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Titolo:
Unsaturated fatty acids in membrane lipids protect the photosynthetic machinery against salt-induced damage in Synechococcus
Autore:
Allakhverdiev, SI; Kinoshita, M; Inaba, M; Suzuki, I; Murata, N;
Indirizzi:
Natl Inst Basic Biol, Dept Regulat Biol, Okazaki, Aichi 4448585, Japan Natl Inst Basic Biol Okazaki Aichi Japan 4448585 ki, Aichi 4448585, Japan Russian Acad Sci, Inst Basic Biol Problems, Pushchino 142292, Moscow Region, Russia Russian Acad Sci Pushchino Moscow Region Russia 142292 cow Region, Russia Obihiro Univ Agr & Vet Med, Dept Bioresource Sci, Obihiro, Hokkaido 0808555, Japan Obihiro Univ Agr & Vet Med Obihiro Hokkaido Japan 0808555 0808555, Japan
Titolo Testata:
PLANT PHYSIOLOGY
fascicolo: 4, volume: 125, anno: 2001,
pagine: 1842 - 1853
SICI:
0032-0889(200104)125:4<1842:UFAIML>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALDEHYDE DEHYDROGENASE GENE; PHOTOSYSTEM-II PARTICLES; BLUE-GREEN-ALGAE; OXYGEN EVOLUTION; NA+/H+ EXCHANGE; LOW-TEMPERATURE; OSMOTIC-STRESS; CYANOBACTERIUM; TOLERANCE; SYNECHOCYSTIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Murata, N Natl Inst Basic Biol, Dept Regulat Biol, Okazaki, Aichi 4448585,Japan Natl Inst Basic Biol Okazaki Aichi Japan 4448585 4448585, Japan
Citazione:
S.I. Allakhverdiev et al., "Unsaturated fatty acids in membrane lipids protect the photosynthetic machinery against salt-induced damage in Synechococcus", PLANT PHYSL, 125(4), 2001, pp. 1842-1853

Abstract

In this study, the tolerance to salt stress of the photosynthetic machinery was examined in relation to the effects of the genetic enhancement of theunsaturation of fatty acids in membrane lipids in wild-type and desA(+) cells of Synechococcus sp. PCC 7942. Wild-type cells synthesized saturated and mono-unsaturated fatty acids, whereas desA(+) cells, which had been transformed with the desA gene for the Delta 12 acyl-lipid desaturase of Synechocystis sp. PCC 6803, also synthesized diunsaturated fatty acids. Incubationof wild-type and desA(+) cells with 0.5 M NaCl resulted in the rapid loss of the activities of photosystem I, photosystem II, and the Na+/H+ antiportsystem both in light and in darkness. However, desA(+) cells were more tolerant to salt stress and osmotic stress than the wild-type cells. The extent of the recovery of the various photosynthetic activities from the effectsof 0.5 M NaCl was much greater in desA(+) cells than in wild-type cells. The photosystem II activity of thylakoid membranes from desA(+) cells was more resistant to 0.5 M NaCl than that of membranes from wild-type cells. These results demonstrated that the genetically engineered increase in unsaturation of fatty acids in membrane lipids significantly enhanced the tolerance of the photosynthetic machinery to salt stress. The enhanced tolerance was due both to the increased resistance of the photosynthetic machinery to the salt-induced damage and to the increased ability of desA(+) cells to repair the photosynthetic and Na+/H+ antiport systems.

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Documento generato il 26/01/20 alle ore 16:05:36