Cain J R, Paschal D C, Hayden C M
Arch Environ Contam Toxicol. 1980;9(1):9-16. doi: 10.1007/BF01055495.
A laboratory investigation was conducted to study the extent and efficiency of cadmium bioaccumulation in Scenedesmus obliquus by subjecting this alga to varied sublethal Cd concentrations. The influence of cell population age on Cd bioaccumulation was also studied. Under the experimental conditions employed, growth was not significantly affected by Cd concentrations ranging from 0.01 ppm to 1.00 ppm. At concentrations above 1.00 ppm, however, growth was inhibited markedly. Increases in external Cd concentration caused an increase in total bioaccumulation over the entire range of concentrations, which did not significantly affect growth. Efficiency of Cd bioaccumulation was also concentration dependent, but maximum accumulation efficiency occurred in a medium with a Cd concentration lower than that medium in which maximum total bioaccumulation occurred. Age of the cell population influenced the extent of Cd bioaccumulation. Rapidly growing, young cultures accumulated less Cd than older cultures approaching stationary growth phase.
通过使斜生栅藻暴露于不同的亚致死镉浓度下，进行了一项实验室研究，以探讨镉在该藻类中的生物积累程度和效率。同时还研究了细胞群体年龄对镉生物积累的影响。在所采用的实验条件下，浓度范围为0.01 ppm至1.00 ppm的镉对生长没有显著影响。然而，当浓度高于1.00 ppm时，生长受到明显抑制。在整个浓度范围内，外部镉浓度的增加导致总生物积累量增加，这对生长没有显著影响。镉生物积累效率也取决于浓度，但最大积累效率出现在镉浓度低于最大总生物积累量所在培养基的培养基中。细胞群体的年龄影响镉生物积累的程度。快速生长的年轻培养物积累的镉比接近稳定生长阶段的较老培养物少。
