来自中国的生产PST的Microseira wollei的第一份报告揭示了其新型毒素特征
Youxin Chen1, Yongguang Jiang2, Zhongshi He3
1CAS Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
Harmful algae
|July 13, 2024
概括
产生性贝类毒素 (PST) 的Microseira wollei,一种形成花的蓝藻细菌,首次在中国被发现. 这一发现突显了该地区有毒底蓝菌带来的新环境风险.
科学领域:
- 环境微生物学 环境微生物学
- 蓝藻细菌毒理学 蓝藻细菌毒理学
- 水生生态学 水生生态学
背景情况:
- 麦克罗西拉·沃莱 (Microseira wollei) 是一种全球分布的,形成花朵的盆地蓝藻细菌,以产生毒素和引起味道和气味问题而闻名.
- 以前,生产PST的M. wollei种群仅在北美记录,而生产CYN的种群仅限于澳大利亚.
研究的目的:
- 来自中国西湖的盆地蓝菌菌株的识别和特征.
- 为了研究在中国发现的M. wollei菌株的毒素产生能力和家族遗传关系.
主要方法:
- 用于菌株鉴定,进行了形态学和遗传学分析 (16S rDNA).
- 使用sxtA基因的检测和液体染色学-并联质谱法 (UPLC-MS/MS) 来确认PST的产生.
- 进行了PST生物合成基因集群 (sxt) 的序列分析.
主要成果:
- 来自中国西湖的四种盆地蓝菌菌株被确定为M. wollei.
- 证实了CHAB5998菌株是产生PST的菌株,含有十种PST变种,包括M. wollei.的六种新型变种.
- 遗传学分析揭示了PST产生和非PST产生菌株的不同类型,这表明sxt基因中的水平基因转移 (HGT) 事件.
结论:
- 这项研究报告了在北美以外地区首次出现产生PST的M. wollei,并将其确定为中国第一个有毒的淡水盆地蓝藻细菌.
- 这些研究结果表明,谷蓝菌可能在中国构成比以前理解的更大的环境风险.
- 有证据表明,横向基因转移在M. wollei.中PST生物合成的进化中发挥了重要作用.
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