order pseudomonadales

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order pseudomonadales

A scientist examines a slide of order Pseudomonadales under a microscope.

Definition

Noun: 1. A taxonomic order of bacteria: "Order Pseudomonadales" is a scientific classification in biology, specifically in bacteriology. It refers to one of two traditionally recognized orders within the group of "true bacteria" (Eubacteria). Organisms in this order are characterized as Gram-negative and can have spiral (spirilla), spherical (cocci), or rod-shaped (bacilli) forms. They are typically capable of movement via polar flagella. Some members of this order contain photosynthetic pigments.

Usage Notes
  • This term is highly specialized and used almost exclusively in scientific contexts, particularly in microbiology, taxonomy, and related research fields.
  • It is a proper noun in scientific nomenclature and is often capitalized: .
  • In modern taxonomic revisions, this specific order name may be subject to change as genetic analysis refines bacterial classification.
Examples
  • Scientific Context:
    • The bacterium Pseudomonas aeruginosa is classified within the order Pseudomonadales.
    • Researchers studied the evolutionary relationships among families in the order Pseudomonadales.
    • Some photosynthetic bacteria found in aquatic environments belong to the order Pseudomonadales.
Advanced Usage
  • The order Pseudomonadales is part of the larger class Gammaproteobacteria.
  • The definition mentions it is "one of two usually recognized orders," with the other historically being Order Eubacteriales (or a similar grouping), highlighting a traditional dichotomous view of bacterial classification.
Variants and Related Words
  • Pseudomonad (noun): A common, informal term for any bacterium belonging to the order Pseudomonadales, especially those in the genus .
    • The infection was caused by a resistant pseudomonad.
  • Pseudomonadaceae (noun): The name of a prominent family within the order Pseudomonadales.
Synonyms
  • Scientific Synonym: In some older or alternative classification systems, the group may be referred to by different taxonomic names. There is no simple, common-language synonym for this precise scientific term.
Related Phrases / Contexts
  • Gram-negative bacteria: A key descriptive characteristic of this order.
  • Polar flagella: A structural feature typical of motility in this order.
  • Photosynthetic pigments: A property found in some members, like certain species.
order pseudomonadales

A scientist examines a slide of order Pseudomonadales under a microscope.

Noun
  1. one of two usually recognized orders of true bacteria; Gram-negative spiral or spherical or rod-shaped bacteria usually motile by polar flagella; some contain photosynthetic pigments

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