ISSN:
1432-119X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary The microspectrophotometric study of the amount of DNA in the course of the interphase of synchronous binucleate cells, experimentally induced in the roots of the onion (Allium cepa), at 30° C, showed that the rate of DNA synthesis does not appear to be constant throughout the interphase, being greater at the beginning and end of the S period and slower during the middle part of the period. We found that the G 1 period occupies from 0% at 10% of the cell cycle, the S period about 81% and G 2 period plus mitosis about 14%. Contrary to our expectations, highly significant differences were found in the DNA content of the two nuclei of more than 1% of the binucleate cells, which suggests that DNA synthesis may be asynchronous in the two nuclei within a common cytoplasm.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00278302
