Journal
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
Volume 101, Issue 8, Pages 3121-3130Publisher
SPRINGER
DOI: 10.1007/s00253-017-8106-y
Keywords
Water-soluble yellow pigment; Monascus ruber; ORP; High glucose stress
Categories
Funding
- National Natural Science Foundation of China [31271925]
- Special Project on the Integration of Industry, Education and Research of Guangdong Province, China [2013B090600015]
- Science and Technology Program of Guangzhou, China [2014J4100192]
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Monascus pigments are secondary metabolites of Monascus species and are mainly composed of yellow pigments, orange pigments and red pigments. In this study, a larger proportion of Monascus yellow pigments could be obtained through the selection of the carbon source. Hydrophilic yellow pigments can be largely produced extracellularly by Monascus ruber CGMCC 10910 under conditions of high glucose fermentation with low oxidoreduction potential (ORP). However, keeping high glucose levels later in the culture causes translation or a reduction of yellow pigment. We presume that the mechanism behind this phenomenon may be attributed to the redox level of the culture broth and the high glucose stress reaction of M. ruber CGMCC 10910 during high glucose fermentation. These yellow pigments were produced via high glucose bio-fermentation without citrinin. Therefore, these pigments can act as natural pigments for applications as food additives.
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