1977
DOI: 10.1007/bf02910453
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The premeiotic DNA replication of euchromatin and heterochromatin in Lilium longiflorum (Thunb.)

Abstract: The presynaptic stages of Lilium longiflorum have been analyzed in the light microscope. Seven substages can be defined on the basis of changes in morphology of the heterochromatin and the nucleoli. The duration of the presynaptic interval and the substages has been calculated from bud length measurements and cell stage gradients in the anthers. The premeiotic and somatic DNA replication has been investigated using 3H-thymidine autoradiography. The premeiotic S phase lasts 50 hours whereas the somatic S phase … Show more

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Cited by 57 publications
(39 citation statements)
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“…Regardless of the precise duration of the exclusion, the behavior is impressive because glutaraldehyde appears to act principally on the transient heterochromatin that is so prominent cytologically in premeiotic nuclei. If true, the evidence presented is in line with the radioautographic observations of Holm (8), who noted in Lilium that heterochromatic DNA granules were being labelled almost as late as leptotene.…”
Section: Discussionsupporting
confidence: 88%
“…Regardless of the precise duration of the exclusion, the behavior is impressive because glutaraldehyde appears to act principally on the transient heterochromatin that is so prominent cytologically in premeiotic nuclei. If true, the evidence presented is in line with the radioautographic observations of Holm (8), who noted in Lilium that heterochromatic DNA granules were being labelled almost as late as leptotene.…”
Section: Discussionsupporting
confidence: 88%
“…The transition between the S and G2 phase shows no distinctive change in chromatin morphology, but through both stages many small, similarly shaped chromatin masses are found scattered in the nucleus. Euchromatin threads are extremely faint and discontinuous (2,16). This appearance is seen in cells from buds 10-11 mm long for Georgia and from buds 9-10 mm long for Enchantment lilies.…”
Section: Resultsmentioning
confidence: 93%
“…In budding yeast (SK1 background), mitotic-and meiotic-S phases are about 20 min and 60Y80 min, respectively (Williamson et al 1983, Cha et al 2000. The lengthening of S-phase during meiosis is proposed to reflect the extra time needed for developing additional chromosomal features that are later utilized for meiosis-specific chromosomal metabolism (Holm 1977). Consistent with this notion, the lengthening of meiotic S-phase is dependent on the establishment of DSB-independent homolog pairing mediated by Spo11 (Cha et al 2000).…”
Section: Meitoic S-phase Progressionmentioning
confidence: 98%