Growth and toxin production of paralytic shellfish toxin producing dinoflagellate in relation with adaptation mechanism to nutritional environment.
麻痹性贝类产毒素甲藻的生长和毒素产生与营养环境适应机制的关系。
基本信息
- 批准号:14360123
- 负责人:
- 金额:$ 9.54万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2002
- 资助国家:日本
- 起止时间:2002 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1.Alexandrium tamarense and A.catenella, causative dinoflagellates of paralytic shellfish poisoning (PSP), showed selective use of amino acids for their nitrogen source, indicating that they possess some specific mechanism for incorporation of amino acids such as amino acid transporter.2.Ability to utilize organic N-source could not be confirmed for A.minutum, suggesting that nutritional character is different each other even within a same genus of Alexandrium.3.A.tamarense and A.catenella were found to use nitrate prior to organic nitrogen when these nitrogen sources coexist and to reduce their photosynthetic activity when they are using amino acid. These results suggest that these species can adapt to various nutritional environment by switching the nutrition mode between autotroph and heterotroph.4.Existence of PSP toxin binding protein was confirmed and suggested this type of toxin might explain the decrease of toxin contents in the process of amino acid utilization in A.tamarense and A.catenella.5.Examination under dark condition suggested that utilization of amino acid is one of the survival strategies for Alexandrium under unsuitable environmental condition for photosynthetic autotrophy.6.cDNAs encoding proteins involving photosynthesis and utilization of amino acid were isolated and a part of their gene expression patterns was recognized.7.Occurrence and toxin contents of Alexandrium in natural environment were suggested to be more closely related to the concentration of amino acid than that of nitrate or nitrite. In addition, excretion of scallop was found to significantly promote the growth and toxin production of A.tamarense and A.catenella.8.Growth and toxin production were examined for the Alexandrium isolated from Malaysian waters to collect basic data for the elucidation of expanding mechanisms of toxic dinoflagellates.
1.麻痹性贝类中毒(PSP)的致病鞭毛藻tamarense Alexandrium和A.catenella表现出对氨基酸的选择性利用,表明它们具有氨基酸转运体等特定的氨基酸掺入机制。对有机氮源的利用能力不能被证实,这表明即使在同一属的亚历山大属植物中,营养特性也各不相同。当氮源共存时,tamarense和A.catenella优先使用硝酸盐,当它们使用氨基酸时,它们的光合活性降低。这些结果表明,这些物种可以通过在自养和异养之间转换营养模式来适应各种营养环境。证实了PSP毒素结合蛋白的存在,认为这类毒素可能解释了柽柳和青霉在氨基酸利用过程中毒素含量降低的原因。5.暗光条件下的检测表明,氨基酸利用是亚历山大菌在不适宜的光合自养环境下的生存策略之一。研究分离出了与光合作用和氨基酸利用有关的编码蛋白质的cdna,并识别了其部分基因表达模式。自然环境中亚历山大菌的发生和毒素含量与氨基酸的关系比与硝酸盐和亚硝酸盐的关系更密切。此外,还发现扇贝的排泄能显著促进A.tamarense和a. catenella的生长和毒素产生。8.对马来西亚海域分离的亚历山大菌的生长和毒素产生进行了研究,为阐明有毒鞭毛藻的扩散机制收集基础数据。
项目成果
期刊论文数量(18)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Takehiko Ogata: "Studies on growth and toxin production of causative dinoflagellates of paralytic shellfish poisoning"Nippon Suisan Gakkaishi. 68・3. 309-312 (2002)
Takehiko Ogata:“麻痹性贝类中毒致病甲藻的生长和毒素产生的研究”Nippon Suisan Gakkaishi 68・3(2002)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Salinity effect on growth and toxin production of four tropical Alexandrium species (Dinophyceae).
- DOI:10.1016/j.toxicon.2005.01.007
- 发表时间:2005-05
- 期刊:
- 影响因子:0
- 作者:P. Lim;T. Ogata
- 通讯作者:P. Lim;T. Ogata
First report of Alexandrium taylori and Alexandrium peruvianum (Dinophyceae) in Malaysia waters
- DOI:10.1016/j.hal.2004.07.001
- 发表时间:2005-02
- 期刊:
- 影响因子:6.6
- 作者:P. Lim;G. Usup;C. Leaw;T. Ogata
- 通讯作者:P. Lim;G. Usup;C. Leaw;T. Ogata
First report of Alexandrium taylori and Alexandrium peruvianum (Dinophyiceae) in Malaysia waters.
马来西亚水域首次报告亚历山大藻和秘鲁亚历山大藻(甲藻科)。
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:YOSHINAKA;Satoshi;S.Satoh et al.;Lim Po Teen
- 通讯作者:Lim Po Teen
麻ひ性貝毒原因渦鞭毛藻の成長・毒生産に関する生理生化学的研究
导致麻痹性贝类中毒的甲藻生长和产毒的生理生化研究
- DOI:
- 发表时间:2002
- 期刊:
- 影响因子:0
- 作者:Jun Harada;緒方 武比古
- 通讯作者:緒方 武比古
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OGATA Takehiko其他文献
OGATA Takehiko的其他文献
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{{ truncateString('OGATA Takehiko', 18)}}的其他基金
Growth and toxin production of causative dinoflgellates for paralytic shellfish poisoning in the environment of bivalve culture farm
双壳类养殖场环境中麻痹性贝类中毒致病甲藻的生长和毒素产生
- 批准号:
18380125 - 财政年份:2006
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Proteinaceous toxin selected from causative dinoflagellates of paralytic shellfish poisoning and its effect on crustacean
麻痹性贝类中毒致病甲藻蛋白质毒素及其对甲壳类动物的影响
- 批准号:
11660209 - 财政年份:1999
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Growth competition between toxic dinoflagellate, Alexandrium, and diatom.
有毒甲藻、亚历山大藻和硅藻之间的生长竞争。
- 批准号:
08660257 - 财政年份:1996
- 资助金额:
$ 9.54万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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