Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China.
Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, Lianyungang 222005, China.
Mar Pollut Bull. 2024 Nov;208:116948. doi: 10.1016/j.marpolbul.2024.116948. Epub 2024 Sep 11.
Copper (Cu) is vital for macroalgae's functions, but high concentrations can be toxic. Rising CO levels affect algal growth and Cu bioavailability. In this study, the results reveal that at 5 °C, low Cu increased Ulva linza growth, while high Cu and elevated CO decreased growth. At 10 °C, low Cu and elevated CO enhanced growth, but high Cu did not have a significant impact. At 15 °C, high Cu reduced growth, but elevated CO offset this effect. Furthermore, under elevated CO conditions, the chloroplast structure of the algae appeared to be denser, accompanied by a large amount of starch granules, compared to low CO conditions. These results emphasize that lower temperatures, in conjunction with elevated CO concentration, could intensify the toxic effects of high Cu concentrations on thalli. However, at higher temperatures, elevated CO concentration appeared to be capable of mitigating the detrimental effects of heavy metals on algae.
铜（Cu）对大型藻类的功能至关重要，但高浓度可能有毒。不断上升的 CO 水平会影响藻类的生长和 Cu 的生物利用度。本研究结果表明，在 5°C 时，低 Cu 增加了石莼的生长，而高 Cu 和高 CO 则降低了生长。在 10°C 时，低 Cu 和高 CO 促进了生长，但高 Cu 没有显著影响。在 15°C 时，高 Cu 降低了生长，但高 CO 抵消了这种影响。此外，在高 CO 条件下，与低 CO 条件相比，藻类的叶绿体结构显得更加密集，同时伴随着大量的淀粉颗粒。这些结果表明，较低的温度与高 CO 浓度相结合，可能会加剧高 Cu 浓度对藻体的毒性影响。然而，在较高温度下，高 CO 浓度似乎能够减轻重金属对藻类的不利影响。
