The main aim of the present study was to determine the effects of a seaweed-based biostimulant’s supplementation on the growth of Chlorella variabilis. A liquid extract from Kappaphycus alvarezii (K-sap) was prepared and supplemented in the growth medium from 0.2 to 5% concentrations. The supplementation of K-sap increased the growth and photosynthetic performance of C. variabilis. Addition of 0.4% K-sap increased the biomass production by about 59% compared to the control culture. The highest lipid and neutral lipid productivities were observed in 0.6% K-sap-supplemented culture, which were around 50 and 100% higher than that of the control culture, respectively. Addition of 1% K-sap increased the carbohydrate accumulation in the cells by about 50%. These results suggest that the supplementation of a seaweed-based biostimulant effectively enhances the growth and biofuel potential of microalgae.

本研究的主要目的是确定基于紫菜的生物刺激剂的添加对变异小球藻生长的影响。制备了来自Kappaphycus alvarezii（K-sap）的液体提取物，并在生长培养基中添加了0.2％至5％的浓度。补充K-汁液可提高变异梭菌的生长和光合性能。与对照培养物相比，添加0.4％的K-汁液可将生物量产量提高约59％。在补充了0.6％钾液的培养物中观察到最高的脂质和中性脂质生产率，分别比对照培养物高约50％和100％。添加1％的K-树液会使细胞中的碳水化合物积累增加约50％。这些结果表明，补充基于海藻的生物刺激剂可有效增强微藻的生长和生物燃料的潜力。