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SEEDSTICK Controls Arabidopsis Fruit Size by Regulating Cytokinin Levels and FRUITFULL
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SYSNO ASEP 0524174 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title SEEDSTICK Controls Arabidopsis Fruit Size by Regulating Cytokinin Levels and FRUITFULL Author(s) Di Marzo, M. (IT)
Herrera-Ubaldo, H. (ES)
Caporali, E. (IT)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Strnad, Miroslav (UEB-Q) RID, ORCID
Balanzà, V. (IT)
Ezquer, I. (AR)
Mendes, M.A. (IT)
de Folter, S. (MX)
Colombo, L. (IT)Number of authors 10 Source Title Cell Reports. - : Cell Press - ISSN 2211-1247
Roč. 30, č. 8 (2020), s. 2846-2857Number of pages 12 s. Language eng - English Country US - United States Keywords Arabidopsis ; cell elongation ; ckx7 ; cytokinins ; fruit size ; fruitfull ; MADS-box ; seedstick Subject RIV EB - Genetics ; Molecular Biology OECD category Biochemistry and molecular biology R&D Projects GA18-07563S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UEB-Q - RVO:61389030 UT WOS 000515534500029 EID SCOPUS 85079856502 DOI 10.1016/j.celrep.2020.01.101 Annotation Upon fertilization, the ovary increases in size and undergoes a complex developmental process to become a fruit. We show that cytokinins (CKs), which are required to determine ovary size before fertilization, have to be degraded to facilitate fruit growth. The expression of CKX7, which encodes a cytosolic CK-degrading enzyme, is directly positively regulated post-fertilization by the MADS-box transcription factor STK. Similar to stk, two ckx7 mutants possess shorter fruits than wild type. Quantification of CKs reveals that stk and ckx7 mutants have high CK levels, which negatively control cell expansion during fruit development, compromising fruit growth. Overexpression of CKX7 partially complements the stk fruit phenotype, confirming a role for CK degradation in fruit development. Finally, we show that STK is required for the expression of FUL, which is essential for valve elongation. Overall, we provide insights into the link between CKs and molecular pathways that control fruit growth. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2021 Electronic address http://doi.org/10.1016/j.celrep.2020.01.101
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