Antioxidants in sun and shade leaves of sour orange trees (Citrus aurantium) after long-term acclimation to elevated CO2

Autor:	Donald L. Hendrix, Peter Schwanz, Bruce A. Kimball, Andrea Polle, S. B. Idso
Rok vydání:	1996
Předmět:	Antioxidant biology Physiology Chemistry medicine.medical_treatment Plant Science Orange (colour) biology.organism_classification Malondialdehyde Acclimatization Superoxide dismutase Lipid peroxidation chemistry.chemical_compound Horticulture Rutaceae Catalase Botany biology.protein medicine
Zdroj:	Journal of Experimental Botany. 47:1941-1950
ISSN:	1460-2431 0022-0957
DOI:	10.1093/jxb/47.12.1941
Popis:	Antioxidative systems and the contents of pigments, malondialdehyde, soluble protein, and carbohydrate were investigated in sun- and shade-acclimated leaves of sour orange (Citrus aurantium) trees that had been grown for 7.5 years under ambient and elevated (+300 μmol mol -1 ) atmospheric CO 2 concentrations. Sun-acclimated leaves contained higher ascorbate, glutathione and soluble carbohydrate contents and higher catalase activities than shade-acclimated leaves. The activities of superoxide dismutases, which belonged to the family of Cu/Zn-isozymes, were similar in sun-and shade-acclimated leaves and decreased in response to enhanced CO 2 . In shade-acclimated leaves, none of the other parameters studied was affected by elevated CO 2 . In sun-acclimated leaves elevated CO 2 caused increases in carbohydrate and ascorbate contents. There was no evidence for enhanced lipid peroxidation as assessed from the determination of the malondialdehyde contents under either conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::801779a5121c2dccd7f6c179dfea1f7e https://doi.org/10.1093/jxb/47.12.1941 Zobrazit plný text záznamu