Antifouling activity exhibited by pyrrolo compound isolated from marine sponge associated bacterium Halobacillus kuroshimensis SNSAB01 against barnacles

IF 4.1 2区 环境科学与生态学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY International Biodeterioration & Biodegradation Pub Date : 2024-11-29 DOI:10.1016/j.ibiod.2024.105960
S. Nalini , S. Venkatnarayanan , D. Inbakandan , Clarita Clements , S.U. Mohammed Riyaz , T. Stalin Dhas , P. Sriyutha Murthy , G. Dharani
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Abstract

The increasing use of natural products from marine organisms and their synthetic analogs as antifouling agents is replacing chemical biocides due to their ecological compatibility. This study evaluated the antifouling potential of pyrrolo compound (PC) from the sponge-associated bacterium Halobacillus kuroshimensis against the barnacle Amphibalanus reticulatus larval survival, metamorphosis and settlement in the laboratory. The successful concentrations were also subjected to field based static immersion tests to study the efficacy of the PC extract on macrofouling settlement. Results showed decreased naupliar survival and affected larval metamorphosis in a dose-dependent manner, with varying sensitivity among developmental stages. Higher PC concentrations significantly reduced cyprid yield and settlement, with over 50% of cyprid larvae failing to settle at concentrations of 1300 μg/ml and above. Field experiments confirmed a steady decline in barnacle settlement on PC-treated coupons, with less than 50% settlement observed at concentrations of 500–2000 μg/ml over 50 days. The LC50/EC50 ratio for nauplius N-II was 1.11, with higher ratios observed in later stages and for the cypris (1.66), suggesting moderate toxicity and a narrow margin of safety. These ratios suggest barnacle settlement inhibition occurring through a toxic mechanism. The results demonstrate the compound's ability to disrupt barnacle settlement, but also raise concerns about its environmental impact (long-term usage), particularly the potential risks to non-target species before using the compound in real-world antifouling applications. Despite higher concentrations used compared to previous reports, PC shows potential as an effective natural antifouling compound.
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从海绵伴生菌黑岛盐杆菌SNSAB01中分离的吡咯啉化合物对藤壶的防污活性研究
由于其生态兼容性,越来越多地使用海洋生物的天然产物及其合成类似物作为防污剂,正在取代化学杀菌剂。本研究在实验室研究了海绵体相关菌黑岛盐杆菌(Halobacillus kuroshimensis)的pyrrolo化合物(PC)对网纹Amphibalanus reticulatus幼虫的生存、蜕变和沉降的防污潜力。还对成功的浓度进行了基于现场的静态浸泡试验,以研究PC提取物对宏观污垢沉降的影响。结果显示,剂量依赖性地降低了幼虫的存活率并影响了幼虫的变态,在不同的发育阶段具有不同的敏感性。较高的PC浓度显著降低了塞浦路斯的产量和沉降,在1300 μg/ml及以上的浓度下,超过50%的塞浦路斯幼虫不能沉降。现场实验证实,在pc处理过的样品上,藤壶沉降稳步下降,在500-2000 μg/ml浓度下,50天内的沉降低于50%。naplius N-II的LC50/EC50比值为1.11,后期较高,鲤的LC50/EC50比值为1.66,毒性中等,安全边际较窄。这些比率表明藤壶沉降抑制是通过毒性机制发生的。研究结果表明,该化合物具有破坏藤壶沉降的能力,但也引起了人们对其环境影响(长期使用)的担忧,特别是在将该化合物用于实际防污应用之前,对非目标物种的潜在风险。尽管与之前的报道相比,PC的使用浓度更高,但它显示出作为一种有效的天然防污化合物的潜力。
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来源期刊
CiteScore
9.60
自引率
10.40%
发文量
107
审稿时长
21 days
期刊介绍: International Biodeterioration and Biodegradation publishes original research papers and reviews on the biological causes of deterioration or degradation.
期刊最新文献
Lignite degraded by Trichoderma citrinoviride: Products, processes and mechanisms Antifouling activity exhibited by pyrrolo compound isolated from marine sponge associated bacterium Halobacillus kuroshimensis SNSAB01 against barnacles Editorial Board Biochemical and chemical markers associated with biodeterioration agents isolated from archive audio-visual materials Biodeterioration of chrome-tanned leather and its prevention strategies
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