FungiDB NTR: Conidiation

[Achchuthan]

NTR

1. conidiation phenotype (is_a: OMP:0007142 ! asexual sporulation phenotype) Xref: GO:0048315 " conidium formation"

APO cross-reference: id: APO:0000295 name: conidiation namespace: observable def: "The formation of conidia, which are asexual spores." [AspGD:mcc] subset: AspGD is_a: APO:0000023 ! development

FAO cross-reference: id: FAO:0000024 name: conidium def: "An asexual, nonmotile spore formed by higher fungi; conidia are usually made from the side or tip of specialized sporogenous cells and do not form by progressive cleavage of the cytoplasm." [PMID:2524423, PMID:9529886, SGD:clt] is_a: FAO:0000023 ! asexual spore

2. presence of conidiation (is_a conidiation phenotype)
3. absence of conidiation (is_a conidiation phenotype)
4. altered conidiation (is_a conidiation phenotype)
5. increased conidiation (is_a altered conidiation)
6. decreased conidiation (is_a altered conidiation)
7. abolished conidiation (is_a decreased conidiation)

[dsiegele]

Please review the definitions for the terms requested. If they are OK, we'll add the terms to OMP

conidiation phenotype (is_a asexual sporulation phenotype): An asexual sporulation phenotype relating to the formation of a conidium, which is a nonmotile spore formed by higher fungi; conidia are usually made from the side or tip of specialized sporogenous cells and do not form by progressive cleavage of the cytoplasm. Include a Dbxref to FAO FAO:0000024 Xref conidium formation GO:0048315

presence of conidiation (is_a conidiation phenotype) def: A conidiation phenotype where a microbe is capable of forming conidia.

absence of conidiation (is_a conidiation phenotype) def: A conidiation phenotype where a microbe cannot form conidia.

altered conidiation (is_a conidiation phenotype) def: A conidiation phenotype where the rate, frequency, timing, or extent of conidiation is altered relative to a designated control.

 increased conidiation (is_a altered conidiation) def: An altered conidiation phenotype where the rate, frequency, timing, or extent of conidiation is increased relative to a designated control.

 decreased conidiation (is_a altered conidiation)  def: An altered conidiation phenotype where the rate, frequency, timing, or extent of conidiation is increased relative to a designated control.

      decreased frequency of conidiation (is_a decreased conidiation): A decreased conidiation phenotype where the number of conidia produced per vegetative biomass is decreased relative to a designated control.

      abolished conidiation (is_a decreased conidiation) def: A decreased conidiation phenotype where conidiation is abolished.

[Achchuthan]

That's Brilliant! The definitions are fine with me and happy for them to be added!! Thanks a lot.

[dianeoinglis]

Hi, there are actually quite a few problems with the term definition for 'conidiation." First, the definition from the APO is incorrect although that APO xref should be used. Conidiation involves a whole lot more than the formation of conidia. Conidia are produced by sporogenous cells that form after a vegetatively growing mycelium reaches a state of developmental/reproductive competence. The first step in conidiation is to begin producing conidiophores. The conidiophores must then develop and the final step in contidiation is conidium formation from the sporogenous cells of the conidiophore. The part about successive cleavage can be omitted as it may not always be true.

It's incorrect to say that a microbe is capable of forming contidia. I've noticed this concept is stated as the microbial species is capable of forming contidia which is scientifically and technically correct. Contidiation is only possible with a population of microbes.

The frequency of contidiation terms are quite confusing. Neurospora conidiates on a circadium rhythm and an increased rate/frequency would be twice a day, for example. The measure per vegetative mass also has the issue of whether a given amount of veg cell mass makes one conidiophore with 100 conidia is increased or decreased if the control makes 2 conidiophores with 50 contidia each. Murky! I think the frequency term can be omitted.

Note that conidium formation should be a separate term request as a phenotype could be barren conidiophores, for example . Please refer specifically to GO:0048315 'conidium formation' and GO:0061794 'conidium develoment,' their relationships and synonyms. Thanks, Diane