Zhang Wenze, He Lianghua, Pan Jiangqi, Zhou Yuhong, Ge Ruxiang, Li Sufang, Shi Yunyun, Chen Xinhua, Chu Yaoyao
College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Plants (Basel). 2023 Mar 2;12(5):1140. doi: 10.3390/plants12051140.
Coastal macroalgae may be subjected to global and local environmental stressors, such as ocean acidification and heavy-metal pollution. We investigated the growth, photosynthetic characteristics, and biochemical compositions of juvenile sporophytes of cultivated at two pCO levels (400 and 1000 ppmv) and four copper concentrations (natural seawater, control; 0.2 μM, low level; 0.5 μM, medium level; and 1 μM, high level) to better understand how macroalgae respond to ongoing environmental changes. The results showed that the responses of juvenile to copper concentrations depended on the pCO level. Under the 400 ppmv condition, medium and high copper concentrations significantly decreased the relative growth rate (RGR) and non-photochemical quenching (NPQ) but increased the relative electron transfer rate (rETR) and chlorophyll (Chl ), chlorophyll (Chl ), carotenoid (Car), and soluble carbohydrate contents. At 1000 ppmv, however, none of the parameters had significant differences between the different copper concentrations. Our data suggest that excess copper may inhibit the growth of juvenile sporophytes of , but this negative effect could be alleviated by CO-induced ocean acidification.
沿海大型海藻可能会受到全球和局部环境压力因素的影响，例如海洋酸化和重金属污染。我们研究了在两种pCO₂水平（400和1000 ppmv）以及四种铜浓度（天然海水，对照；0.2 μM，低水平；0.5 μM，中等水平；和1 μM，高水平）下培养的幼体孢子体的生长、光合特性和生化组成，以更好地了解大型海藻如何应对当前的环境变化。结果表明，幼体对铜浓度的响应取决于pCO₂水平。在400 ppmv条件下，中等和高铜浓度显著降低了相对生长速率（RGR）和非光化学猝灭（NPQ），但提高了相对电子传递速率（rETR）以及叶绿素a（Chl a）、叶绿素c（Chl c）、类胡萝卜素（Car）和可溶性碳水化合物含量。然而，在1000 ppmv时，不同铜浓度之间的参数均无显著差异。我们的数据表明，过量的铜可能会抑制的幼体孢子体的生长，但这种负面影响可能会因CO₂诱导的海洋酸化而得到缓解。
