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光强与光质对钝顶螺旋藻生长及固碳的影响

发表时间:2016-09-30  浏览量:1292  下载量:228
全部作者: 任洪艳,王雪飞,杨玉娟,阮文权
作者单位: 江南大学环境与土木工程学院
摘 要: 光强和光质对微藻生长和固碳极为重要,本文考察5种光强和5种不同颜色光对钝顶螺旋藻生长及固碳过程的影响。实验结果表明,光强3 000 lx时,随着光强逐渐增大,钝顶螺旋藻的生长固碳能力逐渐降低,叶绿素a的合成受到阻碍;适合钝顶螺旋藻生长及固碳的最佳光强为3 000 lx. 光质对钝顶螺旋藻生长及固碳过程有较大影响。红光条件下,钝顶螺旋藻生物量、固碳速率及叶绿素a含量分别可达1.957 g/L、46.466 mg/(L•h)及6.962 mg/L,显著高于其余处理组对应值。红光对钝顶螺旋藻的生长、CO2固定以及叶绿素a的合成最有利。此外,光质对钝顶螺旋藻粗营养成分有较明显的影响。红光利于碳水化合物合成,碳水化合物含量可达0.255 g/g(DW);而蓝光条件下,钝顶螺旋藻蛋白质含量增加,达0.572 g/g(DW);白光作用下,粗脂肪含量最高,达0.127 g/g(DW). 在蓝光、红光下均有所下降。
关 键 词: 大气污染防治工程;钝顶螺旋藻;固碳;光强;光质
Title: Effect of light intensity and light quality on the growth and carbon fixation of Spirulina platensis
Author: REN Hongyan, WANG Xuefei, YANG Yujuan, RUAN Wenquan
Organization: School of Environment and Civil Engineering, Jiangnan University
Abstract: Light intensity and light quality had great influences on the growth and carbon fixation of microalgae. In this paper, the effect of five different doses of light intensity and five kinds of color on the growth and carbon fixation of S. platensis were studied. The result showed that when light intensity was lower than 3 000 lx, the specific growth rate and carbon fixation rate increased as the light intensity increased and the synthesis of chlorophyll a also was promoted. The biomass productivity reached the peak of 1.847 g/L when the light intensity was 3 000 lx. And the specific growth rate, carbon fixation rate and chlorophyll a content were 0.512 d^-1, 42.524 mg/(L•h) and 6.716 mg/L respectively. When light intensity was higher than 3 000 Lx, the carbon fixation rate gradually reduced as the light intensity increased and the synthesis of chlorophyll a was inhibited. The optimum light intensity is 3 000 lx. Light quality also had a great influence on the growth and carbon fixation of S. platensis. The cell growth was markedly stimulated by the red light. The maximal biomass, carbon fixation rate and content of chlorophyll a were 1.957 g/L, 46.466 mg/(L•h) and 6.962 mg/L, respectively. And they were higher than those under other treatments. In addition, light quality had obvious implications for the crude nutrients of S. platensis. Whereas carbohydrate synthesis rate increased under red light and reached 0.255 g/g(DW). Protein synthesis was markedly stimulated by blue light, and the protein content reached 0.572 g/g(DW). Lipid content reached 0.127 g/g(DW) under white light and somewhat decreased under blue and red light conditions.
Key words: air pollution prevention and control project; S. platensis; carbon fixation; light intensity; light quality
发表期数: 2016年9月第18期
引用格式: 任洪艳,王雪飞,杨玉娟,等. 光强与光质对钝顶螺旋藻生长及固碳的影响[J]. 中国科技论文在线精品论文,2016,9(18):1947-1954.
 
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