Antioxidant status of anoxia‐tolerant and ‐intolerant plant species under anoxia and reaeration

• DOI: 10.1034/j.1399-3054.2000.100405.x
• Publication Date: 2003-03-12T18:27:27Z
• Authors: Olga B. Blokhina; Eija Virolainen; Kurt V. Fagerstedt; Antti Hoikkala; Kristiina Wähälä; Tamara V. Chirkova
• Keywords: Dehydroascorbic acid

The redox potential of the cell, as well antioxidant status tissue, are considered to be important regulatory constituents in an adaptive response plants. Here involvement active antioxidants ascorbic acid (AA), reduced glutathione (GSH) and α ‐ β ‐tocopherols reactive oxygen species scavenging, effect anoxic stress on their reduction state were studied 4 anoxia‐tolerant ‐intolerant plant species: Iris germanica L., pseudacorus wheat ( Triticum aestivum L. cv. Leningradka) rice Oryza sativa VNIIR). initial content (both AA GSH) was higher rhizomes more spp., compared with that roots cereals. predominant form ascorbate dehydroascorbic (DHA) cereals spp. Imposition anoxia subsequent reoxygenation resulted overall depletion forms antioxidants. No concurrent increase oxidised (DHA conjugated glutathione) observed samples. ‐tocopherol range 1–2 μg g −1 fresh weight, while anoxia‐intolerant I. (7.2 weight) tolerant (1.5 weight). In , a significant decrease levels only after long‐term (45 days) anoxia. results suggested exclusion GSH from cycling under prolonged anoxia, concomitant state, anoxia‐induced ‐tocopherols.