Antioxidant protection during ageing and senescence in transgenic tobacco with enhanced activity of cytokinin oxidase/dehydrogenase

0335903 - ÚEB 2010 RIV NL eng J - Journal Article
Procházková, Dagmar - Wilhelmová, Naděžda
Antioxidant protection during ageing and senescence in transgenic tobacco with enhanced activity of cytokinin oxidase/dehydrogenase.
Biologia Plantarum. Roč. 53, č. 4 (2009), s. 691-696. ISSN 0006-3134. E-ISSN 1573-8264
R&D Projects: GA ČR GP522/05/P558
Institutional research plan: CEZ:AV0Z50380511
Keywords : oxidative stress * reactive oxygen species * transgenic plants
Subject RIV: ED - Physiology
Impact factor: 1.656, year: 2009

We studied changes in physiological parameters of whole leaves and in antioxidant protection of chloroplasts during ageing and senescence of tobacco (Nicotiana tabacum L. cv. Samsun NN) leaves with enhanced cytokinin oxidase/dehydrogenase activity (CKX) or without it (WT). Old leaves of CKX plants maintained higher pigment content and photosystem 2 activity compared to WT leaves of the same age. Chloroplasts of old CKX plants showed better antioxidant capacity represented by higher superoxide dismutase, dehydroascorbate reductase and glutathione reductase activities.
Permanent Link: http://hdl.handle.net/11104/0180249