Ecological studies on coccoid bacteria in a pine forest soil—I. Classification

Lowe, W.E.; Gray, T. R. G.

doi:10.1016/0038-0717(72)90061-2

Cited by 25 publications

(10 citation statements)

References 14 publications

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“…Clearly, future studies on leaf surface bacteria should include good representatives of the genera Acinetobacter, Corynebacterium, Curtobacterium, Flexibacter, Listeria, Micrococcus, Pseudomonas, Staphylococcus, Xanthomonas and of less well established taxa containing yellow chromogens (Goodfellow et al, 19763). Phena which do not contain marker strains are often identified using conventional keys (Pfister & Burkholder, 1965;Lowe & Gray, 1972); however, this expedient can be of limited value, as in the present study, for distinct phena can be keyed out to the same taxon. These difficulties emphasize that natural habitats may contain bacteria that previously either went unrecognized or were 'dumped' into heterogeneous groups after a cursory examination of a few ' important' characters.…”

Section: Temporal Distribution Of the Isolatesmentioning

confidence: 95%

“…Pigmentation may confer resistance to ultraviolet radiation in sunlight (Mathews & Sistrom, 1960) or desiccation (Grinstead & Lacey, 1973). By contrast the soil flora generally includes large populations of Gram-positive, non-chromogenic bacteria classified as Arthrobacter, Bacillus and Streptomyces (Stout, 1960;Goodfellow, 1969;Jensen, 1971 ;Holm & Jensen, 1972;Lowe & Gray, 1972) though Gram-negative bacteria are common in some grassland soils (Stout, 1961) and in the rhizosphere (Rovira & Brisbane, 1967 Little is known of the significance of this bacterial flora to the plant or to other indigenous leaf surface micro-organisms. However, the numerical classification of the bacterial flora of Lolium perenne leaves has made it possible to select strains objectively for interaction studies.…”

Section: Temporal Distribution Of the Isolatesmentioning

confidence: 99%

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Numerical Taxonomy of Phylloplane Bacteria Isolated from Lolium perenne

Austin

Goodfellow

Dickinson³

1978

Journal of General Microbiology

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I39Phenetic data on over 600 heterotrophic bacteria from green leaves of Lolium perenne s24 were collected and analysed using numerical taxonomic methods. Marker strains representing 60 taxa were included in the analyses. At similarity levels of 80 % or above, 74 % of the isolates were recovered in six major and 45 minor phena. Four of the major phena were equated with the taxa Listeria grayilmurrayi, PseudomonasJiTuorescens, Staphylococcus saprophyticuJ and Xanthomonas campestris; the two unidentified phena contained pink, Gram-negative rods with polar flagella. Xanthomonads and pink chromogens formed high populations in May, xanthomonads and pseudomonads in July, xanthomonads in September and listeriae and staphylococci in October. It seems that despite the spatial proximity of leaves, litter and soil, each of these habitats contains independent bacterial communities with specific properties.

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Section: Temporal Distribution Of the Isolatesmentioning

confidence: 95%

Section: Temporal Distribution Of the Isolatesmentioning

confidence: 99%

Numerical Taxonomy of Phylloplane Bacteria Isolated from Lolium perenne

Austin

Goodfellow

Dickinson³

1978

Journal of General Microbiology

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“…They are found in most soil types and may constitute 20 to 50%) of the isolatable colonies (Conn, 1948;Gounot, 1967;Lowe & Gray, 1972;Mulder & Antheunisse, 1963;Wiland, 1969). The coryneform bacteria are thought to be related to the actinomycetes (Jensen, 1966) but they do not form spores or other structures which could be considered as environmentally resistant resting structures.…”

Section: Introductionmentioning

confidence: 99%

The Survival of Coryneform Bacteria during Periods of Prolonged Nutrient Starvation

Boylen

Mulks

1978

Journal of General Microbiology

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Cultures of 16 coryneform bacteria were grown to late-exponential stage in nutrient media, washed, and starved in 30 mwpotassium phosphate buffer pH 7.0, with no external energy or carbon source. After 4 weeks starvation, 20 to 98 yo of each culture was still viable; after 8 weeks, 5 to 70% of each culture was still viable. Little change in cell shape or size was detected in Arthrobacter globiformis, A . nicotianae, Brevibacterium linens, Corynebacterium fascians, Mycobacterium rhodochrous and Nocardia roseum when studied by electron microscopy for up to 56 d, although there was a gradual disappearance of intracellular material. No resting structures were discernible. All organisms showed an immediate decrease in endogenous respiration to less than 1 of that observed during growth. A low basal level of endogenous metabolism equivalent to 0.01 to 0.03 % of cellular carbon oxidized to C 0 2 h-l was maintained for 56 d. Carbohydrate, intracellular pools, protein, ribonucleic acid and deoxyribonucleic acid were utilized at varying rates by different organisms during this period. All species were effective in maintaining 20 to 70% of their Mg2+ content during a 28 d starvation period in the absence of any external Mg2+. It would appear that the soil coryneform bacteria possess similar survival characteristics in laboratory studies which could explain, in part, their ecological success in natural environments.

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“…FB12 was identified as Arthrobacter sp. This bacterial group accounts for a considerable proportion of the strains isolated from soil [16][17][18][19]. Their morphology characterized by the rod-to-coccoid transition is markedly dependent on the growth medium.…”

Section: Resultsmentioning

confidence: 99%

Generation of hydroxyl analogous radicals by Arthrobacter sp.

Blondeau¹

1987

FEMS Microbiology Letters

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Ecological studies on coccoid bacteria in a pine forest soil—I. Classification

Cited by 25 publications

References 14 publications

Numerical Taxonomy of Phylloplane Bacteria Isolated from Lolium perenne

Numerical Taxonomy of Phylloplane Bacteria Isolated from Lolium perenne

The Survival of Coryneform Bacteria during Periods of Prolonged Nutrient Starvation

Generation of hydroxyl analogous radicals by Arthrobacter sp.

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