Monday, April 30, 2007

Red pigment production from Monascus purpureus strains

Sasithorn Kongruang and Chatchawan Singhapol. Division of Biotechnology, Department of Agro-Industrial Technology, Faculty of Applied Science, King Mongkut’s Institute of Technology North Bangkok, 1518 Pibulsongkram Road, Bangsue, Bangkok, 10800, Thailand

Red pigment production  from Monascus purpureus TISTR 3002 and Monascus
purpureus TISTR 3179 were studied in  six formulas of the modified Yeast Malt Broth mediums with two different nitrogen sources. The influence of nitrogen sources derived from soy bean flour and monosodium glutamate (MSG) to the growth and pigment production were compared. Colors of the excreted pigments were tested for the stability under the defined condition.  Results found that of Monascus purpureus TISTR 3179 produced the highest pigment in formula 1 (peptone, yeast extract, malt extract, soybean and cassava flour) and this fungi showed higher pigment production than strain 3002 in most formulas. Soybean was the better source for the nitrogen than monosodium glutamate in pigment production for both strains. Color stability showed MSG had the lower percentage loss than soy bean flour when samples were kept for 3 days at pH 7.