Aspergillus niger is an important filamentous fungus used for the industrial production of citric acid. One of the most important factors that affect citric acid production is the concentration of manganese(II) ions present in the culture broth. Under manganese(II)-limiting conditions. the fungus develops a pellet-like morphology that is crucial for high citric acid accumulation. https://www.lightemupsequences.com/sale-now-Peperomia-Double-Duty-super-offer/