The effects of fluorescent light and different light-emitting diodes (LEDs) with white, red, green, and blue light on two macroalgal species, Gracilaria lemaneiformis (Rhodophyta) and Ulva lactuca (Chlorophyta), have been investigated via the measurements of growth rates, photosynthesis, and biochemical contents of pigments (i.e., chlorophyll a, carotenoids, and phycobilin) and soluble protein. In the two species, white LEDs showed similar effects to fluorescent lamps on the relative growth rates (RGRs) and gross maximum photosynthetic rate (P_max). In addition, green LEDs contributed to the highest RGRs and P_max in G. lemaneiformis. Interestingly, when compared with fluorescent lamps, green LEDs resulted in a significantly higher P_max in U. lactuca. Furthermore, blue LEDs contributed to the highest RGRs of U. lactuca, while the red LEDs led to the lowest RGRs of U. lactuca. Overall, our study suggests that LEDs are alternative monochromatic light sources to fluorescent lamps in G. lemaneiformis and U. lactuca cultivation.

通过测量生长速率，研究了荧光灯和白，红，绿和蓝光不同的发光二极管（LED）对两个大型藻类物种龙眼兰（Rhodophyta）和Ulva lactuca（Chlorophyta）的影响。色素（即叶绿素a，类胡萝卜素和藻胆素）和可溶性蛋白质的光合作用和生化含量。在这两个物种中，白色LED在相对生长速率（RGR）和总最大光合速率（P _max）方面表现出与荧光灯相似的效果。此外，绿色LED促成了最高RGRs和P_最大的龙须菜。有趣的是，当与荧光灯相比，绿色LED产生了显著更高P_最大值在U.莴苣。此外，蓝色LED导致了U. lactuca的RGR最高，而红色LED导致了U. lactuca的RGR最低。总体而言，我们的研究表明，LED在Lemaneiformis和U. lactuca栽培中是荧光灯的替代单色光源。