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Table 1 Distinguishing features of characterized BChl a -containing members of the OM60/NOR5 clade

From: Taxonomy and evolution of bacteriochlorophyll a-containing members of the OM60/NOR5 clade of marine gammaproteobacteria: description of Luminiphilus syltensis gen. nov., sp. nov., reclassification of Haliea rubra as Pseudohaliea rubra gen. nov., comb. nov., and emendation of Chromatocurvus halotolerans

Characteristic

1

2

3

4

Morphology

Size (in SYPHC medium) [μm]

1.2 – 2.2 × 0.6

1.2 – 1.8 × 0.7

1.2 – 1.5 × 0.6

1.2 -1.6 × 0.6

Shape (in SYPHC medium)

straight-to-bent rods, coccoid

straight-to-bent rods, coccoid

straight rods, coccoid

straight rods, coccoid

Storage compounds

PolyP, PHA

PolyP, PHA

PolyP, CP

PolyP, GLY

Motility

-

+

+

-

Cell aggregation

-

w

+

+

Pigmentation

BChl a absorption [nm] (in vivo)

801, 871

802, 877

802, 876

804, 821, 871

BChl a production [nmol/mg dw]

1.2

1.1*

3.5

4.4

Carotenoid absorption [nm] (in acetone/methanol)

465, 495, 529

467, 496, 531

465, 495, 529

470, 496, 530

Diffusible brown compound

-

+

-

-

Chemotaxonomy

Fatty acid 16:1 ω6c

-

-

+

-

Main hydroxy fatty acids (>1% of total fatty acids)

10:0 3OH, 12:0 3OH

11:0 3OH, 12:0 3OH, 12:1 3OH

10:0 3OH

12:1 3OH, 12:0 2OH

Lipoquinones

Q8 (tr. Q7)

Q8

Q8

Q8*

Polar lipids

PG, PE, PN

PG, PE, PL, PN

PG, PE, PL

PG, PE, PL

DNA G + C content [mol%]

57

63*

58

66

Physiology

NaCl range (optimum) [% w/v]

1 – 9 (3)

0 – 18 (4)*

1 – 7 (2)

0.7 – 4.2 (3.5)*

Temp. range (optimum) [°C]

12 – 32 (28)

7 – 40 (37)*

9 – 33 (28)

15 – 44 (30)*

Antibiotic sensitivity

Imipenem (10 μg)

+

-*

+

-

Polymyxin B (300 U)

+

+*

+

-

Required supplements

L-histidine

+

-

-

-

Biotin

+

+*

+

+

Thiamin

+

+*

+

+

Vitamin B12

+

+*

+

+

Enzyme activities

Catalase

+

+

w

+

Oxidase

+

+ [-*]

+

+

Aesculinase

-

-

-

+

Tweenase 20/80

+/w

+/w

+/w

+/+

Urease

-

-

+

-

Utilization of

Sucrose

-

-

+

-

Glycerol

w

-

w

w [-*]

Butanol

+

-

w

+

Propionate

+

+ [-*]

w

+ [-*]

Butyrate

+

+ [-*]

w

+

DL-lactate

+

-

-

+ [-*]

2-oxoglutarate

+

-

+

+

L-serine

-

-

+

+ [-*]

L-proline

-

+

+

-

L-isoleucine

-

+

-

+

L-arginine

-

-

+

-

L-phenylalanine

+

-

-

-

L-glutamate

-

+

+

+ [-*]

L-glutathione

-

+

+

+

  1. All strains were positive in the utilization of acetate, L-alanine, fumarate, DL-3-hydroxybutyrate, DL-malate, oxaloacetate, pyruvate, succinate, and L-threonine. The following compounds were not utilized by all tested strains: citrate, ethanol, formate, D-fructose, D-glucose, glycolate, and methanol. Degradation of starch and gelatin, reduction of nitrate to nitrite and stimulation of growth by thiosulfate were negative in all strains, as well as diagnostic tests for the enzymes tryptophanase and arginine dihydrolase. Data marked with an asterisk were taken from the literature [18, 31]. Published data that disagree with our results are shown in brackets. Abbreviations: PolyP polyphosphate, PHA polyhydroxyalkanoate, CP cyanophycin, GLY glycogen, PG phosphatidylglycerol, PE phosphatidylethanolamine, PL unidentified phospholipid, PN unidentified aminophospholipid, w weakly positive reaction. Strains: 1, Luminiphilus syltensis Ivo14T; 2, Chromatocurvus halotolerans DSM 23344T; 3, Congregibacter litoralis DSM 17192T; 4, Pseudohaliea (= Haliea) rubra DSM 19751T.
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BMC Microbiology

ISSN: 1471-2180

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