THE ADAPTABILITY OF THE METHYLOTROPHIC YEAST CANDIDA-BOIDINII ON MEDIA CONTAINING PECTIC SUBSTANCES

The methylotrophic yeast Candida boidinii is able to utilize pectic su bstances as the only carbon source. The primary utilization of methano l released from pectin is followed by adaptation to pectate medium. Th e duration of activation of a secondary pathway was critical for survi val of yeast in the absence of other carbon sources. The utilization o f pectin-containing media is associated with the production of pectic enzymes. The main polygalacturonase activities were found within the u pper layer of the cell wall as shown by the method of gradual ultrason ication.