【摘要】 在温度为22±1℃ ,盐度为28,硝酸钠浓度分别为75,375,750,1125,1500,1875mg/L的条件下 ,用F/2培养基对青岛海洋大学微藻种质库保存的三角褐指藻(Phaeodactylumtricor-nutum)MACC/B226进行培养 ,测定了生长及脂肪酸组成。实验结果表明 ,在硝酸钠浓度为1125mg/L时 ,三角褐指藻相对生长率最高。在75～375mg/L之间二十碳五稀酸 (EPA)含量随着硝酸钠浓度的增加而增加 ,在375～1875mg/L之间EPA含量变化不大 ,在1875mg/L时达到最高值 (占总脂肪酸的12.6% )。更多还原

【Abstract】 Relative growth rate and fatty acid compositions of Phaeodactylum tricornutum UTEX640 were examined. The glgae were grown under different initial NaNO 3 concentrations (75, 375, 750, 1 125, 1 500 and 1 875 mg/L) and harvested at the late exponential phase. The culture temperature was 22±1 ℃; the salinity was adjusted to 28 by distilled water. The results showed that the optimum NaNO 3 concentration for the highest relative growth rate was 1 125 mg/L. The optimum NaNO 3 concentration for the highest EPA content was 1 875 mg/L.更多还原