Content of carotenoids during ageing and senescence of tobacco leaves with genetically modulated life-span

0335871 - ÚEB 2010 RIV CZ eng J - Journal Article
Procházková, Dagmar - Haisel, Daniel - Wilhelmová, Naděžda
Content of carotenoids during ageing and senescence of tobacco leaves with genetically modulated life-span.
Photosynthetica. Roč. 47, č. 3 (2009), s. 409-413. ISSN 0300-3604. E-ISSN 1573-9058
R&D Projects: GA ČR GP522/05/P558
Institutional research plan: CEZ:AV0Z50380511
Keywords : cytokinin * reactive oxygen species * xanthophylls
Subject RIV: ED - Physiology
Impact factor: 1.072, year: 2009

We exploited leaves of tobacco (Nicotiana tabacum L., cv. Wisconsin 38) with introduced chimeric construct consisting of SAG12 promoter fused with ipt gene for cytokinin synthesis and therefore prolonged life-span. As a control we used its wild type. In 12-week-old plants, the first leaves of control plants showed senescence symptoms at the time of sampling. Carotenoid content decreased with increasing leaf age both in control and in transgenic plants. On the other hand, the first leaves of transgenic plants demonstrated better antioxidant capacity represented by carotenoids compared to the leaves of control plants of the same age. They stayed still green at this age.
Permanent Link: http://hdl.handle.net/11104/0180224