1. Two novel species isolated from wheat rhizospheres in Serbia: Pseudomonas serbica sp. nov. and Pseudomonas serboccidentalis sp. nov.
- Author
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Todorović, Irena, Abrouk, Danis, Kyselková, Martina, Lavire, Céline, Rey, Marjolaine, Raičević, Vera, Jovičić-Petrović, Jelena, Moënne-Loccoz, Yvan, and Muller, Daniel
- Subjects
MOUNTAIN soils ,PLANT growth-promoting rhizobacteria ,PSEUDOMONAS ,WHOLE genome sequencing ,SPECIES ,PLANT nutrition - Abstract
• Two Pseudomonas species are described for isolates from Serbian fields. • Phylogenetic, genomic and phenotypic analyses confirmed they were new species. • Names P. serbica (IT-P366
T ) and P. serboccidentalis (IT-P374T ) are proposed. • These two novel species possess a set of phytobeneficial genes. Pseudomonas strains IT-194P, IT-215P, IT-P366T and IT-P374T were isolated from the rhizospheres of wheat grown in soils sampled from different fields (some of them known to be disease-suppressive) located near Mionica, Serbia. Phylogenetic analysis of the 16S rRNA genes and of whole genome sequences showed that these strains belong to two potentially new species, one containing strains IT-P366T and IT-194P and clustering (whole genome analysis) next to P. umsongensis DSM16611T , and another species containing strains IT-P374T and IT-215P and clustering next to P. koreensis LMG21318T . Genome analysis confirmed the proposition of novel species, as ANI was below the threshold of 95% and dDDH below 70% for strains IT-P366T (compared with P. umsongensis DSM16611T ) and IT-P374T (compared with P. koreensis LMG21318T ). Unlike P. umsongensis DSM16611T , strains of P. serbica can grow on D-mannitol, but not on pectin, D-galacturonic acid, L-galactonic acid lactone and α-hydroxybutyric acid. In contrary to P. koreensis LMG21318T , strains of P. serboccidentalis can use sucrose, inosine and α-ketoglutaric acid (but not L-histidine) as carbon sources. Altogether, these results indicate the existence of two novel species for which we propose the names Pseudomonas serbica sp. nov., with the type strain IT-P366T (=CFBP 9060T = LMG 32732T = EML 1791T ) and Pseudomonas serboccidentalis sp. nov., with the type strain IT-P374T (=CFBP 9061T = LMG 32734T = EML 1792T ). Strains from this study presented a set of phytobeneficial functions modulating plant hormonal balance, plant nutrition and plant protection, suggesting a potential as Plant Growth-Promoting Rhizobacteria (PGPR). [ABSTRACT FROM AUTHOR]- Published
- 2023
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