Gibberellic acid, amino acids (glycine and L-leucine), vitamin B₂ and zinc as factors affecting the production pigments by <i>Monascus purpureus</i> in a liquid culture using response surface methodology

Abstract

The combined effects of zinc, gibberellic acid, vitamin B₂, amino acids (glycine and L-leucine) on pigment production were evaluated in a liquid culture of Monascus purpureus. In this study, response surface design was used to optimize each parameter. The data were analyzed using Minitab 14 software. Five parameters were applied by using response surface methodology for pigment production in liquid cultures. Four zinc, 11 gibberellic acids, three vitamins B₂, eleven and fifteen amino acids (glycine and L-leucine) respectively; levels were evaluated. The highest production of pigment was reached with a 10 mg/l vitamin B₂, 50 mg/l gibberellic acid and 50 mg/l glycine amino acid.

Keywords: Monascus purpureus, response surface methodology, amino acid, gibberellic acid, zinc, vitamin B₂

African Journal of Biotechnology, Vol 13(12), 1484-1490