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Phytohormones in Sweet Cherry Buds During Winter Rest and Bud Development
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SYSNO ASEP 0575731 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Phytohormones in Sweet Cherry Buds During Winter Rest and Bud Development Author(s) Götz, K. P. (DE)
Chmielewski, F. M. (DE)
Tarkowská, Danuše (UEB-Q) RID, ORCID
Pěnčík, Aleš (UEB-Q) ORCID, RID, SAI
Novák, Ondřej (UEB-Q) RID, ORCID, SAINumber of authors 5 Source Title Journal of Plant Growth Regulation. - : Springer - ISSN 0721-7595
Roč. 42, č. 4 (2023), s. 2519-2529Number of pages 11 s. Language eng - English Country DE - Germany Keywords Auxins ; Cytokinins ; Flower buds ; Gibberellins ; Prunus avium L OECD category Plant sciences, botany R&D Projects EF16_019/0000827 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000738 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UEB-Q - RVO:61389030 UT WOS 000828439900002 EID SCOPUS 85134594512 DOI 10.1007/s00344-022-10723-0 Annotation This (two-season) study was undertaken to assess the involvement of gibberellins (GAs), cytokinins (CKs), and auxins (AX) in dormancy of the sweet cherry buds ‘Summit’. Our hypothesis consisted in the assumption that representatives of these hormone groups are able to mark the transition between different dormancy phases. Changes in the transition between endo- and ecodormancy and the stages of ontogenetic development were not recognizable by bioactive GA1, GA5, GA7. The transient increase of GA3 during ecodormancy might be interpreted as an indication of the preservation of ecodormancy. The content of the biological active bases tZ, cZ, and DHZ was equal between endo- and ecodormancy. However, the content increased significantly in the first phase of ontogenetic development. The summation of the representatives of the various CKs (total iP-type, total tZ-type, total CK bases, total CK ribosides, total CK nucleotides, total O-glucosides, total N-glucosides, and total CKs) showed no differences regarding their levels during endo- and ecodormancy. These values increased markedly in the subsequent phase. AX increased after ecodormancy. By contrast, from side green until open cluster no differences occurred. As shown for AX, the content of oxIAA increased after ecodormancy. The content of IAAsp was low during endodormancy and increased transiently during ecodormancy and early ontogenetic development. This study revealed that no changes in the content of different bioactive GAs (exception GA3), CKs, and AX occurred during winter rest, and more precisely, during endo- and ecodormancy. These metabolites, therefore, are not suitable to differentiate between these dormancy phases. The ontogenesis is accompanied by specific changes in the content of bioactive molecules, precursors, and conjugation products. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2024 Electronic address https://doi.org/10.1007/s00344-022-10723-0
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