DNA reduplication cycle during chromosome polytenization in the salivary gland cells of Chironomus thummi larvae. III. the determination of the duration of the DNA synthesis period
Gundrina, L.I.; Sherudilo, A.I.; Mitina, R.L.
Tsitologiia 26(8): 927-935
1984
ISSN/ISBN: 0041-3771 PMID: 6495395 Document Number: 241614
The duration of DNA synthesis in the salivary gland cells of Chironomus thummi larvae of the IV instar was determined by means of autoradiography and cytophotometry. Cells of different levels of ploidy differ in the duration of their DNA synthesis period. The tS of 2(10)c and 2(11)c cells was equal to 17 and 22 hours, respectively. The doubling of DNA content of the chironomid salivary gland cells leads to a 1.3 time increase in the duration of S-phase.