光照强度对微绿球藻生长及有机质积累的影响

Effect of Light Intensity on Growth Rate and Accumulation of Organics of Nannochloropsis oculata Droop

摘要: 本文以微绿球藻(Nannochloropsis oculata Droop)为材料，在室内研究了光照强度对藻细胞生长及细胞内几种有机物质含量的影响。结果表明，在1000 lx~10,000 lx的光强范围内，比生长速率、可溶性蛋白、类胡萝卜素的含量随光照强度的增加而增加，在5000 lx时达到最高，最高值分别为0.101、3.8%、0.8%，在10,000 lx时反而降低；最高细胞密度随光照强度的增强而增大，10,000 lx时达到最高，为6.52 × 107 mL–1；多糖、总脂含量随光照强度的增加而增加，在2000 lx时达到最高，最高值分别为3.17%、36.95%，在10,000 lx时又降低；叶绿素的含量随光照强度的增强而减小，1000 lx时最高，为0.35%。

Abstract: Influence of light intensities on growth rate and organics contents of Nannochloropsis oculata was studied. The results showed that the light intensity within 1000 lx and 10,000 lx, the specific growth rate, so-luble protein, and carotenoids contents increased at first and reached the maximum under 5000 lx, then de-creaded under 10,000 lx, the maximums are 0.101, 3.8% and 0.8%. The maximal cell density increased with the increase of light intensity, the maximum is 6.52 × 107 mL–1. Polysaccharide and lipid contents increased and reached the maximum under 2000 lx, then decreased with the increase of light intensity, the maximums are 3.17% and 36.95%. Chlorophyll content decreased with increase of light intensity, the maximum is 0.35%.