Temperature and salinity effects and toxicity of Gambierdiscus caribaeus (Dinophyceae) from Thailand
Temperature and salinity effects and toxicity of Gambierdiscus caribaeus (Dinophyceae) from Thailand
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DOI：
10.2216/15-111.1
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发表时间：
2016-03
期刊：
影响因子：
1.6
通讯作者：
W. Tawong;T. Yoshimatsu;H. Yamaguchi;Masao Adachi
中科院分区：
文献类型：
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作者：
W. Tawong;T. Yoshimatsu;H. Yamaguchi;Masao Adachi
摘要：底栖甲藻属Gambierdiscus是热带和亚热带地区引起雪卡毒素中毒（CFP）的毒素的推定生产者。虽然在泰国已经报道了CFP事件和caribaeus的分布，但对促进泰国甘比铁饼生长的条件知之甚少。因此，本研究旨在确定温度和盐度及其相互作用对泰国鲤鱼生长的影响。该菌株在IMK/2培养基中细胞产量最高。从生长速率（μ）来看，在20°C ~ 35°C的温度范围和20 ~ 40的盐度范围内，泰国绿螯虾生长良好。试验菌株的次优生长条件（≥最大生长速率的80%）为20.5℃~ 30.5℃，盐度为25.0 ~ 37.5。最佳条件为25℃，盐度为30。此外，泰国绿螯虾对小鼠显示出高毒性。我们的研究结果表明，高达35°C的耐受性可能使这些生物分布在热带地区，包括泰国，那里的水温经常超过30°C。
Abstract: Species of the benthic dinoflagellate genus Gambierdiscus are the putative producer of the toxins causing ciguatera fish poisoning (CFP) in tropical and subtropical areas. Although CFP events and distribution of G. caribaeus have been reported in Thailand, little is known about the conditions that enhance the growth of Gambierdiscus in Thailand. Hence, this study was aimed at determining the effects of temperature and salinity and their interactions on the growth of Thai G. caribaeus. The strain tested showed the highest cell yield in IMK/2 medium. Based on growth rate (μ), Thai G. caribaeus grew in the temperature range of 20°C–35°C and the salinity range of 20–40. The suboptimal condition (≥ 80% of the maximal growth rate) for the strain tested was 20.5°C–30.5°C and salinity of 25.0–37.5. The optimal condition was 25°C and salinity of 30. Furthermore, the Thai G. caribaeus revealed high toxicity to mice. Our results suggest that tolerance of up to 35°C may allow these organisms to be distributed in tropical areas, including Thailand, where the water temperature often exceeds 30°C.