Achievements have been made on the research in the influence of light on the algal growth. While the mechanism of the influence remains unclear in many aspects. The dynamic growth of Scenedesmus quadricauda cells was observed with the parallel plate flow chamber device and the computer vision technology in the study. The effect of different light intensity on the growth of Scenedesmus quadricauda were studied at a single cell scale. The individual growth curve model of Scenedesmus quadricauda has been established, which fitted the measured data well. The results showed that the largest maximum volumic growth rate of algal cells appeared under 8000lux light intensity, which could be regarded as the optimal light intensity for Scenedesmus quadricauda. The appropriate light conditions could increase algal cell's size before division. The algal cell's size before division increased with the increase of light intensity when it was lower than 8000lux. While the size decreased with the increase of light intensity when it was higher than 8000lux. In addition, higher light intensity was advantageous for an algal cell to adapt to the new environment and to reduce the time required for the algae recruitment.
娄孝飞, 杜延生, 张海平. 基于细胞尺度的光照对四尾栅藻生长的影响[J]. 中国环境科学, 2020, 40(11): 5020-5026.
LOU Xiao-fei, DU Yan-sheng, ZHANG Hai-ping. Effect of light intensity on the growth of Scenedesmus quadricauda at cell scale. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(11): 5020-5026.
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