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Titolo:
The effect of ozone in Scots pine (Pinus sylvestris L.): gene expression, biochemical changes and interactions with UV-B radiation
Autore:
Zinser, C; Jungblut, T; Heller, W; Seidlitz, HK; Schnitzler, JP; Ernst, D; Sandermann, H;
Indirizzi:
GSF, Natl Res Ctr Environm & Hlth, Inst Biochem Plant Pathol, D-85764 Neuherberg, Germany GSF Neuherberg Germany D-85764 Plant Pathol, D-85764 Neuherberg, Germany GSF, Natl Res Ctr Environm & Hlth, Exposure Chamber Grp, D-85764 Neuherberg, Germany GSF Neuherberg Germany D-85764 Chamber Grp, D-85764 Neuherberg, Germany
Titolo Testata:
PLANT CELL AND ENVIRONMENT
fascicolo: 9, volume: 23, anno: 2000,
pagine: 975 - 982
SICI:
0140-7791(200009)23:9<975:TEOOIS>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
CINNAMYL ALCOHOL-DEHYDROGENASE; SPRUCE PICEA-ABIES; ARABIDOPSIS-THALIANA; ULTRAVIOLET-B; PLANT RESPONSES; PROTEINS BETA-1,3-GLUCANASE; STILBENE SYNTHASE; MESSENGER-RNAS; NORWAY SPRUCE; INDUCTION;
Keywords:
Pinus sylvestris; AOT40 levels; conifers; cinnamyl alcohol dehydrogenase; ozone; Scots pine; simulated alpine climate; stilbene synthase; UV-B radiation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Ernst, D GSF, Natl Res Ctr Environm & Hlth, Inst Biochem Plant Pathol, IngolstadterLandstr 1, D-85764 Neuherberg, Germany GSF Ingolstadter Landstr 1 Neuherberg Germany D-85764 g, Germany
Citazione:
C. Zinser et al., "The effect of ozone in Scots pine (Pinus sylvestris L.): gene expression, biochemical changes and interactions with UV-B radiation", PL CELL ENV, 23(9), 2000, pp. 975-982

Abstract

Increased levels of both ozone and ultraviolet-B radiation (W-B) are typical for high-altitude sites. Here we report on interactive effects of both stresses on Scots pine (Pinus sylvestris L,). Scots pine seedlings were exposed in a phytotron to a simulated outdoor climate. To assess effects of ozone and of W-B radiation on the plants, ozone was added at ambient or at twice-ambient levels, and W-B was eliminated or added at a low ambient level, Visible needle damage became apparent at enhanced ozone concentrations after 10 d of exposure and increased continuously. The accumulated exposure over a threshold value of 40 nL L-1 ozone (AOT40) revealed that an ozone exposure dose of 10 muL L-1 h was necessary for the development of needle injury, regardless of the UV-B conditions. Cinnamyl alcohol dehydrogenase (CAD) and stilbene synthase (STS) have been reported to be induced by ozone. The mRNAs of these stress-related enzymes were induced only under twice-ambient ozone concentrations. Ozone-induced transient STS transcript levels reachedtheir maximal values between day 1 and day 5, and were more pronounced in the presence of W-B. Similarly, pinosylvin, as well as pinosylvin methyl ether contents, showed moderate transient increases under these conditions, In contrast, CAD mRNA content and CAD enzyme activity increased continuouslyunder enhanced ozone concentrations, Additional UV-B resulted in suppressed transcript level and enzymatic activity of CAD. The data indicate that inconifer needles, at the level of gene expression, there is an interaction between responses to UV-B and ozone.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/04/20 alle ore 08:11:45