气候变化领域集成服务门户(CCPortal): Impact of elevated pCO2 on paralytic shellfish poisoning toxin content and composition in Alexandrium tamarense

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DOI	https://doi.org/10.1594/PANGAEA.835715
	Impact of elevated pCO2 on paralytic shellfish poisoning toxin content and composition in Alexandrium tamarense
	Van de Waal; Dedmer B; Eberlein; Tim; John; Uwe; Wohlrab; Sylke; Rost; Bjoern
发布日期	2014-09-12
数据集类型	dataset
英文关键词	Alexandrium tamarense ; Bottles or small containers/Aquaria ( 20 L) ; Chromista ; Gene expression (incl. proteomics) ; Growth/Morphology ; Immunology/Self-protection ; Laboratory experiment ; Laboratory strains ; Myzozoa ; Not applicable ; Pelagos ; Phytoplankton ; Primary production/Photosynthesis ; Single species
英文简介	Ocean acidification is considered a major threat to marine ecosystems and may particularly affect primary producers. Here we investigated the impact of elevated pCO2 on paralytic shellfish poisoning toxin (PST) content and composition in two strains of Alexandrium tamarense, Alex5 and Alex2. Experiments were carried out as dilute batch to keep carbonate chemistry unaltered over time. We observed only minor changes with respect to growth and elemental composition in response to elevated pCO2. For both strains, the cellular PST content, and in particular the associated cellular toxicity, was lower in the high CO2 treatments. In addition, Alex5 showed a shift in its PST composition from a nonsulfated analogue towards less toxic sulfated analogues with increasing pCO2. Transcriptomic analyses suggest that the ability of A. tamarense to maintain cellular homeostasis is predominantly regulated on the post-translational level rather than on the transcriptomic level. Furthermore, genes associated to secondary metabolite and amino acid metabolism in Alex5 were down-regulated in the high CO2 treatment, which may explain the lower PST content. Elevated pCO2 also induced up-regulation of a putative sulfotransferase sxtN homologue and a substantial down-regulation of several sulfatases. Such changes in sulfur metabolism may explain the shift in PST composition towards more sulfated analogues. All in all, our results indicate that elevated pCO2 will have minor consequences for growth and elemental composition, but may potentially reduce the cellular toxicity of A. tamarense.
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/217327
推荐引用方式 GB/T 7714	Van de Waal,Dedmer B,Eberlein,et al. Impact of elevated pCO2 on paralytic shellfish poisoning toxin content and composition in Alexandrium tamarense.2014-09-12.https://doi.org/10.1594/PANGAEA.835715.