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Antioxidant enzymatic protection during tobacco leaf ageing is affected by cytokinin depletion
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SYSNO ASEP 0365377 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Antioxidant enzymatic protection during tobacco leaf ageing is affected by cytokinin depletion Tvůrce(i) Mýtinová, Zuzana (UEB-Q)
Motyka, Václav (UEB-Q) RID, ORCID
Haisel, Daniel (UEB-Q) RID, ORCID
Lubovská, Zuzana (UEB-Q)
Trávníčková, Alena (UEB-Q) ORCID
Dobrev, Petre (UEB-Q) RID, ORCID
Holík, Josef (UEB-Q) RID, ORCID
Wilhelmová, Naděžda (UEB-Q) RID, ORCIDZdroj.dok. Plant Growth Regulation. - : Springer - ISSN 0167-6903
Roč. 65, č. 1 (2011), s. 23-34Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Ageing ; Antioxidant enzymes ; Cytokinins Vědní obor RIV CE - Biochemie CEP GA522/03/0312 GA ČR - Grantová agentura ČR IAA600380701 GA AV ČR - Akademie věd LC06034 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000294690000003 DOI https://doi.org/10.1007/s10725-011-9571-4 Anotace 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 in controls 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. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2012
Počet záznamů: 1