Antioxidant enzymatic protection during tobacco leaf ageing is affected by cytokinin depletion

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F11%3A00365377" target="_blank" >RIV/61389030:_____/11:00365377 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s10725-011-9571-4" target="_blank" >http://dx.doi.org/10.1007/s10725-011-9571-4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10725-011-9571-4" target="_blank" >10.1007/s10725-011-9571-4</a>

Result language
angličtina
Original language name
Antioxidant enzymatic protection during tobacco leaf ageing is affected by cytokinin depletion
Original language description
Plant ageing is associated with increased levels of ROS. Level of cytokinins is controlled by their irreversible degradation catalysed by CKX. The control and transgenic AtCKX2 plants differed substantially in their phenotypes. When the lowest leaves incontrols became yellow all leaves in AtCKX2 tobacco still remained green. Activities of antioxidant enzymes decreased with leaf age in both tobacco plants except for APX in the old leaves and GR in young leaves. Enhancement of GR activity at all leaf stages, an increase of SOD and a decline of catalase in young leaves, as well as an increase of APX in the oldest leaves were observed in AtCKX2 plant compared to control. Similar changes were detected after determination of isoenzymes on zymograms. It is evident that AtCKX2 plants had postponed onset of senescence despite the significantly lowered level of cytokinins. Enhanced antioxidant protection, especially in the oldest leaves, could subsidise this phenomenon.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CE - Biochemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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