0172254 - UEB-Q 20023039 RIV PL eng J - Journal Article
Procházková, Dagmar - Wilhelmová, Naděžda
Comparison of Resistance to Water Stress of Two Wheat Cultivars.
Polska Akademia Nauk. Wydzial Nauk Rolniczych i Lesnych. Zeszyty Problemowe Postepow Nauk Rolniczych. Phytopathologia Polonica. Roč. 481, - (2002), s. 217-221. ISSN 1230-0810
R&D Projects: GA ČR GA522/01/0846
Institutional research plan: CEZ:AV0Z5038910
Keywords : drought * antioxidative enzymes * Triticum aestivum L.
Subject RIV: GE - Plant Breeding

Leaf senescence is an organized developmental program. Role for active oxygen species including superoxide, hydrogen peroxide, hydroxyl free radicals and singlet oxygen have been proposed in senescence [THOMPSON et al. 1987]. Presence of these reactive oxygen species leads to oxidative damage in cellular molecules, such as proteins, lipids and nucleic acids. At the cellular level, organelles are disassembled in a precise hierarchy. Chloroplasts are the first to be affected during the senescence program while the nucleus and mitochondria are last [QUIRING et al. 1999]. Plant cells are protected normally against the destruction effects of reactive oxygen species by a complex of enzymatic and nonenzymatic mechanisms: superoxide dismutase, ascorbate peroxidase, catalase, glutathione reductase, tocopherol, beta-carotene and ascorbate form antioxidative defence.
Permanent Link: http://hdl.handle.net/11104/0069293