Light stimulated 'shunt-metabolism' succinate-alpha-ketoglutarate-isocitrate cycle and accumulation of citric acid in Aspergillus niger.Experientia. 1976 Dec 15; 32(12):1506-7.E
Studies with light of the visible range had shown that light plays significant role in the biosynthesis and accumulation of citric acid in Aspergillus niger. Accumulation of 14C-labelled carbon atoms in alpha-ketoglutaric, isocitric, succinic and glycolic acids in the cultures grown under illumination suggest a probable 'shunt-metabolism' leading to the succinate-alpha-ketoglutarate-isocitrate (SKI) cycle. This shunt metabolism minimizes the accumulation of citric acid in cultures due to depletion of intermediates.