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Titolo:
Utilization of the compatible solutes sucrose and trehalose by purple sulfur and nonsulfur bacteria
Autore:
Welsh, DT; Guyoneaud, R; Caumette, P;
Indirizzi:
Univ Bordeaux 1, Lab Oceanol Biol, F-33120 Arcachon, France Univ Bordeaux 1 Arcachon France F-33120 l Biol, F-33120 Arcachon, France CNRS, URM 5805, F-33120 Arcachon, France CNRS Arcachon France F-33120CNRS, URM 5805, F-33120 Arcachon, France
Titolo Testata:
CANADIAN JOURNAL OF MICROBIOLOGY
fascicolo: 10, volume: 44, anno: 1998,
pagine: 974 - 979
SICI:
0008-4166(199810)44:10<974:UOTCSS>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
OSMOTIC-STRESS; CARBOHYDRATE ACCUMULATION; CONTINUOUS-CULTURE; GLYCINE BETAINE; GEN-NOV; OSMOADAPTATION; IDENTIFICATION; CYANOBACTERIA; SEDIMENTS; FRUCTOSE;
Keywords:
Chromatiaceae; purple sulfur bacteria; purple nonsulfur bacteria; sugar utilization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Welsh, DT Univ Parma, Dipartimento Sci Ambientali, Viale Sci, I-43100 Parma, Italy Univ Parma Viale Sci Parma Italy I-43100 , I-43100 Parma, Italy
Citazione:
D.T. Welsh et al., "Utilization of the compatible solutes sucrose and trehalose by purple sulfur and nonsulfur bacteria", CAN J MICRO, 44(10), 1998, pp. 974-979

Abstract

Owing to their ubiquity as compatible solutes, sucrose and trehalose and their constituent monosaccharides, glucose and fructose, may represent a significant source of carbon for the growth of other bacteria. We investigatedsugar utilization by 34 strains of purple sulfur and nonsulfur bacteria isolated from coastal lagoons. Amongst the purple nonsulfur bacteria, sugar utilization was common with almost all strains utilizing the tested monosaccharides and 70 and 50% of strains utilizing sucrose and trehalose, respectively. Sugar utilization was rarer amongst the purple sulfur bacteria, with none of the strains using glucose or trehalose. Fructose, was utilized by 50% of isolates and sucrose was utilized only by strains of Thiorhodococcus. Surprisingly, although unable to use glucose directly, Thiorhodococcus strains used both the glucose and fructose moieties of sucrose and utilized glucose slowly in the presence of fructose, indicating that these strains maybe impaired in glucose transport, rather than glucose metabolism per se. Disaccharide metabolism was dependent on sugar uptake and none of the strains produced trehalases or sucrases. Efficacy of sugar utilization varied widely with specific growth yield between 0.09 and 0.78 g dry weight-g sugar(-1), and was dependent upon both the sugar and the strain. Similarly, specific growth rates were highly variable with strain and the sugar present and ranged between 5.4 and 0.5 x 10(-2) .h(-1). Overall, data indicate that in natural high salinity ecosystems, purple sulfur and particularly purple nonsulfur bacteria may be able to efficiently exploit compatible solutes released to the environment by other members of the bacterial community.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/10/20 alle ore 02:03:12