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| Content Provider | PubMed Central |
|---|---|
| Author | Rosenberger, R. F. Kessel, M. |
| Abstract | The synchrony of nuclear replication in individual, multinucleate hyphae of Aspergillus nidulans has been investigated. Samples were taken from cultures of germinating conidiospores, and the relative frequency of hyphae containing two to eight nuclei was determined. Because the conidiospores are mononucleate, complete synchrony will yield populations of hyphae containing only 2n nuclei, n being the number of doublings after germination. The appearance of hyphae with total numbers of nuclei other than 2n will indicate lack of synchrony. The relative frequency of hyphae not having 2n nuclei will depend on the degree of synchrony in the individual hyphae; numerical aspects of this relation are discussed. In two different strains, replication of the nuclei in any one hypha was highly synchronized when the dry weight doubling time was 1.4 to 1.8 hr. As the doubling time was made longer by changing the nitrogen or carbon source, synchrony was progressively lost. At the slowest growth rate tested, the interval between the division of the fastest and the slowest nucleus equaled 48% of the dry weight doubling time. The active replication of some nuclei in a hypha where other nuclei were resting suggested that nuclear duplication in this eukaryotic organism may be controlled by specific initiators. |
| Starting Page | 1464 |
| File Format | |
| ISSN | 10985530 |
| e-ISSN | 10985530 |
| Journal | Journal of Bacteriology |
| Issue Number | 5 |
| Volume Number | 94 |
| Language | English |
| Publisher Date | 1967-11-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Molecular Biology Microbiology |
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