Počet záznamů: 1
Cytokinin, auxin and physiological polarity in the aquatic carnivorous plants Aldrovanda vesiculosa and Utricularia australis
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SYSNO ASEP 0461643 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Cytokinin, auxin and physiological polarity in the aquatic carnivorous plants Aldrovanda vesiculosa and Utricularia australis Tvůrce(i) Šimura, Jan (UEB-Q) ORCID, RID
Spíchal, Lukáš (UEB-Q) RID, ORCID
Adamec, Lubomír (BU-J) RID, ORCID
Pěnčík, A. (CZ)
Rolčík, Jakub (UEB-Q)
Novák, Ondřej (UEB-Q) RID, ORCID, SAI
Strnad, Miroslav (UEB-Q) RID, ORCIDZdroj.dok. Annals of Botany. - : Oxford University Press - ISSN 0305-7364
Roč. 117, č. 6 (2016), s. 1037-1044Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Auxin ; Aldrovanda vesiculosa ; cytokinin Vědní obor RIV EF - Botanika Obor OECD Plant sciences, botany CEP LO1204 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LK21306 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UEB-Q - RVO:61389030 ; BU-J - RVO:67985939 UT WOS 000376655400008 EID SCOPUS 84971554682 DOI 10.1093/aob/mcw020 Anotace Methods The main auxin and cytokinin metabolites in separated shoot segments and turions of two carnivorous plants, Aldrovanda vesiculosa and Utricularia australis, were analysed using ultra-high-performance liquid chromatography coupled with triple quad mass spectrometry.
Key Results In both species, only isoprenoid cytokinins were identified. Zeatin cytokinins predominated in the apical parts, with their concentrations decreasing basipetally, and the trans isomer predominated in A. vesiculosa whereas the cis form was more abundant in U australis. Isopentenyladenine-type cytokinins, in contrast, increased basipetally. Conjugated cytokinin metabolites, the O-glucosides, were present at high concentrations in A. vesiculosa but only in minute amounts in U. australis. N-9-glucoside forms were detected only in U. australis, with isopentenyladenine-9-glucoside (iP9G) being most abundant. In addition to free indole-3-acetic acid (IAA), indole-3-acetamide (IAM), IAA-aspartate (IAAsp), IAA-glutamate (IAGlu) and IAA-glycine (IAGly) conjugates were identified.
Conclusions Both species show common trends in auxin and cytokinin levels, the apical localization of the cytokinin biosynthesis and basipetal change in the ratio of active cytokinins to auxin, in favour of auxin. However, our detailed study of cytokinin metabolic profiles also revealed that both species developed different regulatory mechanisms of active cytokinin content; on the level of their degradation, in U. australis, or in the biosynthesis itself, in the case of A. vesiculosa. Results indicate that the rapid turnover of these signalling molecules along the shoots is essential for maintaining the dynamic balance between the rapid polar growth and development of the apical parts and senescence of the older, basal parts of the shoots.Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2017
Počet záznamů: 1