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Titolo:
MICRONUTRIENT DEFICIENCY CHANGES ACTIVITIES OF SUPEROXIDE-DISMUTASE AND ASCORBATE PEROXIDASE IN TOBACCO PLANTS
Autore:
YU Q; OSBORNE L; RENGEL Z;
Indirizzi:
UNIV WESTERN AUSTRALIA,FAC AGR NEDLANDS WA 6907 AUSTRALIA UNIV WESTERN AUSTRALIA,FAC AGR NEDLANDS WA 6907 AUSTRALIA S CHINA AGR UNIV,COLL BIOTECHNOL GUANGZHOU 510652 PEOPLES R CHINA
Titolo Testata:
Journal of plant nutrition
fascicolo: 7, volume: 21, anno: 1998,
pagine: 1427 - 1437
SICI:
0190-4167(1998)21:7<1427:MDCAOS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXIDATIVE STRESS TOLERANCE; HIGH LIGHT-INTENSITY; PHASEOLUS-VULGARIS; TRANSGENIC PLANTS; DROUGHT-STRESS; PEA-PLANTS; OXYGEN; COPPER; LEAVES; OZONE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
Q. Yu et al., "MICRONUTRIENT DEFICIENCY CHANGES ACTIVITIES OF SUPEROXIDE-DISMUTASE AND ASCORBATE PEROXIDASE IN TOBACCO PLANTS", Journal of plant nutrition, 21(7), 1998, pp. 1427-1437

Abstract

The effects of copper (Cu), zinc (Zn), and manganese (Mn) deficiencies on the activities of superoxide dismutase (SOD) and ascorbate peroxidase (APx) were investigated in seedlings of Nicotiana tabacum cv. Xanthin. After germinating in sand for 7 days, plants were transplanted to solution culture with all nutrients or without Cu, Zn, or Mn. Plantsgrown without Mn developed visual deficiency symptoms 15 days after transplanting (DAT), and those grown without Zn showed Zn deficiency symptoms 26 DAT. In contrast, plants grown without Cu showed only minor symptoms of Cu deficiency at 33 DAT. When harvested 41 DAT, -Mn plantssuffered the largest, and -Cu the smallest reduction in shoot dry weight compared to plants supplied with all nutrients. Nutrient analysis in leaf tissue showed a considerable decrease in concentration of nutrients not supplied to plants. Total SOD, MnSOD+FeSOD, Cu/Zn SOD, and APx activities declined drastically in -Mn and -Zn plants, while total SOD, MnSOD+FeSOD and APx activities in -Cu plants remained significantly higher than those of control plants. It was concluded that micronutrient deficiencies (Cu, Zn, and Mn) can alter the activities of antioxidative enzymes in tobacco plants depending on the severity and the type of the deficiency stress.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 21:30:01