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Circadian clock components control daily growth activities by modulating cytokinin levels and cell division-associated gene expression in Populus trees
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SYSNO ASEP 0490870 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Circadian clock components control daily growth activities by modulating cytokinin levels and cell division-associated gene expression in Populus trees Author(s) Edwards, K. D. (GB)
Takata, N. (BE)
Johansson, M. (SE)
Jurča, M. (US)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Hényková, Eva (UEB-Q) ORCID
Liverani, S. (GB)
Kozarewa, I. (SE)
Strnad, Miroslav (UEB-Q) RID, ORCID
Millar, A. J. (GB)
Ljung, K. (SE)
Eriksson, M. (SE)Number of authors 12 Source Title Plant Cell and Environment. - : Wiley - ISSN 0140-7791
Roč. 41, č. 6 (2018), s. 1468-1482Number of pages 15 s. Language eng - English Country GB - United Kingdom Keywords biomass production ; cell division ; circadian clock ; cytokinin ; growth ; lignification ; photoperiod Subject RIV EB - Genetics ; Molecular Biology OECD category Plant sciences, botany R&D Projects LO1204 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UEB-Q - RVO:61389030 UT WOS 000434162400020 EID SCOPUS 85045241946 DOI 10.1111/pce.13185 Annotation Trees are carbon dioxide sinks and major producers of terrestrial biomass with distinct seasonal growth patterns. Circadian clocks enable the coordination of physiological and biochemical temporal activities, optimally regulating multiple traits including growth. To dissect the clock's role in growth, we analysed Populus tremula × P. tremuloides trees with impaired clock function due to down-regulation of central clock components. late elongated hypocotyl (lhy-10) trees, in which expression of LHY1 and LHY2 is reduced by RNAi, have a short free-running period and show disrupted temporal regulation of gene expression and reduced growth, producing 30–40% less biomass than wild-type trees. Genes important in growth regulation were expressed with an earlier phase in lhy-10, and CYCLIN D3 expression was misaligned and arrhythmic. Levels of cytokinins were lower in lhy-10 trees, which also showed a change in the time of peak expression of genes associated with cell division and growth. However, auxin levels were not altered in lhy-10 trees, and the size of the lignification zone in the stem showed a relative increase. The reduced growth rate and anatomical features of lhy-10 trees were mainly caused by misregulation of cell division, which may have resulted from impaired clock function. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2019
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