State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong 510640, P. R. China.
University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
Environ Sci Technol. 2020 Jul 7;54(13):8167-8176. doi: 10.1021/acs.est.9b07585. Epub 2020 Apr 30.
A partial life cycle test was performed with silkworms ( exposed to different levels of halogenated organic pollutants (HOPs). The aims were to investigate the fate of HOPs during metamorphosis and the adverse effects of HOP exposures on silkworm development. Contaminant exposures resulted in decreased body weights, increased development times, and reductions of fecundity in silkworms. Assimilation efficiencies of HOPs decreased with an increasing octanol-water partition coefficient (log ). From the larvae to the pupae stage, bioamplification factors (BAmFs) exhibited concentration-dependent results, in which there was a positive correlation with the log at the high concentrations but no correlation at the low concentrations. From the pupae to the moth stage, BAmFs were linearly negatively correlated with the log for males, but a parabolic correlation with the log was more suitable for females. Regarding reproductive activities, female moths selectively transferred low log HOPs to eggs by the oviposition except for highly halogenated lipophilic pollutants. However, BAmFs of male moths during mating showed no correlation with the log , although highly halogenated lipophilic pollutants had the highest BAmF values. The sex-specific bioamplification processes and special behaviors of highly halogenated lipophilic pollutants deserve further research.
采用家蚕进行了部分生活史测试（暴露于不同水平的卤代有机污染物（HOPs）中）。目的是研究 HOPs 在变态过程中的命运以及 HOP 暴露对家蚕发育的不良影响。污染物暴露导致家蚕体重减轻、发育时间延长和繁殖力降低。HOP 的同化效率随辛醇-水分配系数（log Kow）的增加而降低。从幼虫到蛹期，生物放大因子（BAmF）呈现出浓度依赖性的结果，在高浓度下与 log Kow 呈正相关，但在低浓度下无相关性。从蛹到蛾期，雄性 BAmF 与 log Kow 呈线性负相关，但雌性的 BAmF 与 log Kow 呈抛物线关系更为合适。关于生殖活动，雌蛾通过产卵选择性地将低 log Kow 的 HOPs 转移到卵中，除了高度卤化的亲脂性污染物。然而，交配期间雄蛾的 BAmF 与 log Kow 无关，尽管高度卤化的亲脂性污染物具有最高的 BAmF 值。高度卤化亲脂性污染物的性别特异性生物放大过程和特殊行为值得进一步研究。
