The spectrum of light and nutrients required to increase the production of phycocyanin <i>Spirulina platensis</i>

Abstract

Spirulina platensis is one of the microalgae that have several active ingredients that can be&#13;\nused in fisheries, pharmaceuticals, food additives and cosmetics, and one of them contains a high level of&#13;\nphycocyanin. Different light qualities can be used to increase the production of cyanobacterium&#13;\nphycocyanin. Some of the light spectrum can affect pigment synthesis, and besides that, nutrients are&#13;\nalso very important to maintain the quantity, quality and production of Spirulina platensis in the&#13;\nbiosynthesis of phycbiliprotein (phycocyanin and phycoerythrin). This study aims to determine whether&#13;\nthere was an influence from a combination of the color spectrum of light and nutrient composition on the&#13;\nphycocyanin production of Spirulina platensis. The research method was experimental. The study used a&#13;\ncombination of two light spectra (red and blue) as well as two different nutrients (Walneand technical&#13;\nnutritional modification and MT). Each treatment combination was repeated four times. The results&#13;\nshowed that the light spectrum and nutrient composition had an effect on Spirulina platensis production.&#13;\nThe combination of the nutrient MT and red spectrum resulted in the highest production of phycocyanin&#13;\nand a dry weight of Spirulina of 5.1078 mgg-1 and 0.6677/0.5 g L-1 respectively. This was significantly&#13;\ndifferent (P&lt;0.05) compared to the other treatment combinations.