Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2005 by Universidad Católica de Valparaíso -- Chile
Vol. 8 No. 3, Issue of December 15, 2005
 

Table 2. Morphological and physiological characteristics of isolate DK6 grown with anaerobic-light conditions at 30ºC and modifications to the basal minimal medium of Ormerod et al. (1961).

Characteristic

DK6

Rhodopseudomonas blasticaa

Colour of culture
(anaerobic-light)

red

red

Colour of culture
(aerobic-dark)

white

white to pink

Cell shape

short rod

rod

Gram staining

negative

negative

Motility

non motile

non motile

Biotin

require

require

Nicotinic acid

require

require

p-aminobenzoic acid

require

require

Thiamine hydrochloride

require

require

pH (5-9)

growth

o

Optimum pH

6.5-7.5

6.5-7.5

Temperature (25-45ºC)

growth

o

Optimum temperature

30ºC

30-35ºC

Acetate

+

+

Arginine

-

o

Benzoate

-

-

Butyrate

+

+

Caproate

+

o

Citrate

+

+

Ethanolb

+

-

Formate

-

-

Fructose

+

+

Fumarate

+

+

Glucose

+

+

Gluconate

-

o

Glycerol

+

+

Glycolate

-

-

Gelatin

+

+

Lactate

+

+

Malonate

+

o

Methanol

-

-

Mannitol

+

+

Nitrate

+

o

Propionate

+

+

Pyruvate

+

+

Succinate

+

+

Sulfide

-

-

Thiosulfateb

+

-

Sorbitol

+

+

Tartrate

-

-


+ = utilized
-  = not utilized
o=not determined
a=Code from Imhoff and Truper, 1989
b= substrate in respect of which the utilization by DK6 and Rhodopseudomonas blastica differs


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