spring and Autumn seasons. We detected some differences in the heavy metal concentrations of the control and urban site samples of identical species. Highest concentrations of Cd were detected in Populus, Pb in Aesculus and Robinia, Zn in Populus, and Ni in Robinia and Fraxinus. Lowest chlorophyll content and highest peroxidase (POD) activity was found in the urban site samples of Acer. We have found a positive correlation between the increase in the POD activity and the Pb concentration in Populus. Generally, the tree species investigated in this study, are considered to have different tolerance levels to heavy metal pollution. The data obtained show that the chlorophyll content and the POD activity may be used as heavy metal stress biomarkers in the urban trees.
在春季和秋季，对来自伊斯坦布尔城市地区的7种落叶树的树叶中镉、铅、锌和镍的浓度进行了测量。我们检测到相同树种的对照样本和城市地区样本在重金属浓度上存在一些差异。在杨树中检测到镉的最高浓度，在七叶树和刺槐中检测到铅的最高浓度，在杨树中检测到锌的最高浓度，在刺槐和白蜡树中检测到镍的最高浓度。在城市地区的槭树样本中发现叶绿素含量最低和过氧化物酶（POD）活性最高。我们发现杨树中POD活性的增加与铅浓度之间存在正相关。一般来说，本研究中调查的树种被认为对重金属污染具有不同的耐受水平。所获得的数据表明，叶绿素含量和POD活性可用作城市树木中重金属胁迫的生物标志物。
