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| 1 | 对虾池塘养殖过程中纤毛虫的动态变化及改性粘土防控初探显示文摘纤毛虫是一类单细胞原生动物,部分类群是对虾池塘养殖过程中的病害生物。该研究跟踪了2020年7~10月凡纳滨对虾(Penaeus vannamei)养殖过程中纤毛虫的动态变化情况,分析了多种环境因素对其动态变化的影响。通过现场喷洒,发现改性粘土对纤毛虫有一定的控制作用;故结合室内实验,探究了改性粘土对水体中纤毛虫的去除作用和机制。研究结果表明,虾池内纤毛虫及2~5μm微微藻的密度变化呈现出一定的捕食-被捕食关系,后者可通过食物丰歉的方式上行控制纤毛虫;虾池水温为20~25℃时更易于纤毛虫生长;纤毛虫偏好较低盐度的环境。在养殖过程中使用改性粘土调控水质会在一定程度上降低水体中的纤毛虫的密度;进而通过室内实验初步探讨了改性粘土对水体中的纤毛虫的去除作用及机制,发现氧化复合改性的硫酸铝改性粘土(MC II)可有效去除纤毛虫,该研究将为对虾养殖过程中纤毛虫病害的防控工作提供参考。 | 刘正宇 俞志明 宋秀贤 曹西华 | 2022 | 海洋与湖沼2022，53，5： | 1 |
| 2 | Integration of metabolomics and transcriptomics revealed the biosynthetic mechanism of anti-parasitic compounds in Salinivibrio proteolyticus strain YCSC6显示文摘The fermentation broth of Salinivibrio proteolyticus strain YCSC6 shows potent anti-parasitic activity against Uronema marinum,with activity varying in each fermentation stage.To investigate the biosynthetic mechanism of anti-parasitic compounds in strain YCSC6,a comprehensive analysis of metabolomics and transcriptomics over four diff erent time points(12,24,48,and 72 h)was performed.Metabolomics detected 17943 metabolites with 1129 known metabolites.A trend analysis of the known metabolites showed that 575 metabolites,including 69 polyketides,were continuously enhanced,being the potential source of anti-parasitic agents.In addition,941 genes mapped to the same pathways of these metabolites,were screened through the association analysis of metabolites and genes.KEGG pathway enrichment of these genes showed 270 genes mapped to the biosynthesis of secondary metabolites and 192 genes mapped to the biosynthesis of antibiotics.This demonstrates the potent secondary metabolic capacity of strain YCSC6.Finally,a gene-metabolite correlation network was created based on the 575 continuously enhanced metabolites and 43 continuously up-regulated genes.This revealed 13 genes at the key position that mapped to a putative metabolic pathway associated with the biosynthesis of polyketides and caprylic acid,which contributes to the potent anti-parasitic activity of strain YCSC6.This comprehensive analysis of metabolomics and transcriptomics provides insights into the biosynthetic mechanisms of anti-parasitic compounds in strain YCSC6 and guides the exploitation of more anti-parasitic agents for aquaculture. | Guangxun DU Lingyun QU Ping GAO Wenhao HUANG Chenghua LI Dewen DING | 2022 | Journal of Oceanology and Limnology2022，40，1： | 0 |
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