apothecium

/,æpə'θiʃiəm/

Thân thiện

A lichen on a tree branch displays a small, open apothecium.

Definition

Noun: - A cup-shaped or disk-shaped fruiting body (ascocarp) in certain fungi, particularly in many lichens and ascomycetous fungi: It is a structure that contains and releases spores (ascospores) produced within sac-like cells called asci.

Usage

The term "apothecium" is a specialized biological term used in mycology (the study of fungi) and lichenology. It describes a specific type of reproductive structure. It is typically used in scientific writing, academic texts, and field guides.

Examples

• Under the microscope, the lichen's apothecium revealed rows of asci containing mature spores.
• The presence of a distinct, cup-shaped apothecium helps identify this species of fungus.
• In some lichens, the apothecium is brightly colored, contrasting with the main body (thallus).

Advanced Usage

• "Apothecial" (adjective): Relating to or resembling an apothecium.
  • The apothecial margin was clearly visible.
• The plural form is apothecia.

Variants and Related Words

• Ascocarp: The general term for the fruiting body of an ascomycete fungus, of which an apothecium is one type. Other types include perithecia and cleistothecia.
• Ascomycete: A member of the phylum Ascomycota, a large group of fungi characterized by producing spores in an ascus.
• Lichen: A symbiotic organism composed of a fungus (usually an ascomycete) and an alga or cyanobacterium. The fungal partner often produces apothecia.

Synonyms

• Fruiting body (a more general term for a spore-producing structure in fungi).
• Ascocarp (the specific category of fruiting body in ascomycetes).

Notes on Different Meanings

The word "apothecium" has a single, highly specific meaning in biology. It does not have common idiomatic or figurative uses. Its usage is confined to scientific contexts describing fungal and lichen anatomy.

Học thuật

Noun

1. a cuplike ascocarp in many lichens and ascomycetous fungi