Nuclear behavior during conidiogenesis inAspergillus flavus

摘要

Nuclear behavior during conidiogenesis inAspergillus flavuswas studied cytologically and through the analysis of conidial chains in heterokaryons. Many nuclei migrate into the vesicle and one or more are incorporated into phialides. The nuclear constitution of each phialide is independent of all others and, for the most part, all conidia in a chain are identical. The analysis of 105 conidial chains, containing an average of seven conidia each, indicated that each chain was either homokaryotic for one spore-color type or was heterokaryotic. Seven chains, each with one to three deviant spores, were mixed. Occasionally random binucleate conidia were observed within uninucleate chains.