Macronucleo
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A macronucleus (formerly also meganucleus) is the larger type of nucleus in ciliates. Macronuclei are polyploid and undergo direct division without mitosis. It controls the non-reproductive cell functions, such as metabolism. During conjugation, the macronucleus disintegrates, and a new one is formed by karyogamy of the micronuclei.
Research
1,322 papers- Evolution of amitosis of the ciliate macronucleus: gain of the capacity to divide.The Journal of protozoology · 1991
- Origin, structure and function of millions of chromosomes present in the macronucleus of unicellular eukaryotic ciliate, Oxytricha trifallax: a model organism for transgenerationally programmed genome rearrangements.Journal of genetics · 2015
- The Ciliary Protein IFT57 in the Macronucleus of Paramecium.The Journal of eukaryotic microbiology · 2018
- Rearrangement of macronucleus chromosomes correspond to TAD-like structures of micronucleus chromosomes in Tetrahymena thermophila.Genome research · 2020
- Macronucleus structure and macronucleus development in hypotrichous ciliates.The International journal of developmental biology · 1996
via PubMed
Wikidata facts
- Subclass of
- nucleus
Show 3 more facts
- facet of
- Nuclear dimorphism
- found in taxon
- Ciliophora
- exact match
- purl.obolibrary.org/obo/GO_0031039
Sources (3)
via Wikidata · CC0
Article · Italiano
Il macronucleo è il nucleo più grande degli organismi che presentano dimorfismo nucleare, come i ciliati. I macronuclei sono poliploidi e subiscono la divisione diretta (scissione binaria) senza mitosi. Controllano le funzioni cellulari non legate alla riproduzione, quali lo sviluppo e il metabolismo. Il macronucleo contiene centinaia di cromosomi, ciascuno presente in molte copie.
Abstract from DBpedia / Wikipedia · CC BY-SA