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Titolo:
SUCROSE IS A NONACCUMULATED OSMOPROTECTANT IN SINORHIZOBIUM-MELILOTI
Autore:
GOUFFI K; PICHEREAU V; ROLLAND JP; THOMAS D; BERNARD T; BLANCO C;
Indirizzi:
UNIV RENNES 1,UPRESA CNRS 6026,GRP MEMBRANES & OSMOREGULAT,CAMPUS DE BEAULIEU,AV DU GEN LECLERC F-35042 RENNES FRANCE UNIV RENNES 1,UPRESA CNRS 6026,GRP MEMBRANES & OSMOREGULAT F-35042 RENNES FRANCE UNIV RENNES 1,UPRESA CNRS 6026,GRP CANAUX & RECEPTEURS MEMBRANAIRES F-35042 RENNES FRANCE
Titolo Testata:
Journal of bacteriology
fascicolo: 19, volume: 180, anno: 1998,
pagine: 5044 - 5051
SICI:
0021-9193(1998)180:19<5044:SIANOI>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
GLYCINE BETAINE; BREVIBACTERIUM-LINENS; OSMOTIC-STRESS; WATER-STRESS; ACCUMULATION; BACTERIA; OSMOREGULATION; SOLUTES; OSMOADAPTATION; CYANOBACTERIA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
36
Recensione:
Indirizzi per estratti:
Citazione:
K. Gouffi et al., "SUCROSE IS A NONACCUMULATED OSMOPROTECTANT IN SINORHIZOBIUM-MELILOTI", Journal of bacteriology, 180(19), 1998, pp. 5044-5051

Abstract

Intracellular accumulation of sucrose in response to lowered water activity seems to occur only in photosynthetic organisms. Here we demonstrate, for the first time, the potent ability of this common sugar, supplied exogenously, to reduce growth inhibition of Sinorhizobium meliloti cells in media of inhibitory osmolarity. Independently of the nature of the growth substrates and the osmotic agent, sucrose appears particularly efficient in promoting the recovery of cytoplasmic volume after plasmolysis. Surprisingly, sucrose is not accumulated by the bacteria at an osmotically efficient level. Instead, it strongly stimulatesthe accumulation of the main endogenous osmolytes glutamate and N-acetylglutaminylglutamine amide (NAGGN), Examining cell volume changes during the hyperosmotic treatment, we found a close correlation between the enhancement of the osmotically active solute pool and the increasein cell volume. Sucrose shares several features with ectoine, anothernonaccumulated osmoprotectant for S. meliloti. Overall, osmoregulation in S. meliloti appears to be strongly divergent from that in mast bacteria.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/08/20 alle ore 16:33:51