Department of Environmental Biology and Fisheries Science, National Taiwan Ocean University, Keelung 20224, Taiwan.
Department of Dentistry, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung 81357, Taiwan.
Int J Environ Res Public Health. 2020 Feb 18;17(4):1294. doi: 10.3390/ijerph17041294.
This study investigated the changes in bioaccumulation, bioabsorption, photosynthesis rate, respiration rate, and photosynthetic pigments (phycoerythrin, phycocyanin, and allophycocyanin) of following cadmium exposure within 24 h. The bioabsorption was significantly higher than the bioaccumulation at all cadmium levels ( < 0.05). The ratios of bioabsorption/bioaccumulation in light and dark bottles were 2.17 and 1.74, respectively, when was exposed to 5 Cd mg/L. The chlorophyll a (Chl-a) concentration, oxygen evolution rate (photosynthetic efficiency), and oxygen consumption rate (respiratory efficiency) decreased with increasing bioaccumulation and ambient cadmium levels. The levels of bioaccumulation and bioabsorption in light environments were significantly higher than those in dark environments ( < 0.05). In addition, the ratios of phycoerythrin (PE)/Chl-a, phycocyanin (PC)/Chl-a, and allophycocyanin (APC)/Chl-a were also higher in light bottles compared to dark bottles at all ambient cadmium levels. These results indicated that the photosynthesis of seaweed will increase bioaccumulation and bioabsorption in a cadmium environment.
本研究在 24 小时内调查了镉暴露后生物积累、生物吸收、光合作用率、呼吸作用率和光合色素（藻红蛋白、藻蓝蛋白和别藻蓝蛋白）的变化。在所有镉水平下，生物吸收均显著高于生物积累（<0.05）。当暴露于 5Cd mg/L 时，光瓶和暗瓶中的生物吸收/生物积累比分别为 2.17 和 1.74。叶绿素 a（Chl-a）浓度、氧气释放率（光合效率）和氧气消耗率（呼吸效率）随着生物积累和环境镉水平的增加而降低。光环境中的生物积累和生物吸收水平明显高于暗环境（<0.05）。此外，在所有环境镉水平下，光瓶中的藻红蛋白（PE）/Chl-a、藻蓝蛋白（PC）/Chl-a 和别藻蓝蛋白（APC）/Chl-a 的比值也高于暗瓶。这些结果表明，在镉环境中，海藻的光合作用会增加生物积累和生物吸收。
