Počet záznamů: 1
Cytokinins Are Initial Targets of Light in the Control of Bud Outgrowth(1[OPEN])
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SYSNO ASEP 0468498 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Cytokinins Are Initial Targets of Light in the Control of Bud Outgrowth(1[OPEN]) Tvůrce(i) Roman, H. (FR)
Girault, T. (FR)
Barbier, F. (FR)
Peron, T. (FR)
Brouard, N. (FR)
Pěnčík, Aleš (UEB-Q) ORCID, RID, SAI
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Vian, A. (FR)
Sakr, S. (FR)
Lothier, J. (FR)
Le Gourrierec, J. (FR)
Leduc, N. (BE)Celkový počet autorů 12 Zdroj.dok. Plant Physiology. - : Oxford University Press - ISSN 0032-0889
Roč. 172, č. 1 (2016), s. 489-509Poč.str. 21 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova cell-cycle regulation ; pea axillary buds ; oryza-sativa l. ; apical dominance ; rosa sp ; arabidopsis-thaliana ; lateral buds ; meristem activity ; plant-responses ; acts downstream Vědní obor RIV EB - Genetika a molekulární biologie CEP LO1204 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LK21306 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UEB-Q - RVO:61389030 UT WOS 000388451900037 DOI 10.1104/pp.16.00530 Anotace Bud outgrowth is controlled by environmental and endogenous factors. Through the use of the photosynthesis inhibitor norflurazon and of masking experiments, evidence is given here that light acts mainly as a morphogenic signal in the triggering of bud outgrowth and that initial steps in the light signaling pathway involve cytokinins (CKs). Indeed, in rose (Rosa hybrida), inhibition of bud outgrowth by darkness is suppressed solely by the application of CKs. In contrast, application of sugars has a limited effect. Exposure of plants to white light (WL) induces a rapid (after 3-6 h of WL exposure) up-regulation of CK synthesis (RhIPT3 and RhIPT5), of CK activation (RhLOG8), and of CK putative transporter RhPUP5 genes and to the repression of the CK degradation RhCKX1 gene in the node. This leads to the accumulation of CKs in the node within 6 h and in the bud at 24 h and to the triggering of bud outgrowth. Molecular analysis of genes involved in major mechanisms of bud outgrowth (strigolactone signaling [RwMAX2], metabolism and transport of auxin [RhPIN1, RhYUC1, and RhTAR1], regulation of sugar sink strength [RhVI, RhSUSY, RhSUC2, and RhSWEET10], and cell division and expansion [RhEXP and RhPCNA]) reveal that, when supplied in darkness, CKs up-regulate their expression as rapidly and as intensely as WL. Additionally, up-regulation of CKs by WL promotes xylem flux toward the bud, as evidenced by Methylene Blue accumulation in the bud after CK treatment in the dark. Altogether, these results suggest that CKs are initial components of the light signaling pathway that controls the initiation of bud outgrowth. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2017
Počet záznamů: 1