How are conidiophores formed?
conidium, a type of asexual reproductive spore of fungi (kingdom Fungi) usually produced at the tip or side of hyphae (filaments that make up the body of a typical fungus) or on special spore-producing structures called conidiophores. The spores detach when mature.
What is the structure of Penicillium?
The vegetative structure of Penicillium is a multicellular mycelium. The mycelium is made up of highly branched, multinucleated and septate long thread-like filamentous structure known as hyphae. The cell wall is made up of a glucose polysaccharide and chitin.
What is conidiophore of Penicillium?
Conidiophores are hyaline, smooth or rough-walled. Phialides are usually flask-shaped, consisting of a cylindrical basal part and a distinct neck, or lanceolate (with a narrow basal part tapering to a somewhat pointed apex).
Is Aspergillus a conidiophores?
Conidia of Aspergillus niger are produced on conidiophores. Here, maturation of conidia on these asexual reproductive structures was studied.
What is the purpose of conidiophores?
Conidiophores arise at right angles to the hyphae and are believed to be infectious for humans when mycelia are disturbed. When inhaled, the fungus converts to the yeast form, which is multinucleate, containing 8 to 12 nuclei.
Does Aspergillus have Septate conidiophore?
Where do the conidiophores of an Aspergillus fungus originate? COMMON TO ALL SPECIES: Hyphae are septate and hyaline. The conidiophores originate from the basal foot cell located on the supporting hyphae and terminate in a vesicle at the apex. Vesicle is the typical formation for the genus Aspergillus.
What is formed from flask-shaped conidiophores?
The phialide (/ˈfaɪəlaɪd/ FY-ə-lyde; Greek: phialis, diminutive of phiale, a broad, flat vessel) is a flask-shaped projection from the vesicle (dilated part of the top of conidiophore) of certain fungi.
What is formed from flask shaped conidiophores?
What are the features of Penicillium?
Penicillium spp. are initially white and become blue-green, gray-green, olive-gray, yellow or pinkish with time. Multicellular fungi are composed of filaments called hyphae. Hyphae may contain internal crosswalls, called septa, that divide the hyphae into separate cells.
How are spores produced in Penicillium?
The spores (conidia) are produced in dry chains from the tips of the phialides, with the youngest spore at the base of the chain, and are nearly always green. Branching is an important feature for identifying Penicillium species.
What are the characteristics of conidiophores and phialides?
The branching of the conidiophores occurs in whorls (=verticillate; resembling spokes in a wheel from a central axis) at several levels. Conidiophores bear the phialides. Phialides are very long and are also arranged in verticils (whorls) around the conidiophore. Verticils may be disrupted in slide culture. The apices of the phialides are pointed.
Should the genus Verticillium be included in other genera?
The classification of various Verticillium species, such as Verticillium depauperatum, Verticillium rubrum and Verticillium serrae in the genus Verticillium remains doubtful and uncertain. Some authorities feel that they should be included in other genera [ 531 ].
What is the morphology of ascomycete Penicillium?
Genus/species (aliases): Penicillium expansum (Green Mold) Classification: Ascomycete. Morphology: Mono-verticillate branched septate conidiophores with sporulating cells (phialides) Cell: Ellipsoid or pyriform conidia, smooth texture Colony: Circular, smooth edges (entire margin) Malt agar: 16-34 mm diameter colony growth.
What is the shape of the apices of a phialide?
Phialides are very long and are also arranged in verticils (whorls) around the conidiophore. Verticils may be disrupted in slide culture. The apices of the phialides are pointed.