• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Harmful Algae >Growth dynamics in relation to the production of the main cellular components in the toxic dinoflagellate Ostreopsis cf. ovata
【24h】

Growth dynamics in relation to the production of the main cellular components in the toxic dinoflagellate Ostreopsis cf. ovata

机译：与有毒鞭毛鞭毛藻中主要细胞成分的产生有关的生长动力学。卵形

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In the last decade Ostreopsis cf. ovata blooms have been among the most intense along the entire Mediterranean coast, leading to ecological and human health problems, that are associated with the toxins (palytoxin-like compounds) produced by these algal cells. These compounds are secondary metabolites, whose rates of synthesis depend on the metabolism of their precursors. In general, growth dynamics and toxicity of dinoflagellates reflect the physiological status of the organism. The aim of the present study was to investigate the cellular production of the main biochemical compounds likely involved in the growth and toxicity dynamics of O. cf. ovata during exponential to the late stationary phase in batch cultures of an Adriatic strain. Removal of major nutrients from the medium was monitored along with concentration, biovolume and production of the main cellular components (e.g. polysaccharides, proteins, lipids and toxins). Nutrient uptake, as well as toxin production rates were calculated in the different growth periods. Nutrients (N and P) were completely depleted when cells entered stationary phase and the greatest net toxin production rate (R_(TOX)) occurred during the first days of growth. The various palytoxins reported a relative abundance quite stable during the different growth phases, while the total toxin cellular amount increased along the growth curve. Total and extracellular released polysaccharides, as well as the lipid content increased greatly during the stationary phase, while proteins were mainly produced by cells during the exponential phase. The continuous release of polysaccharides could facilitate cell aggregation and the formation of the benthic community during algal blooms. The trend of production of the main cellular compounds in O. cf. ovata and the growth dynamics of this species lead us to hypothesize that the fast growth of this dinoflagellate, associated with the rapid use of environmental resources (nutrients, and phosphates in particular), may be an ecological/adaptive strategy which could favor this organism in competition with other species.
机译：在过去十年中Ostreopsis cf.卵形花盛开是整个地中海沿岸最密集的物种之一，导致生态和人类健康问题，这些问题与这些藻类细胞产生的毒素（类毒素类似类毒素）有关。这些化合物是次级代谢产物，其合成速率取决于其前体的代谢。通常，鞭毛藻的生长动态和毒性反映了生物体的生理状态。本研究的目的是研究可能与O.cf.的生长和毒性动态有关的主要生化化合物的细胞产生。亚德里亚菌株的分批培养中的指数到静止期后期的卵子。监测培养基中主要营养成分的去除以及主要细胞成分（例如多糖，蛋白质，脂质和毒素）的浓度，生物量和产生。计算了不同生长期的养分吸收以及毒素产生率。当细胞进入静止期时，营养物质（N和P）被完全消耗掉，最大的净毒素产生率（R_（TOX））出现在生长的最初几天。在不同的生长阶段，各种毒素的相对丰度相当稳定，而毒素细胞的总量沿生长曲线增加。在固定期，总的和细胞外释放的多糖以及脂质含量大大增加，而蛋白质主要在指数期由细胞产生。在藻华期间，多糖的持续释放可以促进细胞聚集和底栖群落的形成。主要细胞化合物在O中的生产趋势。卵子和该物种的生长动力学使我们假设，该鞭毛藻的快速生长与快速利用环境资源（尤其是营养物，尤其是磷酸盐）有关，可能是一种生态/适应性策略，可能有利于该生物体的生长。与其他物种的竞争。

著录项

  • 来源
    《Harmful Algae》 |2014年第6期|1-10|共10页
  • 作者

    Laura Pezzolesi; Rossella Pistocchi; Francesca Fratangeli; Carmela DellAversano; Emma Dello Iacovo; Luciana Tartaglione;

  • 作者单位

    Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via S'Alberto 163, 48123 Ravenna, Italy;

    Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via S'Alberto 163, 48123 Ravenna, Italy;

    Department of Biological, Geological and Environmental Sciences (BiGeA), University of Bologna, Via S'Alberto 163, 48123 Ravenna, Italy;

    Department of Pharmacy, University of Naples 'Federico Ⅱ', Via D. Montesano 49, 80131 Naples, Italy;

    Department of Pharmacy, University of Naples 'Federico Ⅱ', Via D. Montesano 49, 80131 Naples, Italy;

    Department of Pharmacy, University of Naples 'Federico Ⅱ', Via D. Montesano 49, 80131 Naples, Italy;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ostreopsis; Palytoxin; Ovatoxin; Proteins; Polysaccharides; Lipids;

    机译：骨质疏松症;毒素卵毒素;蛋白质;多糖;血脂;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号