Hawler Medical University-College of Health Sciences, Medical Microbiology Department, Erbil, KRG, Iraq.
Department of Medical Biochemical Analysis, Cihan University-Erbil, Erbil, Kurdistan Region, Iraq.
Braz J Microbiol. 2023 Sep;54(3):2001-2009. doi: 10.1007/s42770-023-01030-1. Epub 2023 Jun 14.
Seasonal variation of water, antioxidant activities as algal pigments, total antioxidant activities, DPPH, total phenolic compound using three solvents, methanol, acetone, and diethyl ether, of two algal species, N. commune and N. muscarum, were assessed. They also determined the physio-chemical and bacteriological water characteristics at the Gali Ali Bag. A significant variation were observed with an obvious correlation in water quality parameters in different seasons, generally raised in summer and reduced in winter. The two algal species show a higher accumulation of photosynthetic and accessory pigments in spring and summer and a significant decrease in winter. Antioxidant capacity in both algal species was analyzed by a three-way ANOVA and Kruskal-Wallis test. However, the contents were significant for all solvents. Moreover, N. muscarum shows the highest capacity in winter and reduced in summer for DPPH; however, the opposite pattern shows by N. commune. Although the total phenolic content of N. commune recorded a significant relation, N. muscarum was non-significant. The Cyanophyta algae show prominent growth responses and antioxidant activities and are better adapted to changing climatic conditions. Due to their prompt responses, even to minor changes in the aquatic environment, they can be used as ecological indicators in freshwater ecosystems.
评估了两种藻类，普通念珠藻和念珠藻，在三个溶剂（甲醇、丙酮和乙醚）中的水、抗氧化活性、藻类色素、总抗氧化活性、DPPH、总酚化合物的季节变化。他们还测定了 Gali Ali Bag 的水的理化和细菌学特性。在不同季节，水质参数发生了显著变化，通常夏季升高，冬季降低，并且存在明显的相关性。这两种藻类在春季和夏季积累了更多的光合作用和辅助色素，而在冬季则显著减少。通过三因素方差分析和克鲁斯卡尔-沃利斯检验分析了两种藻类的抗氧化能力。然而，所有溶剂的含量都有显著差异。此外，N. muscarum 在冬季对 DPPH 的清除能力最高，夏季则降低；然而，N. commune 的模式则相反。尽管普通念珠藻的总酚含量存在显著关系，但 N. muscarum 则不显著。蓝藻表现出明显的生长响应和抗氧化活性，并且更能适应气候变化。由于它们的快速反应，即使是在水生环境的微小变化，它们也可以作为淡水生态系统的生态指标。
