aFor symbols see standard definitions.

Ol carbon and nitrogen. Among the nine fatty acids that predominate in whole cell preparations are 9-methyl decanoic acid (C11:0iso), 3-hydroxy-9-methyl decanoic acid (C11:0iso3OH), and 3-hydroxy-11-methyl dodecanoic acid (C13:0 iso 3OH), which are highly characteristic of this genus. The ubiquinone that is present has eight isoprene units. Spermidine is the main polyamine; spermine is usually detectable, but not 2-hydroxyputrescine or 1,3-diaminopropane. Species so far described are plant pathogens or are plant associated.

Type species: Xanthomonas campestris (Pammel 1895) Dowson 1939, 190, emend. Vauterin Hoste, Kersters and Swings 1995, 484 ( "Bacillus campestris" Pammel 1895, 130.)

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