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Pseudoalteromonas rhizosphaerae Sp. Nov. , a novel plant growth-promoting bacterium with potential use in phytoremediation

AuthorsNavarro-Torre, Salvadora; Carro, Lorena ; Rodríguez-Llorente, Ignacio D.; Pajuelo, Eloísa; Caviedes, Miguel Ángel; Igual, José Mariano ; Klenk, Hans Peter; Montero-Calasanz, Maria del Carmen
KeywordsArthrocnemum macrostachyum
Heavy metals
Odiel marshes
Nitrogen fixation
Issue Date2020
PublisherMicrobiology Society
CitationInternational Journal of Systematic and Evolutionary Microbiology 70 (5): 3287-3294 (2020)
AbstractStrain RA15T was isolated from the rhizosphere of the halophyte plant Arthrocnemum macrostachyum growing in the Odiel marshes (Huelva, Spain). RA15T cells were Gram stain-negative, non-spore-forming, aerobic rods and formed cream-coloured, opaque, mucoid, viscous, convex, irregular colonies with an undulate margin. Optimal growth conditions were observed on tryptic soy agar (TSA) plates supplemented with 2.5 % NaCl (w/v) at pH 7.0 and 28 °C, although it was able to grow at 4–32 °C and at pH values of 5.0–9.0. The NaCl tolerance range was from 0 to 15 %. The major respiratory quinone was Q8 but Q9 was also present. The most abundant fatty acids were summed feature 3 (C16 : 1  ω7c and/or C16 : 1  ω6c), C17 : 1  ω8c and C16 : 0. The polar lipids profile comprised phosphatidylglycerol and phosphatidylethanolamine as the most abundant representatives. Phylogenetic analyses confirmed the well-supported affiliation of strain RA15T within the genus Pseudoalteromonas , close to the type strains of Pseudoalteromonas neustonica , Pseudoalteromonas prydzensis and Pseudoalteromonas mariniglutinosa . Results of comparative phylogenetic and phenotypic studies between strain RA15T and its closest related species suggest that RA15T could be a new representative of the genus Pseudoalteromonas , for which the name Pseudoalteromonas rhizosphaerae sp. nov. is proposed. The type strain is RA15T (=CECT 9079T=LMG 29860T). The whole genome has 5.3 Mb and the G+C content is 40.4 mol%.
Description17 páginas, 2 figuras, 3 tablas
Publisher version (URL)http://dx.doi.org/10.1099/ijsem.0.004167
Appears in Collections:(IRNASA) Artículos
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