Dikaryon is from Greek, di meaning 2 and karyon meaning nut, referring to the cell nucleus.

The dikaryon is a nuclear feature which is unique to some fungi, in which after plasmogamy the two compatible nuclei of two cells pair off and cohabit without karyogamy within the cells of the hyphae, synchronously dividing so that pairs are maintained in the older cells while newer cells or hyphal tips are also binucleate, i.e. dikaryotic; in the Ascomycota this attribute of the nuclei to do such is only found in the Ascogenous hyphae but is the dominant phase in the Basidiomycota. The formation of a dikaryon is a plesiomorphic character for the subkingdom Dikarya, which covers both the Basidiomycota and Ascomycota. The formation of croziers in the Ascomycota and of clamp connections in the Basidiomycota facilitate maintenance of the dikaryons. However, some fungi in each of these phyla have evolved other methods for maintaining the dikaryons, and therefore neither croziers nor clamp connections are ubiquitous in either phylum.

See also

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External links

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  • dikaryon — dikaryon. См. дикарион. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Dikaryon — Ein Heterokaryon ist eine Zelle mit unterschiedlichen, nicht verschmolzenen Zellkernen, die sich in einer gemeinsamen Zellmembran befinden. Ein Dikaryon ist ein Paar von unterschiedlichen Zellkernen in einem Heterokaryon. Beides kommt zum… …   Deutsch Wikipedia

  • dikaryon — di·kary·on also di·cary·on ( )dī kar ē .än, ən n 1) a pair of associated but unfused haploid nuclei of a fungus cell capable of participating in repeated cell division as separate entities prior to their ultimate fusion 2) a cell having or a… …   Medical dictionary

  • dikaryon — di·kar·y·on (dī kărʹē ŏn , ən) n. The state in certain fungi in which each compartment of a hypha contains two nuclei, each derived from a different parent.   [di 1 + Greek karuon, nut, kernel; see karyo .] * * * …   Universalium

  • dikaryon — di·karyon …   English syllables

  • dikaryon — …   Useful english dictionary

  • дикарион — dikaryon дикарион. Kлетка гриба, содержащая два не слившихся ядра (мужское и женское) и образующаяся в результате полового процесса у аско или базидиомицетов; в генетике соматических клеток Д. клеточный гибрид с двумя ядрами. (Источник: «Англо… …   Молекулярная биология и генетика. Толковый словарь.

  • Basidiomycota — Taxobox name = Basidiomycota image width = 250px image caption = Basidiomycetes from Ernst Haeckel s 1904 Kunstformen der Natur regnum = Fungi subregnum = Dikarya phylum = Basidiomycota phylum authority = R.T. Moore, 1980 [cite journal | author …   Wikipedia

  • Ascus — An ascus (plural asci) is the sexual spore bearing cell produced in ascomycete fungi. On average, asci normally contain 8 ascospores, produced by a meiotic cell division followed, in most species, by a mitotic cell division. However, asci in some …   Wikipedia

  • Piptoporus betulinus — Taxobox name = Birch Bracket image width = 200px regnum = Fungi phylum = Basidiomycota classis = Agaricomycetes ordo = Polyporales familia = Fomitopsidaceae genus = Piptoporus species = P. betulinus binomial = Piptoporus betulinus binomial… …   Wikipedia

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