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Titolo:
Osmoprotection mechanisms in rhizobia isolated from Vicia faba var. major and Cicer arietinum
Autore:
Brhada, F; Poggi, MC; de Sype, GV; Le Rudulier, D;
Indirizzi:
Univ Mohammed 5, Fac Sci, Lab Microbiol & Biol Mol, Rabat, Morocco Univ Mohammed 5 Rabat Morocco Lab Microbiol & Biol Mol, Rabat, Morocco Univ Nice, Fac Sci & Tech, Lab Biol Vegetale & Microbiol, F-06108 Nice 2, France Univ Nice Nice France 2 iol Vegetale & Microbiol, F-06108 Nice 2, France
Titolo Testata:
AGRONOMIE
fascicolo: 6-7, volume: 21, anno: 2001,
pagine: 583 - 590
SICI:
0249-5627(200109/11)21:6-7<583:OMIRIF>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
GLYCINE BETAINE BIOSYNTHESIS; OSMOTIC-STRESS; SOYBEAN RHIZOBIA; ESCHERICHIA-COLI; SALT; MELILOTI; CHOLINE; MODULATION; ACCUMULATION; BACTEROIDS;
Keywords:
rhizobia; osmoprotection; choline; glycine betaine;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Brhada, F Univ Mohammed 5, Fac Sci, Lab Microbiol & Biol Mol, BP 1014, Rabat, Morocco Univ Mohammed 5 BP 1014 Rabat Morocco BP 1014, Rabat, Morocco
Citazione:
F. Brhada et al., "Osmoprotection mechanisms in rhizobia isolated from Vicia faba var. major and Cicer arietinum", AGRONOMIE, 21(6-7), 2001, pp. 583-590

Abstract

Research of mechanisms involved in osmoprotection of two rhizobia strains isolated from nodules of Vicia faba var. major and one strain nodulating Cicer arietinum, showed that choline and glycine-betaine improved growth in salt stress conditions. Provided radioactive choline was converted into glycine betaine catabolized at low osmolarity and accumulated under osmotic stress. Enzyme activities involved in the synthesis of glycine betaine from choline were not modified by salt whereas addition of choline to the growth medium enhanced them. Exogenous radioactive glycine betaine was accumulated in salt stressed bacteria after one hour incubation but catabolized four hours later, suggesting a transient accumulation. Growth experiments indicated that betaine and its derivatives could be used as nitrogen and carbon sources. An investigation, by liquid phase chromatography, revealated accumulation of glutamate and alanine at different levels according to the strain and degree of stress.

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Documento generato il 27/09/20 alle ore 18:40:42