农业环境科学学报2011，Vol.30Issue(5)：836-842,7.
镉对油菜幼苗生长及微量元素含量的影响
Influences of Cadmium on the Growth and Micro-elements Contents of Oilseed Rape Seedlings
摘要
Abstract
In order to elucidate the mechanisms of cadmium(Cd ) stress on plant growth, a hydroponic experiment was conducted to investigate the influences of Cd on the growth, physiological properties and micro-elements contents of oilseed rape (Brassica napus L.cv.Zhongshuang 9)seedlings.Present study included 0, 0.1, 0.2, 0.5 and 1.0 mg·L-1 Cd treatments (CK, C1, C2, C3 and C4, respectively)with four replicates.Results showed that, compared with CK, both roots and shoots dry weights of oilseed rape seedlings were significantly decreased with Cd concentrations increasing in hydroponic solution.The photosynthetic pigments contents, compared with CK, were also significantly decreased with Cd concentration increasing.Except the Cu concentrations in roots, the concentrations of micro-elements in both roots and shoots of plants were significantly decreased by Cd addition in hydroponic solution, compared with CK.While, the antioxidant enzymes( SOD,POD and CAT)activities were increased at the lower Cd concentrations and then decreased at the higher Cd concentrations in hydroponic solution.These results indicated that, exogenous Cd stress significantly decreased the growth of oilseed rape seedlings through inducing the photosynthetic pigments degradation, nutrient elements metabolism disturbance and oxidative stress on plants.Meanwhile, the Cd concentrations and accumulations in the shoots of oilseed rape seedlings were significantly lower than those of plant roots, which indicated that Zhongshuang 9 might be a lower capacity cultivar for Cd uptake.关键词
镉/油菜/营养液培养/抗氧化酶/微量元素Key words
cadmium/ Brassica napus/ hydroponics/ antipxidative enzyme/ micro-element分类
资源环境引用本文复制引用
张树杰,李玲,张春雷,李光明..镉对油菜幼苗生长及微量元素含量的影响[J].农业环境科学学报,2011,30(5):836-842,7.基金项目
科技部科技支撑计划(2009BADA8B01,2006BAD21B03) （2009BADA8B01,2006BAD21B03）
