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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CE - Biochemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Plant Growth Regulation

ISSN

0167-6903

e-ISSN

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Svazek periodika

65

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

23-34

Kód UT WoS článku

00294690000003

EID výsledku v databázi Scopus

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