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Titolo:
RESPONSE OF CELLULAR ANTIOXIDANTS TO OZONE IN WHEAT FLAG LEAVES AT DIFFERENT STAGES OF PLANT DEVELOPMENT
Autore:
BENDER J; WEIGEL HJ; WEGNER U; JAGER HJ;
Indirizzi:
BUNDESFORSCH ANSTALT LANDWIRTSCHAFT,INST PROD & OKOTOXIKOL,BUNDESALLEE 50 D-38116 BRAUNSCHWEIG GERMANY
Titolo Testata:
Environmental pollution
fascicolo: 1, volume: 84, anno: 1994,
pagine: 15 - 21
SICI:
0269-7491(1994)84:1<15:ROCATO>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRITICUM-AESTIVUM L; TOP FIELD CHAMBERS; ASCORBIC-ACID; PHASEOLUS-VULGARIS; HYDROGEN-PEROXIDE; PICEA-ABIES; CV ALBIS; GLUTATHIONE; YIELD; CULTIVARS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
J. Bender et al., "RESPONSE OF CELLULAR ANTIOXIDANTS TO OZONE IN WHEAT FLAG LEAVES AT DIFFERENT STAGES OF PLANT DEVELOPMENT", Environmental pollution, 84(1), 1994, pp. 15-21

Abstract

The effect of ozone (O-3) on growth, yield and foliar antioxidants ofspring wheat (Triticum aestivum L. cv. Turbo) was investigated in 1990 and 1991 in Braunschweig, Ger many. Plants were gr own full-season in pots in open-top chambers ventilated with charcoal-filtered (CF) airto which one or two levels of O-3 were added. Mean 8 h day(-1) (10.00-18.00 h) O-3 concentrations in the CF and CF + O-3 treatments were 5.9, 61.2 and 92.5 nl litre(-1) in 1990, and 4.7 and 86.4 nl litre(-1) in 1991. Plants that received the high O-3 level showed symptoms of premature senescence of the oldest leaves and yield reductions in both growing seasons. The contents of ascorbate and glutathione and the enzyme activities of ascorbate peroxidase and glutathione reductase were measured in symptomless flag leaves in weekly intervals before and afterthe beginning of anthesis. Leaf age had a significant effect on all antioxidants investigated. The O-3 exposures of about 90 nl litre(-1) increased the activity of ascorbate peroxidase and the concentration ofglutathione, but there were no pollutant effects on ascorbate contentand glutathione reductase activity. Measurements of the antioxidant levels throughout one day showed no clear indications of diurnal changes in the antioxidative capacity in wheat flag leaves. The results are discussed in relation to the role of antioxidants in O-3 detoxification.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 20:59:51