Screeing of some microorganisms for red pigments production in different media, and identification of the most promising culture
2010
Ismail, M.M.N. | Gewaily, E.M. | Bedrous, V.S. | Mohamed, G.M.
The potential for red pigments production by some microorganisms isolated from different sources was evaluated. A total of twelve isolates were able to produce red pigments on 7 different isolation media, however, the three isolates; ZLI, ZL2 and ZL3 showed more potential in pigments production. Based on phenotypic and electron microscopic investigations, the isolate ZL1 was characterized as Monascus spp. The fungal isolates Monascus spp. and the reference (authentic) strain Monascus purpureus 4066 resulted highest values of absorbance of extracellular red pigments (2.470 U and 1.929 U) when measured by Spectrophotometer at 500 nm after 10 days of growth on two fermentation media; yeast extract-malt extract (YM) and first fermentation (Fl) broth media, respectively. Therefore, the high production yield of red pigments by these fungal isolates demonstrates a possibility of commercial production of such natural colourant that might be used in manufacturing processes
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