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Grira M, Prinsen E, Werbrouck S. New Understanding of Meta-Topolin Riboside Metabolism in Micropropagated Woody Plants. PLANTS (BASEL, SWITZERLAND) 2024; 13:1281. [PMID: 38732496 PMCID: PMC11085518 DOI: 10.3390/plants13091281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 04/27/2024] [Accepted: 05/04/2024] [Indexed: 05/13/2024]
Abstract
Topolin cytokinins have emerged as valuable tools in micropropagation. This study investigates the metabolism of meta-topolin riboside (mTR) in three distinct tree species: Handroanthus guayacan and Tabebuia rosea (Bignoniaceae), and Tectona grandis (Lamiaceae). Employing labeled N15 mTR, we unraveled the complex mechanisms underlying cytokinin homeostasis, identifying N9-glucosylation as the principal deactivation pathway. Our findings demonstrate a capacity in T. rosea and H. guayacan to reposition the hydroxyl group on the cytokinin molecule, a previously unexplored metabolic pathway. Notably, this study reveals remarkable interfamilial and interspecies differences in mTR metabolism, challenging established perspectives on the role of callus tissue in cytokinin storage. These insights not only illuminate the metabolic intricacies of mTR, a cytokinin with interesting applications in plant tissue culture, but also enhances our understanding of cytokinin dynamics in plant systems, thereby enriching the scientific discourse on plant physiology and cytokinin biology.
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Affiliation(s)
- Maroua Grira
- Laboratory for Applied In Vitro Plant Biotechnology, Ghent University, Valentin Vaerwyckweg 1, 9000 Ghent, Belgium
| | - Els Prinsen
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, Groenenborgerlaan 170, 2020 Antwerp, Belgium
| | - Stefaan Werbrouck
- Laboratory for Applied In Vitro Plant Biotechnology, Ghent University, Valentin Vaerwyckweg 1, 9000 Ghent, Belgium
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Mkala EM, Mutinda ES, Wanga VO, Oulo MA, Oluoch WA, nzei J, Waswa EN, Odago W, Nanjala C, Mwachala G, Hu GW, Wang QF. Modeling impacts of climate change on the potential distribution of three endemic Aloe species critically endangered in East Africa. ECOL INFORM 2022. [DOI: 10.1016/j.ecoinf.2022.101765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Mkala EM, Mutinda ES, Wanga VO, Oulo MA, Oluoch WA, nzei J, Waswa EN, Odago W, Nanjala C, Mwachala G, Hu GW, Wang QF. Modeling impacts of climate change on the potential distribution of three endemic Aloe species critically endangered in East Africa. ECOL INFORM 2022; 71:101765. [DOI: https:/doi.org/10.1016/j.ecoinf.2022.101765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
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Chaves MC, Freitas JCE, Nery FC, Paiva R, Prudente DDO, Costa BGP, Daubermann AG, Bernardes MM, Grazul RM. Influence of colorful light-emitting diodes on growth, biochemistry, and production of volatile organic compounds in vitro of Lippia filifolia (Verbenaceae). JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2020; 212:112040. [PMID: 32987263 DOI: 10.1016/j.jphotobiol.2020.112040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/13/2020] [Accepted: 09/21/2020] [Indexed: 10/23/2022]
Abstract
Lippia filifolia Mart. & Schauer belongs to the Verbenaceae family and it is endemic from the rupestrian fields of the Espinhaço mountain range, located in Minas Gerais, Brazil. It is an aromatic species with medicinal potential due to the production of volatile compounds that constitute its essential oil. The objective of this work was to evaluate the effects of light quality using light-emitting diodes (LEDs) over the growth of L. filifolia grown in vitro after 45 days of culture, analyzing its volatile organic compounds (VOCs), biochemical, and biometric traits. This study had four treatments according to the wavelength of LED lamps: (i) white (control), (ii) blue, (iii) red, and (iv) a combination of red + blue (mix). The light quality influenced the growth, metabolism, and VOCs production of plantlets. The specimens showed higher height under red and white treatments and higher biomass accumulation, nodal segments, and shoot numbers under the mix treatment. Higher total carbohydrate content was also observed on the mix treatment, while the white LED provided higher chlorophylls and carotenoids contents. In addition, the lipid peroxidation was more pronounced in mix and white LEDs treatments, and it was also observed significant but not quite changes in VOCs profiles due to light quality. Eucalyptol was the compound found in a higher concentration among the VOCs of L. filifolia grown in vitro at all light quality treatments studied.
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Affiliation(s)
| | | | - Fernanda Carlota Nery
- Universidade Federal de São João del-Rei, Departamento de Engenharia de Biossistemas, São João del-Rei, MG, Brasil.
| | - Renato Paiva
- Universidade Federal de Lavras, Departamento de Biologia, Lavras, MG, Brasil
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