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  Encyclopedia of Keywords > Nuclei > Dikaryon   Michael Charnine

Keywords and Sections
MONOKARYONS
PRONUNCIATIONS
CELL
CENTURIES OLD
LIFE CYCLE
RUST FUNGI
INTERMEDIATE STAGE
FRUITING BODIES
GROWTH
CELL NUCLEUS
ASCOMYCETES
BASIDIOMYCETES
FILAMENTOUS
MYCELIUM
HYPHA
PLASMOGAMY
NUCLEI
KARYOGAMY
BASIDIUM
CLAMP CONNECTIONS
DIKARYON
Review of Short Phrases and Links

    This Review contains major "Dikaryon"- related terms, short phrases and links grouped together in the form of Encyclopedia article.

Definitions

  1. Dikaryon is from Greek, di meaning 2 and karyon meaning nut, refering to the nucleus of the cell.
  2. The dikaryon is a prolonged mycelial stage in which the nuclei from each mating partner remain together without fusing.
  3. The dikaryon is a prolonged mycelial stage that can be induced to develop a multicellular structure, the mushroom, under proper environmental conditions.
  4. The dikaryon is long lasting but ultimately gives rise to either fruitbodies with basidia or directly to basidia without fruitbodies.

Monokaryons

  1. The compatible monokaryons produce dikaryon, which form an elaborate multicellular fruit body, as shown in a left picture.

Pronunciations

  1. Definition of dikaryon from Merriam-Webster's Medical Dictionary with examples and pronunciations.

Cell

  1. Dikaryon: a pair of closely associated, sexually compatible nuclei, may or may not be derived from a different parent hypha or cell.

Centuries Old

  1. The dikaryon may live and grow for years, and some are thought to be many centuries old.

Life Cycle

  1. Describe what is meant by a "dikaryon" and where this stage fits within the life cycle of an Ascomycete fungus.
  2. This begins the dikaryon stage of the life cycle.

Rust Fungi

  1. RECEPTIVE HYPHAE - special hyphae arising from spermagonia of rust fungi; the spermatia from other spermagonia fuse with them and initiate the dikaryon.

Intermediate Stage

  1. Their nuclei will remain separate during the initial stages - this intermediate stage is called the dikaryon.

Fruiting Bodies

  1. Under appropriate conditions, the dikaryon will produce fruiting bodies.

Growth

  1. The maintenance of the two nuclei during the growth of the dikaryon clearly is important for completion of the sexual cycle.

Cell Nucleus

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

Ascomycetes

  1. ASCOMYCOTINA - Subphylum of Dikaryomycota; form endogenous meiospores in asci and have a restricted dikaryon; generally called Ascomycetes.

Basidiomycetes

  1. Fusion of primary mycelia produces a dikaryon, which gives rise to the fruiting body, as in basidiomycetes.

Filamentous

  1. A filamentous dikaryon arises after fusion of two compatible haploid strains.
  2. After cell fusion, a filamentous dikaryon, which is able to infect the plant, is formed.
  3. The dikaryon grows filamentous and is able to induce tumors in maize plants.

Mycelium

  1. Dikaryon: A hyphal compartment, mycelium or fungal cell occupied by a pair or pairs of closely associated, genetically different, sexually compatible nuclei.

Hypha

  1. D Dikaryon a hypha or portion of hyphae which contains two haploid nuclei in each cell (see monokaryon, heterokaryotic).

Plasmogamy

  1. After plasmogamy, the nuclei from each parent join, but do not fuse (there are two nuclei), which forms a dikaryon.
  2. Plasmogamy between compatible individuals leads to delayed karyogamy leading to establishment of a dikaryon.

Nuclei

  1. The single hypha produced by fusion typically has two nuclei per "cell", and is known as a dikaryon, meaning "two nuclei".
  2. The nonclamped hyphae contained a single nucleus per cell (monokaryon), while the clamped hyphae contained two nuclei per cell (dikaryon).
  3. The two nuclei in the dikaryon eventually fuse to produce a diploid cell—that is, a cell that contains one nucleus with two sets of chromosomes.

Karyogamy

  1. Karyogamy is delayed, so that the compatible nuclei remain in pairs, called a dikaryon.
  2. Having entered the plant the dikaryon induces tumors in its host in which massive proliferation of fungal material, karyogamy and spore formation occur.

Basidium

  1. The paired dikaryon in the basidium fuse (i.e karyogamy takes place).
  2. The mycelium within this structure remains as a dikaryon, diploid formation only occurring within the modified hyphal tip called the basidium.

Clamp Connections

  1. Maintenance of the dikaryon requires elaborate septum formation (clamp connections, Fig 10.) during growth and nuclear division.
  2. Then the resulting dikaryon divides through clamp connections so that the dikaryon state is maintained.

Dikaryon

  1. The compatible nuclei of the dikaryon merge forming a diploid nucleus that then under goes meiosis and ultimately internal ascospore formation.
  2. The formation of a dikaryon is a pleisiomorphic character for the subkingdom Dikarya, which covers both the Basidiomycota and Ascomycota.
  3. The dikaryon in basidiomycetes is maintained through cell division by the production of clamp connections, as shown in the figure above from here.

Categories

  1. Nuclei
  2. Karyogamy
  3. Cytoplasm > Plasmogamy
  4. Basidium
  5. Hypha
  6. Books about "Dikaryon" in Amazon.com

Book: Keywen Category Structure


  Short phrases about "Dikaryon"
  Originally created: May 27, 2008.
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