Effect of agitation speed on the morphology of Aspergillus niger HFD5A-1 hyphae and its pectinase production in submerged fermentation

Figure 1 Effect of agitation speeds on pectinase, fungal growth and protein content by Aspergillus niger HFD5A-1 at 6 d cultivation time.

Figure 2 Mycelial morphology of Aspergillus niger HFD5A-1 observed with naked eyes at different agitation speeds at 6 d cultivation time. A: Static condition; B: 50 rpm; C: 100 rpm; D: 150 rpm; E: 200 rpm; F: 250 rpm.

Figure 3 Mycelial morphology of Aspergillus niger HFD5A-1 observed under light microscope at different agitation speeds at 6 d cultivation time. A: Static condition; B: 50 rpm; C: 100 rpm; D: 150 rpm; E: 200 rpm; F: 250 rpm.

Figure 4 Scanning electron microscopy micrographs of the mycelial morphology Aspergillus niger HFD5A-1 at different agitation speed at 6 d cultivation time. A: 0 rpm; B: 50 rpm; C: 150 rpm; D: 200 rpm.