Cytokinins and auxins in organs of aquatic carnivorous plants: what do they reflect?

0569001 - BÚ 2023 RIV GB eng J - Článek v odborném periodiku
Adamec, Lubomír - Plačková, Lenka - Doležal, Karel
Cytokinins and auxins in organs of aquatic carnivorous plants: what do they reflect?
Annals of Botany. Roč. 130, č. 6 (2022), s. 869-882. ISSN 0305-7364. E-ISSN 1095-8290
Grant CEP: GA MŠMT(CZ) EF16_019/0000827
Institucionální podpora: RVO:67985939 ; RVO:61389030
Klíčová slova: Phytohormone profiles * Utricularia spp. * Aldrovanda vesiculosa
Obor OECD: Plant sciences, botany
Impakt faktor: 4.2, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1093/aob/mcac122

The aim was to analyse auxin and cytokinin metabolites in traps, leaves/shoots and shoot apices in several species of genera Aldrovanda and Utricularia to elucidate how the
hormonal profiles reflect the specific organ functions and polarity. The main auxin and cytokinin metabolites were analysed in miniature samples of different organs of Aldrovanda vesiculosa and six Utricularia species. Total contents of biologically active forms (free bases, ribosides) of all four main endogenously occurring cytokinin types were consistently higher in traps than in leaves in four Utricularia species with monomorphic shoots and/or higher than in shoots in two Utricularia species with dimorphic shoots. In Aldrovanda traps,
the total content of different cytokinin forms was similar to or lower than that in shoots. In U. australis leaves, feeding on prey increased all cytokinin forms, while no consistent differences occurred in Aldrovanda. In four aquatic Utricularia species with monomorphic shoots, the content of four auxin forms was usually higher in traps than in leaves. Zero IAA content was determined in U. australis leaves from a meso-eutrophic site or when prey-fed. Different cytokinin and auxin profiles estimated in traps and leaves/shoots of aquatic carnivorous plants indicate an association with different dominant functions of these organs: nutrient uptake by traps versus photosynthetic function of traps. Interplay of cytokinins and auxins regulates apical dominance in these plants possessing strong polarity.
Trvalý link: https://hdl.handle.net/11104/0340260