Definition

Noun: 1. A genus of bacteria: A taxonomic category (genus) of Gram-negative bacteria. These bacteria are rod-shaped and motile, possessing polar flagella. A key distinguishing characteristic is their production of a yellow, non-water-soluble pigment.

Usage Notes

• The word is a scientific, taxonomic term used primarily in microbiology, plant pathology, and related biological sciences.
• It is always treated as a singular noun, even though it refers to a group containing many species (e.g., "The genus Xanthomonas is known for...").
• The name is often italicized in formal scientific writing, as is standard for genus and species names.

Examples of Usage

• Scientific Context:
  • The plant disease was confirmed to be caused by a pathogen from the genus Xanthomonas.
  • Researchers are studying the genome of Xanthomonas to understand its virulence mechanisms.
  • Several species within genus Xanthomonas are of major economic importance due to the crop diseases they cause.

Advanced Usage

• The genus name can be used attributively (like an adjective) to describe related nouns.
  • Example: The Xanthomonas infection spread rapidly through the field.

Variants and Related Words

• Xanthomonad (n): A common name for any bacterium belonging to the genus or the family .
  • Example: The isolated xanthomonad was tested for antibiotic resistance.
• Xanthomonadal (adj): Relating to or characteristic of the genus .
  • Example: The xanthomonadal pigment is a key diagnostic feature.

Synonyms

• None precise: In formal taxonomy, genus names are unique identifiers and do not have true synonyms. In general descriptive language, one might use phrases like:
  • "yellow-pigmented bacteria" (though this is less specific, as other genera also produce yellow pigments).

Different Meanings

• This term has a single, specific meaning in scientific nomenclature. It does not have common, everyday definitions outside of microbiology.

Related Phrases / Contexts

• Xanthomonas campestris: A well-known species within the genus, causing black rot in cruciferous vegetables.
• Xanthomonas axonopodis: A species complex containing many pathogens affecting diverse crops.
• Bacterial spot/blight: Common names for diseases caused by various species.

Noun

1. a genus of bacteria similar to Pseudomonas but producing a yellow pigment that is not soluble in water