摘要
研究绿色微囊藻 (Microcystisviridis)在混合条件下的生长特性 ,以及葡萄糖 ,光照强度和pH对绿色微囊藻生长的影响。结果表明 :绿色微囊藻混合营养生长与光能自养生长相比 ,生长速率明显提高 ,对数期延长 ,生物量显著提高 ;随着初始葡萄糖浓度在 0～ 1 8.0 g/l范围内增加 ,同一光照条件下明显提高了藻细胞的生长速率 ,但在初始葡萄糖浓度 1 8.0～ 36.0g/l范围内 ,同一光照条件下葡萄糖浓度的高低对藻细胞的生长速率不再有更大的影响 ;在光照强度 2 4～ 1 1 2 μE·m- 2 ·s- 1 范围内 ,初始葡萄糖浓度相同条件下藻细胞的生长速率及对葡萄糖的藻体得率都随光照强度的增强而增大 ,但当光照强度在 1 1 2～ 2 0 0 μE·m- 2 ·s- 1 时 ,绿色微囊藻的生长速率增加幅度较小 ,出现了光饱和现象 ;当 pH处于 8.0～ 1 0 .0间 ,明显促进了绿色微囊藻的生长 ,偏离该范围越大 ,越抑制绿色微囊藻的生长 。
The growth characteristics and the effects of glucose, light and pH on the growth of Microcystis viridis (A. Br.) Lemm. under mixotrophic conditions have been investigated. The results showed that by comparison, the mixotrophic growth rate was much higher than the photoautotrophic and the exponential phase elongated in the mixotrophic culture. Under same condition, it was evident that the mixotrophic culture of Microcystis viridis produced much biomass than that of the photoautotrophic culture; Under same light intensity, with initial glucose concentrations in the range from 0 to 18.0g/l, higher glucose concentrations favored cell growth more markedly, whereas the concentrations above 18g/l presented only limited improvement on cell growth; Under same initial glucose concentrations, the growth rate and biomass/glucose yield increased with light intensity, ranging from 24 to 112μE·m -2 ·s -1 ; When light intensity was higher than 112μE·m -2 ·s -1 , The range of the growth rate lower Microcystis viridis appeared light saturation. When pH ranging from 8.0 to 10.0, Microcystis viridis growth was promoted obviously; but more deviating from that, more restraining Microcystis viridis growth, even leading to death.
出处
《植物研究》
CAS
CSCD
北大核心
2002年第2期241-246,共6页
Bulletin of Botanical Research
