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International Journal of Medicinal Mushrooms
Facteur d'impact: 1.423 Facteur d'impact sur 5 ans: 1.525 SJR: 0.431 SNIP: 0.716 CiteScore™: 2.6

ISSN Imprimer: 1521-9437
ISSN En ligne: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushrooms.2018029002
pages 47-57

Developing a Novel Two-Stage Process for Carotenoid Production by Cordyceps militaris (Ascomycetes)

Qianwang Zheng
Institute of Food Biotechnology and College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou, China
Tao Wei
Institute of Food Biotechnology and College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou, China
Yin Lin
Institute of Food Biotechnology and College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
Zhiwei Ye
College of Food Science and Institute of Food Biotechnology, South China Agriculture University, Guangzhou 510642, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510642, China
Jun-Fang Lin
Department of Bioengineering, College of Food Science & Institute of Food Biotechnology, South China Agricultural University, Guangzhou 510640, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
Liqiong Guo
Department of Bioengineering, College of Food Science & Institute of Food Biotechnology, South China Agricultural University, Guangzhou 510640, China; Research Center for Micro-Ecological Agent Engineering and Technology of Guangdong Province, Guangzhou 510640, China
Fan Yun
Alchemy Biotechnology Co., Ltd. of Guangzhou City, Guangzhou 510760, China
Linzhi Kang
Alchemy Biotechnology Co., Ltd. of Guangzhou City, Guangzhou 510760, China

RÉSUMÉ

Natural carotenoids are attracting increasing interest, but their widespread use is limited because of poor production. Cordyceps militaris, a traditional Chinese mushroom, contains a large amount of carotenoids, and this study aimed to increase carotenoid production by C. militaris by optimizing a liquid-state cultivation system. We developed and optimized a novel 2-stage process, including cultivation under shaking in darkness and under static irradiation on a flat panel, using response surface methodology, and we compared this process to common shake-flask cultivation. In addition, we examined the effects of different inducers (chitosan, peanut oil, tomato juice, yeast, and metal ions) on carotenoid production. Results showed that under optimal conditions (4 days of shaking in darkness, 10 days of static irradiation with a 100-mL flat panel volume), a maximum of 1217.5 ± 115.9 μg/g carotenoids were produced; only 662.9 μg/g were produced by common shake-flask cultivation. Only a large amount of chitosan (8 mg) could significantly increase carotenoid content; some of the other inducers showed inhibitory effects. This study demonstrated that this 2-stage process could effectively increase the natural carotenoid content in C. militaris, making it a potential source for commercial exploitation.


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