To explore the key components in soybean powder which promotes monacolin K (MK) production and screen the alternatives to soybean powder for the production of functional red yeast rice with high MK content,the influences of classical carbon source,glucose,and substrates from soybean on MK production were analyzed using Monascus pilosus MS-1 as the experimental strain and rice as the main fermentation substrate.The results indicated that MK production was enhanced significantly when 3% soy isoflavone or 5% soy protein isolate was added to the substrate (P<0.05).MK production was significantly inhibited when 3% glucose was added to the substrate (P<0.05).However,3% glucose and 5% soy protein isolate showed significantly synergistic effect on MK production when they were used simultaneously (P<0.05).It was more efficient for producing MK when 3% glucose and 5% soy protein isolate were added to the substrate simultaneously.The MK yield were 1.53 and 16.80 times as that of adding soybean powder and control,respectively.The results provide theoretical and technical support,as well as using glucose and soy protein isolate as an alternative to soybean powder for the production of functional red yeast rice with high concentration of MK.
SHI Jia
,
ZHANG Hongmei
,
SU Zijie
,
XU Fang
,
YU Xiang
,
FENG Yanli
. Enhancing monacolin K yield of red yeast rice by adding glucose and substrates from soybean[J]. Food and Fermentation Industries, 2021
, 47(2)
: 182
-187
.
DOI: 10.13995/j.cnki.11-1802/ts.024765
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