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Metabolites
Special Issues
Hormone Metabolism and Signaling in Plants
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Hormone Metabolism and Signaling in Plants

A special issue of Metabolites (ISSN 2218-1989). This special issue belongs to the section "Plant Metabolism".

Deadline for manuscript submissions: closed (1 October 2023) | Viewed by 5672

Special Issue Editors

Dr. Martin Raspor

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Guest Editor
Department of Plant Physiology, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Belgrade, Serbia
Interests: abscisic acid metabolism and signaling; auxin metabolism and signaling; cytokinin metabolism and signaling; nutrient uptake; plant hormonomics; plant nutrition; plant stress; rhizosphere
Dr. Tatjana Ćosić

E-Mail Website
Guest Editor
Department of Plant Physiology, Institute for Biological Research "Siniša Stanković" - National Institute of Republic of Serbia, University of Belgrade, Belgrade, Serbia
Interests: plant physiology; plant biotechnology; plant molecular biology; plant growth and development; plant hormonomics; hormonal regulations in plants; plant–pathogen interactions

Special Issue Information

Dear Colleagues,

Plants are fascinating living things that, due to their sessile lifestyle, have had to evolve complex and sophisticated mechanisms for the perception of and reaction to stimuli from their environment. Plant hormones, also called phytohormones, are specialized molecules that enable plants to execute complex developmental programs, regulate metabolic processes, and perceive and react to biotic and abiotic environmental stimuli.

Since the mid-20th century, the term “plant hormones” has been used to encompass auxin, cytokinin, abscisic acid, gibberellin, and ethylene, but its meaning has gradually expanded to include novel groups such as jasmonic and salicylic acid, brassinosteroids, strigolactones, and lately even molecules such as melatonin and serotonin. Moreover, some classes of plant hormones such as cytokinins and gibberellins consist of a wide spectrum of precursors, intermediates, and other hormone metabolites—some of them with well-established, proven physiological functions, while others with a biological activity and role that remain ambiguous or unknown.

With the recent expansion of transcriptomics, proteomics, and metabolomics, the diversity of plant hormones and their metabolites has attracted more and more scientific attention. The evolution of sophisticated analytical methods such as HPLC and LC-MS/MS has enabled the expansion of plant hormonomics, a discipline within plant physiology dedicated to the composition and function of phytohormone metabolites within plant tissues. The accounts of the composition of phytohormonomes of various plant species, or of novel phytohormone metabolites and their signaling functions within plants, are growing significantly in number.

Thus, this Special Issue welcomes original research and review articles dedicated to plant hormonomics, focusing on novel discoveries related to plant hormone metabolism, the composition of phytohormonomes in plant species or under treatments where hormonomic research has not been conducted yet so far, or alternatively, on the signaling roles and physiological effects of novel (naturally occurring or synthetic) phytohormone molecules.

Dr. Martin Raspor
Dr. Tatjana Ćosić
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metabolites is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • plant hormonomics
  • phytohormonome
  • plant hormone metabolism
  • phytohormone metabolites
  • phytohormone signaling
  • in vitro and ex vitro plant hormonomics
  • the composition of plant hormonomes in various environmental conditions
  • first reports on hormonomics in plant species or cultivars
  • physiological functions and signaling roles of novel phytohormone metabolites
  • novel genes, enzymes and pathways involved in phytohormone metabolism

Published Papers (2 papers)

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Review

26 pages, 475 KiB  
Review
Cytokinin Translocation to, and Biosynthesis and Metabolism within, Cereal and Legume Seeds: Looking Back to Inform the Future
by Paula E. Jameson
Metabolites 2023, 13(10), 1076; https://doi.org/10.3390/metabo13101076 - 13 Oct 2023
Cited by 1 | Viewed by 992
Abstract
Early in the history of cytokinins, it was clear that Zea mays seeds contained not just trans-zeatin, but its nucleosides and nucleotides. Subsequently, both pods and seeds of legumes and cereal grains have been shown to contain a complex of cytokinin forms. [...] Read more.
Early in the history of cytokinins, it was clear that Zea mays seeds contained not just trans-zeatin, but its nucleosides and nucleotides. Subsequently, both pods and seeds of legumes and cereal grains have been shown to contain a complex of cytokinin forms. Relative to the very high quantities of cytokinin detected in developing seeds, only a limited amount appears to have been translocated from the parent plant. Translocation experiments, and the detection of high levels of endogenous cytokinin in the maternal seed coat tissues of legumes, indicates that cytokinin does not readily cross the maternal/filial boundary, indicating that the filial tissues are autonomous for cytokinin biosynthesis. Within the seed, trans-zeatin plays a key role in sink establishment and it may also contribute to sink strength. The roles, if any, of the other biologically active forms of cytokinin (cis-zeatin, dihydrozeatin and isopentenyladenine) remain to be elucidated. The recent identification of genes coding for the enzyme that leads to the biosynthesis of trans-zeatin in rice (OsCYP735A3 and 4), and the identification of a gene coding for an enzyme (CPN1) that converts trans-zeatin riboside to trans-zeatin in the apoplast, further cements the key role played by trans-zeatin in plants. Full article
(This article belongs to the Special Issue Hormone Metabolism and Signaling in Plants)
36 pages, 4457 KiB  
Review
Biosynthetic Pathways of Hormones in Plants
by Andrzej Bajguz and Alicja Piotrowska-Niczyporuk
Metabolites 2023, 13(8), 884; https://doi.org/10.3390/metabo13080884 - 25 Jul 2023
Cited by 4 | Viewed by 3925
Abstract
Phytohormones exhibit a wide range of chemical structures, though they primarily originate from three key metabolic precursors: amino acids, isoprenoids, and lipids. Specific amino acids, such as tryptophan, methionine, phenylalanine, and arginine, contribute to the production of various phytohormones, including auxins, melatonin, ethylene, [...] Read more.
Phytohormones exhibit a wide range of chemical structures, though they primarily originate from three key metabolic precursors: amino acids, isoprenoids, and lipids. Specific amino acids, such as tryptophan, methionine, phenylalanine, and arginine, contribute to the production of various phytohormones, including auxins, melatonin, ethylene, salicylic acid, and polyamines. Isoprenoids are the foundation of five phytohormone categories: cytokinins, brassinosteroids, gibberellins, abscisic acid, and strigolactones. Furthermore, lipids, i.e., α-linolenic acid, function as a precursor for jasmonic acid. The biosynthesis routes of these different plant hormones are intricately complex. Understanding of these processes can greatly enhance our knowledge of how these hormones regulate plant growth, development, and physiology. This review focuses on detailing the biosynthetic pathways of phytohormones. Full article
(This article belongs to the Special Issue Hormone Metabolism and Signaling in Plants)
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