School of Environment and Energy, Peking University-Shenzhen Graduate School, Shenzhen, 518055, China.
Department of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC, 27695, USA.
Planta. 2018 Aug;248(2):489-498. doi: 10.1007/s00425-018-2899-5. Epub 2018 May 19.
Microalgae treated with blue light have potential for production of human nutrition supplement and biofuel due to their higher biomass productivity and favorable fatty acid composition. Chlorella vulgaris, Chlorella pyrenoidosa, Scenedesmus quadricauda and Scenedesmus obliquus are representative green microalgae which are widely reported for algal production. In this study, we provide a systematic investigation of the biomass productivity, photosynthetic pigments, chlorophyll fluorescence and fatty acid content of the four green microalgae. The strains were grown in two primary monochromatic light wavelengths [red and blue LEDs (light emitting diode)], and in white LED conditions, respectively. Among them, blue LED light was determined as the best light for growth rate, followed by red LED and white LED. The chlorophyll generation was more sensitive to the monochromatic blue light. The polyunsaturated fatty acids (PUFAs) such as α-linolenic acid (18:3), which were perfect for human nutrition supplementation, showed high concentrations in these algae strains under blue LED. Collectively, the results indicate that the blue LED is suitable for various food, feed, and algal biofuel productions due to both biomass and fatty acid productivity.
经蓝光处理的微藻由于其更高的生物量生产力和有利的脂肪酸组成，具有生产人类营养补充剂和生物燃料的潜力。小球藻、蛋白核小球藻、四尾栅藻和斜生栅藻是代表性的绿色微藻，它们被广泛报道用于藻类生产。在这项研究中，我们系统地研究了这四种绿色微藻的生物量生产力、光合色素、叶绿素荧光和脂肪酸含量。这些菌株分别在两种主要单色光波长[红色和蓝色发光二极管（LED）]和白色 LED 条件下生长。其中，蓝色 LED 被确定为最佳生长速率光源，其次是红色 LED 和白色 LED。叶绿素的产生对单色蓝光更为敏感。多不饱和脂肪酸（PUFAs）如α-亚麻酸（18:3），非常适合人类营养补充，在这些藻类菌株在蓝色 LED 下表现出高浓度。总的来说，由于生物量和脂肪酸生产力，结果表明蓝色 LED 适合各种食品、饲料和藻类生物燃料的生产。
