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ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Physiology
Volume 15 - 2024 |
doi: 10.3389/fpls.2024.1487897
This article is part of the Research Topic From Pathways to Networks: Integration of Phytohormones and Environmental Signals View all 4 articles
Dynamic Changes Of Endogenous Phytohormones And Carbohydrates During Spontaneous Morphogenesis Of Centaurium erythraea Rafn
Provisionally accepted- 1 Siniša Stanković Institute for Biological Research, University of Belgrade, Belgrade, Serbia
- 2 Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Prague, Prague, Czechia
Common centaury (Centaurium eryhtraea Rafn) is a medicinal plant species with vigorous morphogenic potential in vitro. The process of spontaneous shoot regeneration in a solid root culture is characteristic for this plant species. In this context, the aim of this work was to investigate the dynamic changes of endogenous phytohormones and carbohydrates content in root explants at different time points (0, 2, 4, 7, 14, 21, 28, and 60 days) during spontaneous centaury morphogenesis in vitro. Detailed analysis of cytokinins (CKs) showed that trans-zeatin (tZ) was the major bioactive CK at all time points. The corresponding riboside, tZ9R, was also determined in the majority of the identified transport forms, at all time-points. Further analysis of endogenous auxin revealed a significant increase in endogenous indole-3-acetic acid (IAA) after 21 days, when a huge jump in the ratio of IAA/bioactive CKs was also observed. The maximum total soluble sugar content was measured after 14 days, while a significant decrease was determined after 21 days, when the first regenerated adventitious shoots appeared. This undoubtedly indicates an increased energy requirement prior to the actual regeneration of the shoots. The obtained results indicate that the period from day 14 to day 21 involves the most dramatic disturbances in endogenous bioactive CKs, IAA and carbohydrate balance, which are very important and valuable factors for the onset of shoot regeneration.
Keywords: Centaury, Cytokinin, auxin, soluble sugars, Morphogenesis, phytohormone
Received: 28 Aug 2024; Accepted: 18 Oct 2024.
Copyright: © 2024 Trifunović-Momčilov, MOTYKA, Marković, Milovančević, Filipović, Dobrev and Subotić. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Milana Trifunović-Momčilov, Siniša Stanković Institute for Biological Research, University of Belgrade, Belgrade, Serbia
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