GLORIA — GEOMAR Library Ocean Research Information Access

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Critical Evidence for Somatic Doubling of Chromosomes in a Top Yeast (1952)

ROYAN, SARASWATHY ; SUBRAMANIAM, M. K.

[s.l.] : Nature Publishing Group

Nature 169 (1952), S. 932-932

add to mindlist on the mindlist

Details

ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] Spontaneous tetraploidy has been observed periodically4 in our control strain, BY 1. It was absent in the top yeast5, BY 2. Recently, rare pictures of somatic doubling of chromosomes were observed in smears of the top yeast, BY 2, stained by the Feulgen technique6 (Fig. 1). Proof of somatic ...

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1038/169932a0

Permalink

	Location	Call Number	Limitation	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Studies on the cytology of yeasts (1953)

Royan, Saraswathy

Springer

Archives of microbiology 19 (1953), S. 267-286

add to mindlist on the mindlist

Details

ISSN: 1432-072X

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Summary 1. Unorthodox methods of approach appear to be responsible for the radical divergences in views regarding the identification of the various organelles in a budding yeast cell. 2. The problems of yeast cytology are analysed, and the necessity to distinguish the cytological behaviour of an aerobically growing culture from an anaerobic one is emphasized. 3. Photomicrographic proof for mitosis is offered in a purely aerobic strain of yeast having a pair of unequal chromosomes. 4. The chromatin mass seen at early prophase resolves itself into the pair of unequal metaphase chromosomes. These reproduce and the mother cell and bud regularly receive an unequal pair. 5. Evidence for somatic pairing and synapsis is presented. The reconstitution of the nucleus in the telophase takes place by an exact reversal of the stages leading to the metaphase thus proving chromosome continuity. 6. The cytological behaviour of the rare spontaneous autotetraploids arising in normal diploid cultures is illustrated and their significance in genetic investigations discussed. 7. A pictographic summary of the mitotic cycle is given.