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Cytokinin regulates the activity of reproductive meristems, flower organ size, ovule formation, and thus seed yield in Arabidopsis thaliana
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SYSNO ASEP 0368587 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Cytokinin regulates the activity of reproductive meristems, flower organ size, ovule formation, and thus seed yield in Arabidopsis thaliana Author(s) Bartrina, I. (DE)
Otto, E. (DE)
Strnad, Miroslav (UEB-Q) RID, ORCID
Werner, T. (DE)
Schmülling, T. (DE)Number of authors 5 Source Title Plant Cell. - : Oxford University Press - ISSN 1040-4651
Roč. 23, č. 1 (2011), s. 69-80Number of pages 12 s. Language eng - English Country US - United States Keywords SHOOT APICAL MERISTEM ; STEM-CELL FATE ; RESPONSE REGULATORS ; PLANT DEVELOPMENT ; HOMEOBOX GENES Subject RIV EF - Botanics R&D Projects GA301/08/1649 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000287860300009 DOI 10.1105/tpc.110.079079 Annotation The size and activity of the shoot apical meristem is regulated by transcription factors and low molecular mass signals, including the plant hormone cytokinin. The cytokinin status of the meristem depends on different factors, including metabolic degradation of the hormone, which is catalyzed by cytokinin oxidase/dehydrogenase (CKX) enzymes. Here, we show that CKX3 and CKX5 regulate the activity of the reproductive meristems of Arabidopsis thaliana. CKX3 is expressed in the central WUSCHEL (WUS) domain, while CKX5 shows a broader meristematic expression. ckx3 ckx5 double mutants form larger inflorescence and floral meristems. An increased size of the WUS domain and enhanced primordia formation indicate a dual function for cytokinin in defining the stem cell niche and delaying cellular differentiation. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2012
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