cleistothecium
Definition
Noun: A cleistothecium is a closed, spherical fruiting body (ascocarp) produced by certain fungi, particularly within the families Aspergillaceae and Erysiphaceae (which includes powdery mildew fungi). It is a protective structure that contains sexual spores (ascospores). Unlike other fungal fruiting bodies, the cleistothecium does not have a natural opening (ostiole); the spores are only released when the outer wall decays, disintegrates, or is broken open.
Examples of Usage
- The fungus overwinters as a cleistothecium on fallen leaves.
- Under the microscope, the cleistothecium appeared as a dark, round structure.
- Identification of the species relied on examining the appendages on the cleistothecium.
Advanced Usage
- In a taxonomic/scientific context: The morphology of the cleistothecium—including its size, wall structure, and the nature of its appendages—is a critical diagnostic feature for classifying fungi in the order Eurotiales and Erysiphales.
- Example: The presence of hooked appendages on the cleistothecium is characteristic of the genus Aspergillus.
Variants and Related Words
- Cleistocarp: This is a synonymous term for cleistothecium, often used interchangeably in mycology.
- Ascocarp: This is the general term for the fruiting body of an ascomycete fungus that contains ascospores. A cleistothecium is a specific, closed type of ascocarp.
- Perithecium: Another type of ascocarp, but one that has a small opening (ostiole) for spore release, unlike a closed cleistothecium.
Synonyms
- Cleistocarp
Related Terms (Not Phrasal Verbs or Idioms)
- Ascospore: The sexual spore produced inside the cleistothecium.
- Ascomycete: The phylum of fungi (Ascomycota) to which organisms forming cleistothecia belong.
- Powdery Mildew: A common plant pathogen (family Erysiphaceae) that often produces cleistothecia as its overwintering structure.
Noun
-
closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration
Khám phá thêm
Các từ liên quan
Từ đồng nghĩa
Từ có nhắc đến "cleistothecium"
