4.7 Article

Rising CO2 will increase toxicity of marine dinoflagellate Alexandrium minutum

期刊

JOURNAL OF HAZARDOUS MATERIALS
卷 431, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.jhazmat.2022.128627

关键词

Paralytic shellfish toxins; Rising CO2; Harmful algal bloom; Alexandrium minutum; LC-MS

资金

  1. Shandong Province Natural Science Foundation of China [ZR2019MD026]
  2. Joint Funds of the National Natural Science Foundation of China [U1806202]

向作者/读者索取更多资源

Increasing levels of CO2 can promote the growth and toxicity of toxic dinoflagellate Alexandrium minutum, leading to an increase in paralytic shellfish toxins (PSTs) production. This study highlights the potential risk of ocean acidification on the formation and evolution of harmful algal blooms.
Ocean acidification caused by increasing emission of carbon dioxide (CO2) is expected to have profound impacts on marine ecological processes, including the formation and evolution of harmful algal blooms (HABs). We designed a set of experiments in the laboratory to examine the effects of increasing CO2 on the growth and toxicity of a toxic dinoflagellate Alexandrium minutum producing paralytic shellfish toxins (PSTs). It was found that high levels of CO2 (800 and 1200 ppm) significantly promoted the growth of A. minutum compared to the group (400 ppm) representing the current CO2 level. The total yields of PSTs by A. minutum, including both intracellular and extracellular toxins, were significantly enhanced, probably due to the induction of core enzyme activity and key amino acids synthesis for PST production. More interestingly, high level of CO2 promoted the transformation from gonyautoxin2 & 3 to gonyautoxin1 & 4 and depressed the release of PSTs from inside to outside of the cells. All these processes collectively led to an apparent increase of A. minutum toxicity. Our study demonstrated that rising CO2 would increase the risk of toxic A. minutum based on the comprehensive analyses of different processes including algal growth and toxin synthesis, transformation and release.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据