THE DNA CONTENT OF CENTRIOLES OFNEUROSPORA CRASSADURING DIVISIONS I AND IV OF ASCOSPOROGENESIS

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Abstract
The results of observations of Feulgen-stained preparations of developing asci of Neurospora crassa are presented. Photographic evidence presented shows that the centrioles during Divisions I and IV are Feulgen-positive, and hence contain deoxyribonucleic acid (DNA). The presence of DNA in the centriole provides this extranuclear body with the necessary genetic information for its independent division prior to that of the nucleus. The occurrence of DNA in the centriole is discussed in the light of the centromere-centriole homology. A variation in size of the centriole was noted throughout the 4 divisions of ascosporogenesis.