Nocardiopsis halophila sp. nov., a New Halophilic Actinomycete Isolated from Soil

Abstract

A new species, Nocardiopsis hubphila, is proposed. This species is represented by a single isolate obtained from a saline soil sample in Iraq. This organism grows in both synthetic and organic media containing concentrations of NaCl up to 20% (wt/vol) and is resistant to lysozyme. Whole-cell hydrolysates contain meso-diaminopimelic acid (cell wall type 111) and no diagnostic sugars (sugar pattern C). The phospholipid type is type PIII. The predominant menaquinone is MK-lO(H,,H,), and mycolic acids are absent. This organism forms abundant white aerial mycelia and long irregularly branched spore chains that have a zigzag appearance and fragment into spores of various lengths. The substrate mycelia are extensively branched and are rarely fragmented. These properties suggest that this bacterium should be placed in the genus Nocardiopsis. However, this organism differs from all previously described species of the genus Nocardiopsis in its ability to grow in the presence of 20% (wt/vol) NaCl and also in many other physiological and biochemical characteristics. Thus, we propose that this organism is a new species, Nocardiopsis halophila. Type strain IQ-H3 has been deposited in the Culture Collection

Nocardiopsis xinjiangensis sp. nov., a halophilic actinomycete isolated from a saline soil sample in China

“…At the time of writing, there were 15 validly described species of the genus Nocardiopsis (Al-Tai & Ruan, 1994;Kroppenstedt, 1992;Yassin et al, 1993Yassin et al, , 1997Evtushenko et al, 2000;Chun et al, 2000;Peltola et al, 2001;Al-Zarban et al, 2002). Of these species, only Nocardiopsis halophila and Nocardiopsis kunsanensis are halophilic actinomycetes.…”

Streptimonospora salina gen. nov., sp. nov., a new member of the family Nocardiopsaceae.

“…alba, Nocardiopsis alba subsp. prasina and Nocardiopsis synnemataformans (Meyer, 1976 ;Grund & Kroppenstedt, 1990 ;Abyzov et al, 1983 ;Yassin et al, 1993Yassin et al, , 1997Al-Tai & Ruan, 1994 ;Miyashita et al, 1984). The subspecies N. alba subsp.…”

Haloactinospora alba gen. nov., sp. nov., a halophilic filamentous actinomycete of the family Nocardiopsaceae

“…With the exception of the genus Thermobifida, most strains of the family Nocardiopsaceae have been isolated from saline soils, and some of them are strictly halophilic filamentous actinomycetes. At present, the genus Nocardiopsis contains 24 species with validly published names, some of which have been isolated from hypersaline soils (Al-Tai & Ruan, 1994;Al-Zarban et al, 2002;Li et al, 2003aLi et al, , 2006, and the genus Streptomonospora contains two species (Cui et al, 2001;Li et al, 2003b), both of which are halophilic filamentous actinomycetes.…”