Fig. 7From: Improving the productivity of malic acid by alleviating oxidative stress during Aspergillus niger fermentationTime course of fermentation of A. niger strains. a Growth profiles of RG0095, RG0580, RG0581 and RG0582 on potato dextrose agar (PDA) plates at 28 °C for 48 h; b expression analysis of the indicated genes by qRT-PCR in RG0095 and RG0580, RG0581 and RG0582; c glucose consumption; d malic acid production. e Malic acid productivity. Data represent the mean ± SD of three independent replicates. Statistical significance was determined by Student’s t-test (n = 3). *p < 0.05, **p < 0.01Back to article page