About: Organ growth without cell division: somatic polyploidy in a moth, Ephestia kuehniella

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About: Organ growth without cell division: somatic polyploidy in a moth, Ephestia kuehniella Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Organ growth depends on cell division and cell growth. Here, we present a study on two organs whose growth depends entirely on cell growth, Malpighian tubules and silk glands of Ephestia kuehniella. We determined the number of endocyles required to reach these stages by Feulgen cytometry. Cells of Malpighian tubules were in the 2C stage in first instar larvae and reached 1024C after 9 endocycles in last instar larvae (1C = 0.45 pg DNA). Silk gland cells already reached a DNA content of 8C-16C in first instar larvae and attained up to 8192C in last instar larvae after a total of 12 endocycles. The nuclei were small and spherical in first instar larvae, but they were huge, flat, and bizarrely branched in last instar larvae. We consider branching as a compensatory adaptation to improve molecular traffic between nucleus and cytoplasm in highly polyploid cells (i) by reducing the mean distance between nucleus and cytoplasm and (ii) by enlarging the surface-to-volume ratio of these nuclei. Organ growth depends on cell division and cell growth. Here, we present a study on two organs whose growth depends entirely on cell growth, Malpighian tubules and silk glands of Ephestia kuehniella. We determined the number of endocyles required to reach these stages by Feulgen cytometry. Cells of Malpighian tubules were in the 2C stage in first instar larvae and reached 1024C after 9 endocycles in last instar larvae (1C = 0.45 pg DNA). Silk gland cells already reached a DNA content of 8C-16C in first instar larvae and attained up to 8192C in last instar larvae after a total of 12 endocycles. The nuclei were small and spherical in first instar larvae, but they were huge, flat, and bizarrely branched in last instar larvae. We consider branching as a compensatory adaptation to improve molecular traffic between nucleus and cytoplasm in highly polyploid cells (i) by reducing the mean distance between nucleus and cytoplasm and (ii) by enlarging the surface-to-volume ratio of these nuclei. (en)
Title	Organ growth without cell division: somatic polyploidy in a moth, Ephestia kuehniella Organ growth without cell division: somatic polyploidy in a moth, Ephestia kuehniella (en)
skos:prefLabel	Organ growth without cell division: somatic polyploidy in a moth, Ephestia kuehniella Organ growth without cell division: somatic polyploidy in a moth, Ephestia kuehniella (en)
skos:notation	RIV/60077344:_____/12:00384781!RIV13-AV0-60077344
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(IAA600960925)
http://linked.open...iv/cisloPeriodika	11
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Marec, František
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Biologické centrum AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	157061
http://linked.open...ai/riv/idVysledku	RIV/60077344:_____/12:00384781
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	genome size; C-value; cell size (en)
http://linked.open.../riv/klicoveSlovo	genome size C-value cell size
http://linked.open...odStatuVydavatele	CA - Kanada
http://linked.open...ontrolniKodProRIV	[4D909D88CD29]
http://linked.open...i/riv/nazevZdroje	Genome
http://linked.open...in/vavai/riv/obor	EB
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Evolutionary history of sex chromosomes in Lepidoptera
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	55
http://linked.open...iv/tvurceVysledku	Marec, František Buntrock, L. Krueger, S. Traut, W.
http://linked.open...ain/vavai/riv/wos	000311897800002
issn	0831-2796
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1139/g2012-060

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