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Fig. 4 | Microbial Cell Factories

Fig. 4

From: Improving citric acid production of an industrial Aspergillus niger CGMCC 10142: identification and overexpression of a high-affinity glucose transporter with different promoters

Fig. 4

Observation of mycelial morphology and verification of production and productivity of citric acid in the 30 L bioreactor fermentation. A Observation of mycelial morphology of A. niger 20-15 (20-15), A. niger 21-8 (21-8) and A. niger CGMCC 10142 (10142) strain at different time points of fermentation; B Verification of citric acid production of 20-15, 21-8 and 10142 strain at different time points in the 30 L bioreactor fermentation; C Verification of citric acid productivity of 20-15, 21-8 and 10142 strain at different time points in the 30 L bioreactor fermentation; D The citric acid production of 20-15, 21-8 and 10142 strain at 56 and 64 h in the 30 L bioreactor fermentation; E The citric acid productivity of 20-15, 21-8 and 10142 strain at 56 and 64 h in the 30 L bioreactor fermentation. The samples at each time-point with different letters differ significantly (abc, P < 0.05)

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