Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China.
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China.
Environ Toxicol Pharmacol. 2019 Aug;70:103208. doi: 10.1016/j.etap.2019.103208. Epub 2019 Jun 11.
Boron (B) has been widely used and contaminated the aquatic ecosystem. However, knowledge of the effects of sodium pentaborate pentahydrate (SPP) on algae remains limited. This study aimed to assess SPP toxicity using multiple endpoints, specially detecting the intracellular metal ion concentrations, malondialdehyde (MDA) content and extracellular polymeric substance (EPS) classes for the very first time during SPP exposure to Chlorella vulgaris (C. vulgaris). Our findings indicated that the inhibitory effects of SPP on C. vulgaris may be related to nutrient absorption and utilization. The changes in intracellular starch grains, MDA and the protein-like substances in EPS probably acted as a defense mechanism, helping to alleviate the toxic effects. This work may contribute to the understanding of the mechanism of SPP toxicity in algae. Further studies may focus on the effects of B on speciation of metallic ions and the interaction of B with metallic ions on aquatic organisms.
硼（B）已被广泛应用并污染了水生生态系统。然而，对于五硼酸钠五水合物（SPP）对藻类的影响知之甚少。本研究旨在使用多种终点评估 SPP 的毒性，特别是在 SPP 暴露于普通小球藻（C. vulgaris）期间首次检测细胞内金属离子浓度、丙二醛（MDA）含量和细胞外聚合物物质（EPS）类别。我们的研究结果表明，SPP 对 C. vulgaris 的抑制作用可能与营养物质的吸收和利用有关。细胞内淀粉颗粒、MDA 和 EPS 中类蛋白物质的变化可能作为一种防御机制，有助于减轻毒性作用。这项工作可能有助于理解 SPP 对藻类的毒性机制。进一步的研究可能集中在 B 对金属离子形态和 B 与金属离子在水生生物中相互作用的影响上。
