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Plant Meristems:The Cradle of Life
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Plant Meristems:The Cradle of Life

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Development and Morphogenesis".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 3629

Special Issue Editors

Dr. Maria Lebedeva

E-Mail Website
Guest Editor
Department of Genetics and Biotechnology, Saint Petersburg (ex Leningrad), Russia
Interests: gene expression; molecular biology
Special Issues, Collections and Topics in MDPI journals
Dr. Irina Dodueva

E-Mail Website
Guest Editor
Department of Genetics and Biotechnology, Saint Petersburg State University, 199034 Saint Petersburg, Russia
Interests: plant development; phytohormones; secondary growth; cytokinin; plant tumors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Characteristics of plant development, such as their capacity to generate new organs post‐embryonically, their high regenerative ability, and their large variability in body architecture, are achieved through the activity of plant meristems. According to their localization, meristems are classified into apical (SAM in the shoots and RAM in the roots), lateral (cambium, pericycle, cork cambium), intercalary (meristematic tissue of internodes), and marginal (meristems of the edges of leaf blades) meristems. The structural organization differs in different types of meristems. For example, apical meristems are located at the growing tip of stems and roots, while lateral meristems can be represented by extended strands or massive cylindrical layers stretched over the entire plant body. Regardless of the anatomy, two main functions are supported by meristems: to provide new cells for new tissues and organs and to maintain a population of stem cells in order to maintain or perpetually renew itself during the life of the plant. Meristems first appeared in bryophytes and, in most non-seed plants, they represent the only pluripotent cell present in both gametophyte and sporophyte generations. Meristems of seed plants typically contain niches of pluripotent stem cells in the center and differentiation zones on the periphery. Meristem activity and maintenance are regulated by a set of genes, which demonstrate different expression patterns in different zones of meristems. Among them, the WOX-CLAVATA gene module regulates the activity of the stem cell population in different types of meristems. It includes the component of signaling cascades, the CLE peptides and their receptors, as well as their target genes of the WOX family encoding transcription factors crucial for meristem maintenance. In addition to this, cytokinins, auxins, and other phytohormones are responsible for the regulation of cell proliferation and differentiation in plant meristems.

This Special Issue of Plants aims to highlight different aspects of meristem organization and activity and regulatory mechanisms underlying their development and maintenance in plants, including phytohormones, transcription factors, and components of signaling pathways regulating cell proliferation and differentiation within plant meristems.

Dr. Maria Lebedeva
Dr. Irina Dodueva
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. Plants is an international peer-reviewed open access semimonthly 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

  • meristems
  • plant development
  • stem cells
  • cell proliferation and differentiation
  • WOX
  • CLAVATA
  • transcription factors
  • hormones
  • regulatory networks

Published Papers (3 papers)

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Research

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12 pages, 1205 KiB  
Article
MtWOX2 and MtWOX9-1 Effects on the Embryogenic Callus Transcriptome in Medicago truncatula
by Elizaveta Y. Krasnoperova, Varvara E. Tvorogova, Kirill V. Smirnov, Elena P. Efremova, Elina A. Potsenkovskaia, Anastasia M. Artemiuk, Zakhar S. Konstantinov, Veronika Y. Simonova, Anna V. Brynchikova, Daria V. Yakovleva, Daria B. Pavlova and Ludmila A. Lutova
Plants 2024, 13(1), 102; https://doi.org/10.3390/plants13010102 - 28 Dec 2023
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Abstract
WOX family transcription factors are well-known regulators of plant development, controlling cell proliferation and differentiation in diverse organs and tissues. Several WOX genes have been shown to participate in regeneration processes which take place in plant cell cultures in vitro, but the effects [...] Read more.
WOX family transcription factors are well-known regulators of plant development, controlling cell proliferation and differentiation in diverse organs and tissues. Several WOX genes have been shown to participate in regeneration processes which take place in plant cell cultures in vitro, but the effects of most of them on tissue culture development have not been discovered yet. In this study, we evaluated the effects of MtWOX2 gene overexpression on the embryogenic callus development and transcriptomic state in Medicago truncatula. According to our results, overexpression of MtWOX2 leads to an increase in callus weight. Furthermore, transcriptomic changes in MtWOX2 overexpressing calli are, to a large extent, opposite to the changes caused by overexpression of MtWOX9-1, a somatic embryogenesis stimulator. These results add new information about the mechanisms of interaction between different WOX genes and can be useful for the search of new regeneration regulators. Full article
(This article belongs to the Special Issue Plant Meristems:The Cradle of Life)
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10 pages, 6544 KiB  
Article
Nitrogen-Activated CLV3/ESR-Related 4 (CLE4) Regulates Shoot, Root, and Stolon Growth in Potato
by Maria S. Gancheva and Lyudmila A. Lutova
Plants 2023, 12(19), 3468; https://doi.org/10.3390/plants12193468 - 3 Oct 2023
Cited by 2 | Viewed by 1045
Abstract
In potato, high levels of nitrogen (N) can lead to excessive vegetative growth at the expense of tuber development, resulting in lower yield and poor-quality tubers. We found that Solanum tuberosum CLE4 (StCLE4) is expressed most strongly in the roots grown in [...] Read more.
In potato, high levels of nitrogen (N) can lead to excessive vegetative growth at the expense of tuber development, resulting in lower yield and poor-quality tubers. We found that Solanum tuberosum CLE4 (StCLE4) is expressed most strongly in the roots grown in N-rich media, and it positively regulates potato root growth under N-deficient conditions. We noted that StCLE4 functions as a negative regulator of normal shoot apex development similar to CLV3 in Arabidopsis. Transcriptomic analysis revealed that overexpression of StCLE4 resulted in the repression of the StIT1 gene, a regulator of potato tuber initiation. StCLE4-overexpressing stolons were converted into branches, that were similar to a mild phenotype of the it1 (identity of tuber 1) mutant. We also found that NIN-like proteins, key regulators of nitrate signaling bind to the regulatory sequence of StIT1 in a yeast one-hybrid assay. Taken together, our findings suggest that StCLE4 regulates shoot, root, and stolon growth in potato. Full article
(This article belongs to the Special Issue Plant Meristems:The Cradle of Life)
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Review

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40 pages, 2126 KiB  
Review
Functional Modules in the Meristems: “Tinkering” in Action
by Ksenia Kuznetsova, Elena Efremova, Irina Dodueva, Maria Lebedeva and Ludmila Lutova
Plants 2023, 12(20), 3661; https://doi.org/10.3390/plants12203661 - 23 Oct 2023
Cited by 2 | Viewed by 1350
Abstract
Background: A feature of higher plants is the modular principle of body organisation. One of these conservative morphological modules that regulate plant growth, histogenesis and organogenesis is meristems—structures that contain pools of stem cells and are generally organised according to a common principle. [...] Read more.
Background: A feature of higher plants is the modular principle of body organisation. One of these conservative morphological modules that regulate plant growth, histogenesis and organogenesis is meristems—structures that contain pools of stem cells and are generally organised according to a common principle. Basic content: The development of meristems is under the regulation of molecular modules that contain conservative interacting components and modulate the expression of target genes depending on the developmental context. In this review, we focus on two molecular modules that act in different types of meristems. The WOX-CLAVATA module, which includes the peptide ligand, its receptor and the target transcription factor, is responsible for the formation and control of the activity of all meristem types studied, but it has its own peculiarities in different meristems. Another regulatory module is the so-called florigen-activated complex, which is responsible for the phase transition in the shoot vegetative meristem (e.g., from the vegetative shoot apical meristem to the inflorescence meristem). Conclusions: The review considers the composition and functions of these two functional modules in different developmental programmes, as well as their appearance, evolution and use in plant breeding. Full article
(This article belongs to the Special Issue Plant Meristems:The Cradle of Life)
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