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Agromyces ulmi sp. nov., a xylanolytic bacterium isolated from Ulmus nigra in Spain

Departamento de Microbiología y Genética, Edificio Departamental, Campus Miguel de Unamuno, Universidad de Salamanca, Spain

Correspondence
Martha E. Trujillo
mett{at}usal.es

Two xylan-degrading bacterial strains were isolated from a decayed Ulmus nigra tree in Spain. The isolates were Gram-positive, non-motile, aerobic and formed substrate mycelium which fragmented into irregular rods. 16S rRNA gene sequence analysis indicated that the isolates form a separate branch within the genus Agromyces phylogenetic cluster, with Agromyces mediolanus DSM 20152^T being their closest relative (97·7 and 97·6 % sequence similarity). Catalase, nitrate reduction and urease tests differentiated these strains from A. mediolanus. Cell-wall peptidoglycan composition, major menaquinone, predominant fatty acids and phospholipid pattern were typical of the genus Agromyces. The DNA G+C content determined for the type strain XIL01^T was 72 mol%. Based on the data presented, a novel species Agromyces ulmi sp. nov. is proposed. The type strain is XIL01^T (=LMG 21954^T=DSM 15747^T).

Published online ahead of print on 23 April 2004 as DOI 10.1099/ijs.0.63058-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequence of strains XIL01^T and XIL05 are AY427830 and AY427831, respectively.

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