Počet záznamů: 1

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

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, ORCID}
Zdroj.dok.	Plant Growth Regulation. - : Springer - ISSN 0167-6903 Roč. 65, č. 1 (2011), s. 23-34
Poč.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	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