| Autor: |
Ormerod JG; Department of Biology, University of Oslo, Norway., Kimble LK, Nesbakken T, Torgersen YA, Woese CR, Madigan MT |
| Jazyk: |
angličtina |
| Zdroj: |
Archives of microbiology [Arch Microbiol] 1996 Apr; Vol. 165 (4), pp. 226-34. |
| DOI: |
10.1007/s002030050320 |
| Abstrakt: |
Two new taxa of phototrophic heliobacteria are described: Heliobacterium gestii sp. nov. and Heliophilum fasciatum gen. nov. sp. nov. Both organisms were isolated from dry paddy soils. Cells of H. gestii were motile spirilla; cells of H. fasciatum formed cell bundles that were motile as units. Both organisms produced endospores; H. gestii endospores contained dipicolinic acid and elevated levels of calcium. As with other heliobacteria, bacteriochlorophyll g was produced in both organisms and no intracytoplasmic photosynthetic membranes were observed. Growth of H. gestii and H. fasciatum occurred under both photoheterotrophic and chemotrophic conditions; nitrogen fixation also occurred in both organisms. H. gestii and H. fasciatium showed a phylogenetic relationship to the "low GC" line of gram-positive Bacteria, but H. fasciatum was distinct from H. gestii and all other heliobacteria. The ability of H. gestii and H. fasciatum to form endospores might be a significant ecological advantage for survival in their rice soil habitat. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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