摘要
麻痹性贝类毒素(paralytic shellfish toxins,PSTs)是由某些甲藻产生的一种高毒性神经毒素,在海洋环境中分布广、危害大,可对水产养殖和人类健康造成重大危害;PSTs毒素的毒性大小随种类和结构的不同有较大差异。迄今,国内外学者针对PSTs的来源分布、迁移转化、生物合成及其影响因素等开展了大量的调查研究,但目前对于藻细胞产毒的生物合成途径、遗传学特征及其环境调控机理等研究仍处于起步阶段。PSTs的生物合成过程不仅与藻细胞自身生长阶段有关,还会受到光照、温度、营养盐等多种环境因素的影响,环境条件的改变会引起藻细胞毒素组成和含量发生不同程度的变化。近年来,研究人员应用基因组学和蛋白质组学技术,发现了产生PSTs的典型甲藻——亚历山大藻(Alexandrium)细胞内与PSTs毒素生物合成相关的某些基因或蛋白质,对我们更清晰地了解亚历山大藻产生PSTs毒素的机制具有重要意义。本文综合以往的研究报道,对亚历山大藻中PSTs的生物合成与转化及其主要影响因素进行了总结,以期为产毒有害藻华的防治提供科学依据。
Paralytic shellfish toxins(PSTs)are highly toxic neurotoxins produced by dinoflagellates.They are widely distributed in the marine environment and can cause great harm to aquaculture animals and human health.The toxicity of PSTs varies greatly with type and structure.Many studies have been conducted on the source,distribution,transformation,biosynthesis and factors influencing paralytic shellfish toxins.However,studies on the environmental regulatory mechanism,the biosynthetic pathway,and the genetic characteristics of toxin production are still rare.The biosynthesis of PSTs is affected by many environmental factors,such as light,temperature,and nutrients.A change in environmental conditions will change the composition and content of the toxins to varying degrees.Some researchers have used genomics and proteomics techniques to screen and identify genes or proteins related to the biosynthesis of toxins in Alexandrium.It is important to understand the biosynthetic pathway of Alexandrium toxins more clearly.Based on the toxinproducing physiology of Alexandrium,this study summarizes the biosynthesis and transformation of the PSTs in Alexandrium and the main factors affecting synthesis to provide new ideas for preventing and controlling harmful algal blooms,reducing the damage of harmful algal blooms,and ensuring human health and marine ecological security.
作者
宋维佳
宋秀贤
俞志明
李靖
张悦
SONG Wei-jia;SONG Xiu-xian;YU Zhi-ming;LI Jing;ZHANG Yue(Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Laboratory of Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《海洋科学》
CAS
CSCD
北大核心
2022年第9期117-129,共13页
Marine Sciences
基金
国家自然科学基金项目(41976148)
山东省重大科技创新工程项目(2019JZZY010808)
2019年度“泰山学者攀登计划”(泰山学者工程专项经费资助)。
关键词
甲藻
麻痹性贝类毒素
生物合成
环境因素
dinoflagellates
paralytic shellfish toxins
biosynthesis
environmental factors
