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Short-term effects of different nitrogen substrates on growth and toxin production of dinoflagellate Alexandrium catenella Balech (strain ACDH)
Li, Tian-Shen1,2; Yu, Ren-Cheng1; Zhou, Ming-Jiang1
2011-12-01
Source PublicationHARMFUL ALGAE
Volume12Pages:46-54
SubtypeArticle
AbstractBlooms of Alexandrium catenella were frequently found in sea areas adjacent to the estuary of the Changjiang River in spring of the last several years, often in association with large-scale blooms of Prorocentrum donghaiense. It was considered that the increasing intensity of these dinoflagellate blooms was related to the incremental nutrient influx from the Changjiang River over the last 40 years, especially the "excess" nitrogen (N) input. A nutrient-addition experiment was then designed to study the responses of a strain (ACDH) of A. catenella, isolated from the East China Sea, to the addition of different N substrates, including nitrate, ammonium and urea. It was found that N-starved cells of strain ACDH could use all the three N substrates as the sole N source to grow, with similar specific growth rate and maximum cell density. All the three N substrates could elevate cellular toxin content shortly after the addition of nutrients, but cellular toxin content of the urea group was much lower than the nitrate group and the ammonium group. In the following days, the cellular toxin content of the urea group was even lower than the N-limited control group, but cellular toxin contents of the nitrate group and ammonium group were still comparable to the control. It was presumed, based on these findings, that a relatively slower N uptake and assimilation rate occurred in the urea group, and urea-N adsorbed was preferentially utilized for growth rather than toxin synthesis. Therefore, urea in natural seawater could promote the formation of algal blooms, but decrease the toxicity, of strain ACDH. (C) 2011 Elsevier B.V. All rights reserved.
KeywordAlexandrium Catenella Ammonium Harmful Algal Bloom Nitrate Paralytic Shellfish Poisoning Urea
DOI10.1016/j.hal.2011.08.011
Indexed BySCI
Language英语
WOS IDWOS:000299146400005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/32929
Collection海洋生态与环境科学重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Monitoring Ctr Marine Environm, Beihai 536000, Guangxi, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Tian-Shen,Yu, Ren-Cheng,Zhou, Ming-Jiang. Short-term effects of different nitrogen substrates on growth and toxin production of dinoflagellate Alexandrium catenella Balech (strain ACDH)[J]. HARMFUL ALGAE,2011,12:46-54.
APA Li, Tian-Shen,Yu, Ren-Cheng,&Zhou, Ming-Jiang.(2011).Short-term effects of different nitrogen substrates on growth and toxin production of dinoflagellate Alexandrium catenella Balech (strain ACDH).HARMFUL ALGAE,12,46-54.
MLA Li, Tian-Shen,et al."Short-term effects of different nitrogen substrates on growth and toxin production of dinoflagellate Alexandrium catenella Balech (strain ACDH)".HARMFUL ALGAE 12(2011):46-54.
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