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Conidia on conidiophores Chain of conidia of Alternaria Conidiomata of Cypress canker (probably Seiridium cardinale) erupting on a Thuja twig. A conidium (/ k ə ˈ n ɪ d i ə m, k oʊ-/ kə-NID-ee-əm, koh-; pl.: conidia), sometimes termed an asexual chlamydospore or chlamydoconidium (pl.: chlamydoconidia), [1] is an asexual, [2] non-motile spore of a fungus.
In fungi, both asexual and sexual spores or sporangiospores of many fungal species are actively dispersed by forcible ejection from their reproductive structures. This ejection ensures exit of the spores from the reproductive structures as well as travelling through the air over long distances.
A sporangium (from Late Latin, from Ancient Greek σπορά (sporá) 'seed' and ἀγγεῖον (angeîon) 'vessel'); pl.: sporangia) [1] is an enclosure in which spores are formed. [2]
Sporangiospores. Sporangiospores (spore:spore, angion:sac) are spores formed inside the sporangium which is a spore sac. Conidia. Conidia (singular: conidium) are spores produced at the tip of special branches called conidiophores. Oidia. Oidia (singular: oidium).
The asexual, non-motile haploid spores of a fungus, which are named after the Greek word for dust (conia), are hence also known as conidiospores. The conidiospores commonly contain one nucleus and are products of mitotic cell divisions and thus are sometimes called mitospores , which are genetically identical to the mycelium from which they ...
Mucor spores or sporangiospores can be simple or branched and form apical, globular sporangia that are supported and elevated by a column-shaped columella. Mucor species can be differentiated from molds of the genera Absidia , Rhizomucor , and Rhizopus by the shape and insertion of the columella, and the lack of stolons and rhizoids .
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The sporangiospores germinate to form the haploid hyphae of a new mycelium. Asexual reproduction often occurs continuously. In heterothallic species, sexual reproduction occurs when opposite mating types (designated + and -) come into close proximity, inducing the formation of specialized hyphae called gametangia .
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