极端嗜盐绿色杜氏藻混合培养技术的研究
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摘要
极端嗜盐绿色杜氏藻(D.viridis)是一种单细胞海洋微藻,具有较为独特的生物特性,对温度、盐度的适应能力很强,尤其是嗜盐性在生物界中是最强的。极端嗜盐绿色杜氏藻中含有多种营养成分和生物活性物质,具有很好的开发和应用前景,对其进行大规模培养意义重大。
     以往,对极端嗜盐绿色杜氏藻大都采用光能自养培养的方式,培养效果不大好。为提高效率,本论文提出通过添加不同的有机盐—葡萄糖、蛋白胨、卤虫干粉及发酵液对其进行混合营养培养的方法,并对培养过程中的藻形、藻的生物量等方面进行考察与分析。
     实验分两阶段进行:首先往18oBé盐度下的培养液中加入不同浓度的营养盐对绿色杜氏藻进行培养,以找出该盐度下营养盐的最适范围,再以此浓度为参考值,改变培养液的盐度对藻进行培养,从而找出有利于极端嗜盐绿色杜氏藻生长的最佳条件。
     通过以上系统的研究工作,不仅验证了极端嗜盐绿色杜氏藻的混合培养的设想和可能性,更为极端嗜盐绿色杜氏藻的混合培养提供了较为系统的基础数据。混合培养能大大提高藻的生物量使藻提前进入生长指数期,缩短培养时间,增加产量,大幅降低产品成本,增强绿色杜氏藻的国际市场竞争力,从而会取得可观的经济效益和社会效益。
The extreme halotolerant green alge Dunaliella viridis (D. viridis) is a kind of unicellular ocean algae,and it has special biological characteristic and stronger adaptable ability to temperature and salinity.Especially its characteristic of tolerance to salinity is the strongest among all other biology. Because it contains manifold nutrimental components and biological active substances, it has good foreground of exploiture and appliance and the large-scale culture of D. viridis is of great importance.
     In the past, extreme halotolerant green alge Dunaliella viridis (D. viridis) was only cultured by the phototrophic way ,but the result wasn't very good.In order to raise efficiency, this thesis put forward a method by which we increased different organic nutriments—glucose,peptone , ferment liquid and power of Artemia to D. viridis to carry on mixotrophic culture and during the period of culture we could investigate and analyse the form and biomass of D. viridis.
     The experiment had two stages:first we put different organic nutriments to culture medium of D.viridis under 18oBésalinity to find out the most suitable concentration of nutriment,second we took former concentration as a reference , then changed salinity of culture medium to culture D.viridis and find the best condition .
     The above study not only proved the assumption and possibility but also provided the basic date of mixotrophic culturing extreme halotolerant D.viridis. The mixotrophic culture of extreme halotolerant D.viridis improved the biomass of algae greatly and brought forwards the exponential period of algae,consequently it shortened the time,increased the production, decreased the manufacturing cost,strengthened our product competition in the international market and obtained considerable economic and social benefits.
引文
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