Abstract:The contents of Pb, Cd, photosynthetic pigments (chlorophyll a, chlorophyll b, chlorophyll (a+b) and carotenoid) and leaf mass per area (LMA) of Ligustrum lucidum Ait. and Ligustrum quihoui Carr. under different urban atmospheric environment were measured. The correlations between the contents of Pb, Cd in leaves and photosynthetic pigments, LMA were analyzed as well. The two plants showed significant differences in their absorption of Pb and Cd, photosynthetic pigments, and LMA under different urban environmental conditions. There were four classes of sampling sites: serious pollution areas (SP), medium level pollution areas (MLP), light pollution areas (LP) and comparatively pollution-free area (CPF). The general trend of contents of Pb, Cd, carotenoid in leaves and LMA was: SP > MLP > LP >CPF. Chl a, Chl b, Chl (a+b) also significantly differred among the sampling sites, however, they showed a reverse trend. The absorption of Pb and Cd reduced the contents of Chl a, Chl b and Chl (a+b) in leaves, and significantly negative correlations (P<0.05) were found between them. The contents of Cd in leaves increased the contents of carotenoid, but the effect of Pb was dependent on plant species. The absorption of Pb and Cd increased LMA of Ligustrum lucidum Ait.. But for Ligustrum quihoui Carr., the effects of Pb and Cd were different. LMA increased in parallel to the increasing contents of Pb in leaves. However, no obvious change in LMA of the effect of Cd was observed. Therefore, LMA, Chl a/Chl b and the contents of Chl a, Chl b, Chl (a+b) in leaves appeared to be potentially good bio-indicators for urban air environmental quality.
王会霞, 石辉, 李秧秧. 城市大气环境下绿化植物叶片比叶重和光合色素含量[J]. 中国环境科学, 2011, 31(7): 1134-1142.
WANG Hui-Xia, SHI Hui, LI Yang-Yang. Leaf mass per area and photosynthetic pigments of greening plant species under different urban atmospheric environment. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(7): 1134-1142.