Jenkins K D, Sanders B M
Environ Health Perspect. 1986 Mar;65:205-10. doi: 10.1289/ehp.8665205.
We have examined the relationships between Cd ion activity [Cd2+], in seawater, Cd accumulation and subcellular distribution and growth in the polychaete Neanthes arenaceodentata. Organisms were exposed for 3 weeks to a range of [Cd2+] in a Cd-chelate buffer system. Cadmium accumulation and growth were monitored weekly for each exposure group and subcellular Cd distributions were determined at the end of the 3-week period. We found Cd associated with all of the subcellular fractions except the very low molecular weight ligands. Total Cd accumulation was greatest at day 7 and decreased over time in all but the highest [Cd2+] where it remained constant. For each point in time, however, there was a linear relationship between total Cd and [Cd2+] in seawater. Linear relationships were also observed between [Cd2+] and Cd loading in each subcellular ligand pool. Specific growth rates varied with both [Cd2+] and time in a nonlinear manner.
我们研究了海水中镉离子活性[Cd2+]、多毛纲动物沙蚕（Neanthes arenaceodentata）体内镉的积累、亚细胞分布与生长之间的关系。在镉螯合缓冲系统中，将生物体暴露于一系列[Cd2+]浓度下3周。每周监测每个暴露组的镉积累和生长情况，并在3周实验结束时测定镉的亚细胞分布。我们发现，除极低分子量配体外，镉与所有亚细胞组分均有关联。总镉积累量在第7天最高，除最高[Cd2+]浓度组外，其他组的总镉积累量均随时间下降，而在最高[Cd2+]浓度组中总镉积累量保持恒定。然而，在每个时间点，海水中总镉与[Cd2+]之间存在线性关系。在每个亚细胞配体库中，[Cd2+]与镉负载量之间也观察到线性关系。特定生长率随[Cd2+]浓度和时间呈非线性变化。
