sclerotium

Thân thiện

A scientist examines a sclerotium under a bright light in the laboratory.

Definition

Noun 1. A compact, usually dark-colored mass of hardened fungal tissue: In biology, specifically mycology, a sclerotium is a dense, hardened mass of mycelium (the vegetative part of a fungus) that serves as a survival and food-storage structure. It detaches when mature and can remain dormant for long periods before giving rise to new fungal growth under favorable conditions. 2. A form genus of fungi: "Sclerotium" is also the name of a form genus comprising sterile, imperfect fungi (fungi without a known sexual reproductive stage). Many members of this genus form sclerotia, and some are plant pathogens that cause diseases.

Usage Examples

• The fungus overwinters in the soil as a hard, black sclerotium.
• The identification of a sclerotium in the plant tissue confirmed the presence of the pathogen.
• Species within the genus Sclerotium are often responsible for root and stem rot.

Advanced Usage

• Sclerotium formation: The process by which a fungus produces a sclerotium. This is a survival strategy against unfavorable environmental conditions like drought or extreme temperatures.
  • Sclerotium formation is triggered by nutrient depletion.
• Sclerotium rot: A type of plant disease characterized by the presence of sclerotia on or in the infected plant material.
  • The lettuce crop was destroyed by sclerotium rot.

Variants and Related Words

• Sclerotial (adjective): Of or relating to a sclerotium.
  • The sclerotial bodies were visible on the decaying stem.
• Sclerotinia: A related genus of fungi that also produces sclerotia and includes significant plant pathogens.
• Mycelium: The network of fungal filaments (hyphae) from which a sclerotium is formed.

Synonyms

• Resting body
• Fungal survival structure
• Dormant mass (in a mycological context)

Notes on Different Meanings

The primary and most common meaning is the first definition: the hardened, compact mass of mycelium. The second meaning, referring to the form genus, is a specialized taxonomic usage primarily encountered in scientific literature on plant pathology and mycology. In most contexts, "sclerotium" refers to the physical structure itself.

Học thuật

Noun

1. compact usually dark-colored mass of hardened mycelium constituting a vegetative food-storage body in various true fungi; detaches when mature and can give rise to new growth
2. form genus of sterile imperfect fungi; many form sclerotia; some cause sclerotium disease in plants

Từ đồng nghĩa

• Sclerotium
• genus Sclerotium