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Caryologia
International Journal of Cytology, Cytosystematics and Cytogenetics
Volume 22, 1969 - Issue 3
196
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Original Articles

Observations on a Vesicular Particle Associated with the Chromatin of the Nuclei of Tradescantia Staminate-Hair Cells

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Pages 269-278 | Received 15 Mar 1969, Published online: 30 Jan 2014
 

SUMMARY

A particle of about 500 A in diameter has been shown to be associated with the peripheral chromatin of chromosomes. This particle thought to be vesicular in nature, has been named « perichromatin vesicle » (PV). These particles change in number during the different phases of the mitotic cycle (Fig. 1), with the maximum number present in early telophase. It is suggested that these perichromatin vesicles may be involved in establishing connections between the chromosomes and the nuclear membrane.

RIASSUNTO

Viene descritta una particella che si trova associata con il materiale cromatinico periferico dei cromosomi; per la sua natura presumibilmente vescicolare, gli è stato attribuito il nome di « vescicola pericromatinica » (PV). Il suo diametro è di circa 500 A ed essa subisce caratteristiche variazioni numeriche nelle diverse fasi del ciclo mitotico (Fig. 1), con il massimo numero di vescicole presenti all'inizio della telofase. Viene avanzata l'ipotesi che le vescicole pericro- matiniche possano stabilire una connessione tra cromosomi e membrana nucleare.

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