Frankiaceae Becking 1970 (Approved Lists 1980)
General information
Description and emendation
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1: Hyphae are extensive. Aerial mycelium is absent. The hyphal diameter varies from 0.5 to 2.0 μm. Branching is limited to extensive. The mycelium may bear terminal or lateral thickwalled diazovesicles. A part of the thallus is composed of irregularly shaped cuboid to oval cells that divide in more than one plane. These cells are nonmotile, possess an outer membrane, and may germinate to give filaments. Gram positive to gram variable. Aerobic to microaerophilic. The nitrogen sources used are amino acids and ammonia; atmospheric nitrogen is fixed in vivo and in vitro by most strains. The carbon sources used include carbohydrates, organic acids, and fatty acids. Found in soil and as symbionts of higher plants. The cell wall type is type III (meso-diaminopimelic acid, glutamic acid, alanine, glucosamine, and muramic acid). The whole-cell sugar patterns include patterns B (3-O-methyl-D-galactosem, adurose), D (xylose), and E (fucose). 2-O-Methyl-D-mannoseis a diagnostic sugar. Phospholipid pattern PI. The major mena-quinone is MK-9(H4). Fatty acid pattern 1. All strains tested contain hopanoid lipids (25a). The family comprises the single genus Frankia.
2: The 16S rDNA signature nucleotide pattern consists of 139-224 (G-C), 148-174(A-G), 155-166(U-G), 839-847 (A-G), 987-1218 (G-C), 1059-1198 (C-G), and 1308-1329 (C-G). The family contains the type genus Frankia.
3: The pattern of 16S rRNA signatures consists of nucleotides at positions 184:193 (A-C), 195 (A), 196 (U), 582:758 (U-A), 601:637 (G-U), 602:636 (C-G), 841 (C), 952:1229 (U-A), 986:1219 (A-U), 1059:1198 (C-G) and 1308:1329 (C-G). The family contains the type genus Frankia.
Subdivision(s)
MID | Name | Rank | Taxon ID |
---|---|---|---|
M020202070101 | Frankia | Genus | 1854 |