Počet záznamů: 1
Contrasting patterns of cytokinins between years in senescing aspen leaves
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SYSNO ASEP 0476485 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Contrasting patterns of cytokinins between years in senescing aspen leaves Tvůrce(i) Edlund, E. (SE)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Karady, M. (SE)
Ljung, K. (SE)
Jansson, S. (SE)Celkový počet autorů 5 Zdroj.dok. Plant Cell and Environment. - : Wiley - ISSN 0140-7791
Roč. 40, č. 5 (2017), s. 622-634Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova leaf senescence ; arabidopsis-thaliana ; autumn senescence ; gene-expression ; populus-trichocarpa ; mass-spectrometry ; tobacco plants ; translocation ; biosynthesis ; identification ; autumn senescence ; gene expression ; metabolism ; Populus tremula ; profiling Vědní obor RIV CB - Analytická chemie, separace Obor OECD Plant sciences, botany CEP GA14-34792S GA ČR - Grantová agentura ČR LO1204 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UEB-Q - RVO:61389030 UT WOS 000398850200004 DOI 10.1111/pce.12899 Anotace Cytokinins are plant hormones that typically block or delay leaf senescence. We profiled 34 different cytokinins/cytokinin metabolites (including precursors, conjugates and degradation products) in leaves of a free-growing mature aspen (Populus tremula) before and after the initiation of autumnal senescence over three consecutive years. The levels and profiles of individual cytokinin species, or classes/groups, varied greatly between years, despite the fact that the onset of autumn senescence was at the same time each year, and senescence was not associated with depletion of either active or total cytokinin levels. Levels of aromatic cytokinins (topolins) were low and changed little over the autumn period. Diurnal variations and weather-dependent variations in cytokinin content were relatively limited. We also followed the expression patterns of all aspen genes implicated as having roles in cytokinin metabolism or signalling, but neither the pattern of regulation of any group of genes nor the expression of any particular gene supported the notion that decreased cytokinin signalling could explain the onset of senescence. Based on the results from this tree, we therefore suggest that cytokinin depletion is unlikely to explain the onset of autumn leaf senescence in aspen. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2018
Počet záznamů: 1