Definition

Noun: A specific type of parasitic smut fungus (genus Ustilago, particularly Ustilago striiformis) that infects cereal crops and grasses. It is characterized by causing a plant disease where spore-producing structures (sori) form in linear streaks or chains within the leaves and stems. These sori eventually rupture, releasing dark, powdery masses of spores.

Usage Examples

• Noun:
  • The wheat crop was severely damaged by flag smut fungus.
  • Researchers are studying the life cycle of the flag smut fungus to develop resistant plant varieties.
  • A key symptom of flag smut fungus infection is the appearance of long, black streaks on the leaves.

Advanced Usage

• In Plant Pathology: The term is used in technical agricultural and botanical contexts to describe both the pathogen and the disease it causes (flag smut).
  • Flag smut fungus is a significant concern for wheat producers in certain regions.

Variants and Related Words

• Flag smut (n): The name of the plant disease caused by the flag smut fungus.
  • The field showed clear signs of flag smut.
• Smut fungus (n): The broader category of fungi to which this organism belongs.
  • Smut fungi are known for transforming plant tissue into spore masses.

Synonyms

• Ustilago striiformis (n): The scientific binomial name for this specific fungus.
• Stripe smut fungus (n): An alternative common name, referring to the streaked symptoms.

Related Terms (Contextual)

• Sorus (n): A cluster of spore-producing structures. The flag smut fungus forms chains of sori.
• Teliospore (n): The thick-walled, resting spore produced by smut fungi like the flag smut fungus.

Noun

1. a smut fungus causing a smut in cereals and other grasses that chiefly affects leaves and stems and is characterized chains of sori within the plant tissue that later rupture releasing black masses of spores