Lesson plan
Pycnidium
species releasing conidia Pycnidium (plural pycnidia) is a type of conidioma, or asexual reproductive structure, found in many fungi, especially ascomycetes. It is typically globose to flask-shaped and contains spores (conidia) produced within an internal cavity. In many pycnidia the spores are released through a small opening called an ostiole. Pycnidia are defined by their shape rather than by evolutionary relationships. Fungi producing pycnidia were historically grouped among the Coelomycetes or fungi imperfecti, but those form-groups are no longer treated as natural taxa in modern classification and nomenclature. In plant pathology, conidia formed in pycnidia are often called pycnidiospores. Pycnidia are diagnostically important in plant pathology and clinical mycology, and in lichenised fungi they may produce conidia with either dispersal or gametic functions.
Article summary
species releasing conidia Pycnidium (plural pycnidia) is a type of conidioma, or asexual reproductive structure, found in many fungi, especially ascomycetes. It is typically globose to flask-shaped and contains spores (conidia) produced within an internal cavity. In many pycnidia the spores are released through a small opening called an ostiole. Pycnidia are defined by their shape rather than by evolutionary relationships. Fungi producing pycnidia were historically grouped among the Coelomycetes or fungi imperfecti, but those form-groups are no longer treated as natural taxa in modern classification and nomenclature. In plant pathology, conidia formed in pycnidia are often called pycnidiospores. Pycnidia are diagnostically important in plant pathology and clinical mycology, and in lichenised fungi they may produce conidia with either dispersal or gametic functions.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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