Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
OSMOREGULATORY RESPONSES OF BACTERIA ISOLATED FROM FRESH OR COMPOSTED, OLIVE-MILL WASTE-WATERS
Autore:
CUMMINGS SP; RUSSELL NJ;
Indirizzi:
UNIV LONDON WYE COLL,DEPT SCI BIOL,MICROBIOL LABS ASHFORD TN25 5AH KENT ENGLAND UNIV WALES COLL CARDIFF,SCH MOL & MED BIOSCI,BIOCHEM UNIT CARDIFF CF13US S GLAM WALES
Titolo Testata:
World journal of microbiology & biotechnology
fascicolo: 1, volume: 12, anno: 1996,
pagine: 61 - 67
SICI:
0959-3993(1996)12:1<61:OROBIF>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
HALOPHILIC EUBACTERIA; COMPATIBLE SOLUTES; BIOSYNTHESIS;
Keywords:
ALPECHIN; COMPATIBLE SOLUTE; FATTY ACID; HALOTOLERANT BACTERIA; MEMBRANE LIPID; OSMOREGULATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
S.P. Cummings e N.J. Russell, "OSMOREGULATORY RESPONSES OF BACTERIA ISOLATED FROM FRESH OR COMPOSTED, OLIVE-MILL WASTE-WATERS", World journal of microbiology & biotechnology, 12(1), 1996, pp. 61-67

Abstract

Halotolerant bacteria isolated from raw, olive-mill waste-waters (alpechin) and from composted alpechin could grow on solid medium containing up to 10% (w/v) NaCl. Most (70%) of these halotolerant isolates could also grow in liquid minimal medium with the same NaCl concentrationand three isolates from this group were chosen for further study. When grown in tryptic soy broth (TSB), two isolates responded to loweringof water activity (a(w)) by addition of NaCl or sucrose in the expected manner: by increasing the proportion of membrane anionic lipids diphosphatidylglycerol or phosphatidylglycerol. Some solute-specific differences were observed. In contrast, the third isolate did not alter its membrane phospholipid composition significantly in response to growth in NaCl, whereas in sucrose there was an increase in phosphatidylethanolamine. This response is contrary to the accepted interpretation ofthe function of such a(w)-dependent changes, as being a mechanism forpreserving the membrane lipid-bilayer phase. When all three isolates were grown in the presence of alpechin, there was a decrease in the proportion of phosphatidylglycerol and a rise in the level of phosphatidylethanolamine. Quantitative and qualitative differences in compatiblesolute composition were observed when the three isolates were grown in TSB with NaCl or sucrose added to lower a(w). The major compatible solutes in two of the isolates were proline and betaine, whereas in thethird they were proline, betaine and ectoine; one isolate also contained some trehalose when NaCl but not sucrose was the osmolyte.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 04:27:57