Two New Species of Pseudomonas: P. oryzihabitans Isolated from Rice Paddy and Clinical Specimens and P. luteola Isolated from Clinical Specimens

Abstract

Two new Pseudomonas species which were isolated from rice paddy and clinical specimens (groups Ve-2 and Ve-1) are described. Strains of Pseudomonas oryzihabitans sp. nov. are yellow-pigmented, oxidase-negative, nonsporeforming, gram-negative, polarly monotrichously flagellated, rod-shaped organisms with deoxyribonucleic acid base compositions ranging from 63.9 to 65.6 mol% guanine plus cytosine, ubiquinone Q-9, major cellular fatty acids consisting of In the course of a study of the microflora of rice paddies, a large number of yellow-pigmented, gram-negative bacteria were isolated. Some of these organisms were identified as "Pseudomonas lacunogenes," which was studied by Goresline (7), and some characteristics of our isolates have been published previously (12). When we published the characteristics of our strains of "P. lacunogenes," the original strains which Goresline used for the description of this species and reference strains were not available from any culture collection or other sources. They are still unavailable. The strains of "P. lacunogenes" were a major component of the bacterial flora of normal rice paddies (11). However, this name is not on the Approved Lists of Bacterial Names (26). Recently, we isolated new strains similar to "P. lacunogenes" from normal rice paddies. These cultures were oxidase negative and resembled cultures that Weaver et al. (31), Tatum et al. (30), and Gilardi et al. (6) recognized as groups Ve-1 and Ve-2 of yellow-pigmented, oxidative, oxidase-negative, gram-negative, polarly flagellated, rodshaped, bacteria. Therefore, we attempted to identify our isolates from normal rice paddies by using authentic strains representative of groups Ve-1 and Ve-2.In this paper we describe two new species, Pseudomonas oryzihabitans sp. nov., which was isolated from normal rice paddies and clinical specimens (group Ve-2), and Pseudomonus luteola sp. nov., which was isolated from clinical specimens (group Ve-1). Chemical Research, Wako-shi, Saitama, Japan; NCIB, National Collection of Industrial Bacteria, Torrey Research Station, Aberdeen, United Kingdom; DNA, deoxyribonucleic acid; G+C, guanine plus cytosine; DNase, deoxyribonuclease; ONPG, o-nitrophenyl-P-galactopyranoside. The designations used for ubiquinones indicate the number of isoprene units in a side chain (e.g., ubiquinones Q-8, Q-9, and Q-10, have 8, 9, and 10 isoprene units, respectively). MATERIALS AND METHODSBacterial strains. The strains which we studied are indicated below (names which do not appear on the Approved Lists of Bacterial Names [26] are enclosed in quotation marks)., and KS0904 (= D-2 = AJ 2210) were isolated from normal rice paddies by Iizuka and Komagata (12). Strain KS0905 was isolated from Oryza sativa strain C5444 (grain harvested in 1979), strain KS0906 was isolated from 0. sativa strain C8895 (grain harvested in 1979), strain KS0907 was isolated from 0. sativa strain (28896 (grain harvested in 1979), strain KS0908 was isolated from Oryza breviligulata strain W1064 (grain harvested in 1977), strain KS09...

Cellulolytic Bacteria Associated with the Gut of Dendroctonus armandi Larvae (Coleoptera: Curculionidae: Scolytinae)

“…Bacteria of the genus Pseudomonas can be found in many different environments, including plant, animal tissue, water and soil, and they have the ability to metabolize a variety of nutrients [27]. Many Pseudomonas species are opportunistic pathogens that infect humans, animals and plants [28][29][30], but some Pseudomonas species have been reported to degrade cellulose [31,32].…”

The Phylogeny of the Genera Chryseomonas, Flavimonas, and Pseudomonas Supports Synonymy of These Three Genera

“…luteola (4) and F. oryzihabitans (4) were originally described as P. luteola and P. olyzihabitans, and the type strains were isolated from a human clinical specimen and a rice paddy, respectively (6). The transfers of P. luteola and P. oryzihabitans from the genus Pseudomonas were grounded on low levels of DNA-DNA hybridization (1 to 5%) with the other Pseudomonas species (4), although the physiological and chemotaxonomic characteristics of these organisms were similar to those of the genus Pseudomonas.…”

Emendation of Pseudomonas straminea Iizuka and Komagata 1963.

“…The distribution of these Pseudomonas species that produce water-insoluble yellow pigments is rather limited to plant materials, and their pathogenicity has not been reported (Iizuka & Komagata, 1963c ;Hildebrand et al, 1994 ;Behrendt et al, 1999). Some chemosystematic data have been reported for Pseudomonas species that produce water-insoluble yellow pigments : DNA base compositions (Kodama et al, 1985 ;Hildebrand et al, 1994 ;Behrendt et al, 1999), DNA relatedness (Hildebrand et al, 1994 ;Behrendt et al, 1999), quinone systems (Yamada et al, 1982 ;Oyaizu & Komagata, 1983 ;Behrendt et al, 1999) and cellular fatty acid compositions (Ikemoto et al, 1978 ;Oyaizu & Komagata, 1983 ;Behrendt et al, 1999). In addition, on the basis of 16S rRNA gene sequences, Pseudomonas species that produce water-insoluble yellow pigments such as P. straminea, Pseudomonas fulva, P. oryzihabitans, P. luteola, P. flavescens and P. graminis are included in group 1 of the genus Pseudomonas of Palleroni (1984) (Hildebrand et al, 1994 ;Anzai et al, 1997 ;Behrendt et al, 1999).…”