Optimization of medium composition and culture conditions for agarase production by Agarivorans albus YKW-34 |
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Authors: | Xiao Ting Fu Hong Lin Sang Moo Kim |
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Affiliation: | aCollege of Food Science and Engineering, Ocean University of China, Qingdao 266003, China;bFaculty of Marine Bioscience and Technology, Kangnung-Wonju National University, 120 Gangneungdaehangno, Gangneung 210-702, Republic of Korea |
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Abstract: | Effect of medium composition and culture conditions on agarase production by Agarivorans albus YKW-34 was investigated in shake flasks. The most suitable carbon source, nitrogen source, and culture temperature were agar, yeast extract, and 25 °C, respectively, for agarase production by one-factor-at-a-time design. The nutritional components of the medium and culture conditions were analyzed by Plackett–Burman design. Among the nine factors studied, agar, yeast extract, and initial pH had significant effects on agarase production (p < 0.05). The optimum levels of these key variables were further determined using a central composite design. The highest agarase production was obtained in the medium consisting of 0.23% agar and 0.27% yeast extract at initial pH 7.81. The whole optimization strategy enhanced the agarase production from 0.23 U/ml to 0.87 U/ml. The economic medium composition and culture condition as well as the dominant occupation of agarase with high activity in culture fluid enlighten the potential application of A. albus YKW-34 for the production of agarase. |
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Keywords: | Agarase Agarivorans albus Enzyme production Optimization Plackett– Burman design Central composite design |
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