PDF(Pubmed)
Abstract：
Water eutrophication has emerged as a pressing concern for massive algal blooms, and these harmful blooms can potentially generate harmful toxins, which can detrimentally impact the aquatic environment and human health. Consequently, it is imperative to identify a safe and efficient approach to combat algal blooms to safeguard the ecological safety of water. This study aimed to investigate the procedure for extracting total flavonoids from Z. bungeanum residue and assess its antioxidant properties. The most favorable parameters for extracting total flavonoids from Z. bungeanum residue were a liquid-solid ratio (LSR) of 20 mL/g, a solvent concentration of 60%, an extraction period of 55 min, and an ultrasonic temperature of 80 °C. Meanwhile, the photosynthetic inhibitory mechanism of Z. bungeanum residue extracts against M. aeruginosa was assessed with a particular focus on the concentration-dependent toxicity effect. Z. bungeanum residue extracts damaged the oxygen-evolving complex structure, influenced energy capture and distribution, and inhibited the electron transport of PSII in M. aeruginosa. Furthermore, the enhanced capacity for ROS detoxification enables treated cells to sustain their photosynthetic activity. The findings of this study hold considerable relevance for the ecological management community and offer potential avenues for the practical utilization of resources in controlling algal blooms.
摘要：
水体富营养化已成为大量藻华的紧迫问题，这些有害的花朵可能会产生有害的毒素，这会对水生环境和人类健康产生不利影响。因此,必须确定一种安全有效的方法来对抗藻类繁殖，以维护水的生态安全。本研究旨在研究从Z.bungeanum渣中提取总黄酮的工艺，并评估其抗氧化性能。从Z.bungeanum渣中提取总黄酮的最有利参数是液固比（LSR）为20mL/g，溶剂浓度为60%，提取时间为55分钟，超声波温度为80℃。同时,评估了Z.bungeanum残留物提取物对铜绿分枝杆菌的光合抑制机制，并特别关注浓度依赖性毒性作用。Z.Bungeanum残留物提取物破坏了析氧复合物结构，影响能量捕获和分配，并抑制PSII在铜绿分枝杆菌中的电子传输。此外，增强的ROS解毒能力使处理的细胞能够维持其光合活性。这项研究的结果与生态管理社区具有相当大的相关性，并为控制藻华的实际利用资源提供了潜在的途径。
