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Frankia asymbiotica sp. Nov., a non-infective actinobacterium isolated from Morella californica root nodule

Lookup NU author(s): Dr Imen Nouioui, Emeritus Professor Hans-Peter Klenk

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Abstract

© 2017 IUMS. The taxonomic status of strain M16386T, a nitrogen-fixing but non-nodulating isolate from Morella californica, was established on the basis of a polyphasic approach. The strain grows as branched hyphae, with vesicles and non-motile productive multilocular sporangia. It metabolizes short fatty acids, TCA cycle intermediates and carbohydrates as carbon sources, and fixes nitrogen in the absence of combined nitrogen source in the growth media. Chemotaxonomic traits of strain M16386T are consistent with its affiliation to the genus Frankia. The characteristic diamino acid in the cell wall is meso-diaminopimelic acid. Strain M16386T contains phosphatidylinositol, phosphatidylglycerol, diphosphatidylglycerol, glycophospholipid and phospholipid as polar lipids; MK-9(H4) and MK-9(H6) as the predominant menaquinones; iso-C16: 0 and C17: 1ω8c as major fatty acids; and galactose, glucose, mannose, rhamnose and ribose as whole-cell sugars. Strain M16386T showed 98.2% 16S rRNA gene sequence similarity with its closest phylogenetic neighbour, Frankia inefficax DSM 45817T. Based on these results, strain M16386T (=DSM 100626T=CECT 9040T) is designated the type strain of a novel species of the genus Frankia, for which the name Frankia asymbiotica sp. nov. is proposed.


Publication metadata

Author(s): Nouioui I, Gueddou A, Ghodhbane-Gtari F, Rhode M, Gtari M, Klenk H-P

Publication type: Article

Publication status: Published

Journal: International Journal of Systematic and Evolutionary Microbiology

Year: 2017

Volume: 67

Issue: 12

Pages: 4897-4901

Print publication date: 01/12/2017

Acceptance date: 11/06/2017

ISSN (print): 1466-5026

ISSN (electronic): 1466-5034

Publisher: Microbiology Society

URL: https://doi.org/10.1099/ijsem.0.002153

DOI: 10.1099/ijsem.0.002153

PubMed id: 28918775


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