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Int J Syst Evol Microbiol 59 (2009), 1451-1454; DOI  10.1099/ijs.0.007138-0
© 2009 International Union of Microbiological Societies

Mucilaginibacter oryzae sp. nov., isolated from soil of a rice paddy

Yeji Jeon1,{dagger}, Sang-Suk Lee2,{dagger}, Bok Sil Chung3, Jeong Myeong Kim3, Jin-Woo Bae4, Soo Kwon Park1 and Che Ok Jeon3

1 Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea
2 Department of Animal Science & Technology, Sunchon National University, Sunchon 540-742, Republic of Korea
3 Department of Life Science, Chung-Ang University, Seoul 156-756, Republic of Korea
4 Biological Resource Center, KRIBB, Daejeon 305-806, Republic of Korea

Correspondence
Che Ok Jeon
cojeon{at}cau.ac.kr

A Gram-negative-staining, non-spore-forming bacterium devoid of flagella, designated strain B9T, was isolated from rice paddy soil associated with the roots of Oryza sativa collected from Jinju, South Korea. Cells were straight rods, were catalase- and oxidase-positive and were able to hydrolyse pectin, xylan and laminarin. Growth of strain B9T was observed between 15 and 35 °C (optimum 25–30 °C) and between pH 5.0 and 8.0 (optimum pH 6.5–7.5). Strain B9T contained menaquinone-7 (MK-7) as a major isoprenoid quinone and summed feature 3 (C16 : 1{omega}7c and/or iso-C15 : 0 2-OH), iso-C15 : 0 and C16 : 0 as major fatty acids. The G+C content of the genomic DNA was 44.4 mol%. Comparative 16S rRNA gene sequence analysis showed that strain B9T belonged to the genus Mucilaginibacter, a member of the family Sphingobacteriaceae, and was most closely related to Mucilaginibacter kameinonensis SCKT (95.9 % sequence similarity). On the basis of chemotaxonomic data and molecular properties, strain B9T represents a novel species of the genus Mucilaginibacter, for which the name Mucilaginibacter oryzae sp. nov. is proposed. The type strain is B9T (=KACC 12816T =DSM 19975T).

{dagger}These authors contributed equally to this work.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain B9T is EU109722.

A transmission electron micrograph of cells of strain B9T is available as supplementary material with the online version of this paper.






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