铊(Tl),高科技产业的关键要素,被美国环保署和欧盟认定为优先污染物。Tl积累威胁水生生态系统。尽管它有毒性,人们对它对蓝藻的影响知之甚少。本研究探讨了蓝藻中Tl(I)毒性的生化机制,专注于生理学,新陈代谢,氧化损伤,和抗氧化反应。为此,鱼腥草和念珠石暴露于400微克/升,和7天内800µg/L的Tl(I)。鱼腥草显示出优异的Tl(I)积累,在400µg/L时去除7.8%,在800µg/L时去除9.5%,而念珠果去除2.2%和7.4%,分别。Tl(I)暴露显着降低了光合作用速率和功能,比在Nostoc.它还改变了初级代谢,增加糖水平,导致更高的氨基酸和脂肪酸水平。虽然Tl(I)在两个物种中都诱导细胞损伤,鱼腥草受到的影响较小。这两个物种都增强了它们的抗氧化防御系统,鱼腥草显示在高Tl(I)剂量下SOD水平增加175.6%。这表明鱼腥草的强大的生物吸附和抗氧化系统可以有效地去除Tl(I)。这项研究提高了我们对Tl(I)毒性的理解,容忍度,和蓝细菌中的植物修复,帮助未来的生物修复策略。
这项研究提出了使用鱼腥草和Nostocmuscorum修复th(Tl)植物的新见解,对于解决高科技产业日益增长的污染问题至关重要。阐明这些蓝细菌物种对Tl(I)暴露的耐受机制和生理反应。它突出了鱼腥草作为一种有效的生物修复剂的潜力,提供可持续的解决方案,以减轻Tl(I)对环境的影响。
Thallium (Tl), a key element in high-tech industries, is recognized as a priority pollutant by the US EPA and EC. Tl accumulation threatens aquatic ecosystems. Despite its toxicity, little is known about its impact on cyanobacteria. This study explores the biochemical mechanisms of Tl(I) toxicity in cyanobacteria, focusing on physiology, metabolism, oxidative damage, and antioxidant responses. To this end, Anabaena and Nostoc were exposed to 400 µg/L, and 800 µg/L of Tl(I) over seven days. Anabaena showed superior Tl(I) accumulation with 7.8% removal at 400 µg/L and 9.5% at 800 µg/L, while Nostoc removed 2.2% and 7.4%, respectively. Tl(I) exposure significantly reduced the photosynthesis rate and function, more than in Nostoc. It also altered primary metabolism, increasing sugar levels and led to higher amino and fatty acids levels. While Tl(I) induced cellular damage in both species, Anabaena was less affected. Both species enhanced their antioxidant defense systems, with Anabaena showing a 175.6% increase in SOD levels under a high Tl(I) dose. This suggests that Anabaena\'s robust biosorption and antioxidant systems could be effective for Tl(I) removal. The study improves our understanding of Tl(I) toxicity, tolerance, and phycoremediation in cyanobacteria, aiding future bioremediation strategies.
This study presents novel insights into
thallium (Tl) phycoremediation using Anabaena laxa and Nostoc muscorum, crucial for addressing the increasing contamination concerns stemming from high-tech industries. Elucidating the tolerance mechanisms and physiological responses of these cyanobacterial species to Tl(I) exposure. It highlights the potential of Anabaena laxa as an effective bio-remediator, offering a sustainable solution to mitigate Tl(I) environmental impact.