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Characterization of a coryneform isolate from fasciated mugwort (Artemisia vulgaris).

M N G Battikhi1

  • 1Hashemite University, Faculty of Allied Health Sciences, Department of Medical Laboratory Sciences, Zarqa, Jordan.

The New Microbiologica
|May 22, 2002
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Summary
This summary is machine-generated.

A novel coryneform bacterium isolated from mugwort causes plant fasciation. This plant pathogen shares traits with Corynebacterium species but exhibits unique biochemical characteristics, suggesting a potential new classification.

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Area of Science:

  • Plant pathology
  • Microbiology
  • Bacteriology

Background:

  • Fasciation in plants, such as mugwort (Artemisia vulgaris), can be caused by bacterial pathogens.
  • Coryneform bacteria, including plant pathogenic species like Corynebacterium fascians, are known to induce plant diseases.

Purpose of the Study:

  • To characterize a coryneform bacterium isolated from fasciated mugwort.
  • To compare the isolate's morphological and physiological features with known plant pathogenic corynebacteria.
  • To determine the taxonomic relationship of the isolate to existing bacterial genera.

Main Methods:

  • Morphological analysis of the isolated bacterium.
  • Physiological and biochemical testing, including motility, esculin hydrolysis, urease production, and pigmentation analysis.
  • Comparison of isolate characteristics with established species like Corynebacterium fascians, Corynebacterium poinsettiae, and Curtobacterium flaccumfaciens.

Main Results:

  • The mugwort isolate exhibited morphological similarities to plant pathogenic corynebacteria.
  • The isolate displayed motility in a small cell proportion, hydrolyzed esculin, did not produce urease, and showed distinct pigmentation.
  • While causing fasciation, the isolate's biochemical profile resembled Corynebacterium poinsettiae and Curtobacterium flaccumfaciens.

Conclusions:

  • The isolated coryneform bacterium is related to Corynebacterium fascians due to its ability to induce fasciation.
  • Physiological and biochemical differences suggest the isolate may represent a distinct species or genus.
  • The findings support the reclassification of Corynebacterium poinsettiae and Curtobacterium flaccumfaciens, highlighting the complexity of coryneform taxonomy.