title: Differences in the activity and concentration of elements of the antioxidant system in different layers of Brassica pekinensis head.
abstract: Differences in the activity of superoxide dismutase, catalase (CAT) and ascorbate peroxidase (APX) as well as in the concentration of ascorbate, tocopherol and hydrogen peroxide (H₂O₂) were found in leaves from different layers of the Chinese cabbage (Brassica pekinensis (Lour.) Rupr.) head. The youngest chlorophyll-deficient leaves from the most inner layers of the cabbage head were characterized by a high concentration of ascorbate, high activity of iron superoxide dismutase (FeSOD), cooper/zinc superoxide dismutase (Cu/ZnSOD) and a low content of H₂O₂. On the other hand, activity of CAT, manganese superoxide dismutase (MnSOD) and APX and tocopherol content were highest in chlorophyll-rich leaves from outer parts. The results of this work are interesting from the human nutrition standpoint, as the measured antioxidants have beneficial effects on human health. They can also be utilized to improve storage conditions due to an unequivocal function of antioxidant molecules in maintaining postharvest quality of vegetables.
authors: Institute of Biology, Pedagogical University, ul. Podbrzezie 3, 31-054 Krakow, Poland.
authors: Sylwia
authors: S
authors: Goraj
authors: Marta
authors: M
authors: Libik-Konieczny
authors: Ewa
authors: E
authors: Surówka
authors: Piotr
authors: P
authors: Rozpądek
authors: Andrzej
authors: A
authors: Kalisz
authors: Andrzej
authors: A
authors: Libik
authors: Michał
authors: M
authors: Nosek
authors: Piotr
authors: P
authors: Waligórski
authors: Zbigniew
authors: Z
authors: Miszalski
mesh_terms: D000367:Age Factors; D000975:Antioxidants / Q000737:chemistry* / Q000378:metabolism*; D060387:Ascorbate Peroxidases / Q000378:metabolism; D001205:Ascorbic Acid / Q000378:metabolism; D001937:Brassica / Q000737:chemistry* / Q000378:metabolism*; D002374:Catalase / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000378:metabolism; D018384:Oxidative Stress; D018515:Plant Leaves / Q000737:chemistry / Q000254:growth & development* / Q000378:metabolism*; D013482:Superoxide Dismutase / Q000378:metabolism; D024505:Tocopherols / Q000378:metabolism
chemical_list: D000975:Antioxidants; D006861:Hydrogen Peroxide; D060387:Ascorbate Peroxidases; D002374:Catalase; D013482:Superoxide Dismutase; D001205:Ascorbic Acid; D024505:Tocopherols