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Biomolecules
Special Issues
Advances in Molecular Biology of Action of Auxins
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Advances in Molecular Biology of Action of Auxins

A special issue of Biomolecules (ISSN 2218-273X).

Deadline for manuscript submissions: closed (31 January 2020) | Viewed by 27156

Special Issue Editors

Prof. Dr. Steffen Vanneste

E-Mail Website
Guest Editor
Department of Plant Biotechnology and Bioinformatics, Ghent University, 9000 Ghent, Belgium
VIB Center for Plant Systems Biology, VIB, 9000 Ghent, Belgium
Interests: auxin signalling; auxin transport; cell biology; root development; Calcium
Dr. Peter Grones

E-Mail Website
Assistant Guest Editor
VIB-UGent Center for Plant Systems Biology, Ghent University, 9000 Ghent, Belgium;Technologiepark-Zwijnaarde 71, 9052 Ghent, Belgium
Interests: auxin signaling; auxin transport; cell biology; cell wall; endocytosis

Special Issue Information

Dear Colleagues,

The plant hormone auxin acts as a general coordinator of plant growth and development by controlling numerous developmental processes as apical dominance, embryo development, vascular patterning or abscission. The polar auxin transport machinery mediates differences in auxin distribution within tissues, and cellular auxin responses occur depending on changes in cellular auxin levels. The majority of cellular responses is represented by modulation of the expression of wide range of genes that consequently influence development. In this Special issue, we will focus on auxin and its fundamental action on plant growth and development. We encourage researchers to submit recent studies unravelling novel aspects of auxin transport, metabolism, perception, and signaling.

Prof. Steffen Vanneste
Dr. Peter Grones
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. Biomolecules 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

  • Auxin signaling
  • Auxin transport
  • Auxin conjugation
  • Auxin catabolism
  • Auxin biosynthesis
  • Cross-talk

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Published Papers (4 papers)

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Research

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11 pages, 2409 KiB  
Article
Two Auxin Response Elements Fine-Tune PINOID Expression During Gynoecium Development in Arabidopsis thaliana
by André Kuhn, Bethany Runciman, William Tasker-Brown and Lars Østergaard
Biomolecules 2019, 9(10), 526; https://doi.org/10.3390/biom9100526 - 25 Sep 2019
Cited by 6 | Viewed by 3940
Abstract
The plant hormone auxin controls almost all aspects of plant development through the gene regulatory properties of auxin response factors (ARFs) which bind so-called auxin responsive elements (AuxREs) in regulatory regions of their target genes. It has been proposed that ARFs interact and [...] Read more.
The plant hormone auxin controls almost all aspects of plant development through the gene regulatory properties of auxin response factors (ARFs) which bind so-called auxin responsive elements (AuxREs) in regulatory regions of their target genes. It has been proposed that ARFs interact and cooperate with other transcription factors (TFs) to bind to complex DNA-binding sites harboring cis-elements for several TFs. Complex DNA-binding sites have not been studied systematically for ARF target genes. ETTIN (ETT; ARF3) is a key regulator of gynoecium development. Cooperatively with its interacting partner INDEHISCENT (IND), ETT regulates PINOID (PID), a gene involved in the regulation gynoecium apical development (style development). Here, we mutated two ETT-bound AuxREs within the PID promoter and observed increased style length in gynoecia of plants carrying mutated promoter variants. Furthermore, mutating the AuxREs led to ectopic repression of PID in one developmental context while leading to ectopically upregulated PID expression in another stage. Our data also show that IND associates with the PID promoter in an auxin-sensitive manner. In summary, we demonstrate that targeted mutations of cis-regulatory elements can be used to dissect the importance of single cis-regulatory elements within complex regulatory regions supporting the importance of the ETT-IND interaction for PID regulation. At the same time, our work also highlights the challenges of such studies, as gene regulation is highly robust, and mutations within gene regulatory regions may only display subtle phenotypes. Full article
(This article belongs to the Special Issue Advances in Molecular Biology of Action of Auxins)
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Review

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15 pages, 1488 KiB  
Review
Auxin-Abscisic Acid Interactions in Plant Growth and Development
by Ryan J. Emenecker and Lucia C. Strader
Biomolecules 2020, 10(2), 281; https://doi.org/10.3390/biom10020281 - 12 Feb 2020
Cited by 109 | Viewed by 10644
Abstract
Plant hormones regulate many aspects of plant growth, development, and response to biotic and abiotic stress. Much research has gone into our understanding of individual plant hormones, focusing primarily on their mechanisms of action and the processes that they regulate. However, recent research [...] Read more.
Plant hormones regulate many aspects of plant growth, development, and response to biotic and abiotic stress. Much research has gone into our understanding of individual plant hormones, focusing primarily on their mechanisms of action and the processes that they regulate. However, recent research has begun to focus on a more complex problem; how various plant hormones work together to regulate growth and developmental processes. In this review, we focus on two phytohormones, abscisic acid (ABA) and auxin. We begin with brief overviews of the hormones individually, followed by in depth analyses of interactions between auxin and ABA, focusing on interactions in individual tissues and how these interactions are occurring where possible. Finally, we end with a brief discussion and future prospects for the field. Full article
(This article belongs to the Special Issue Advances in Molecular Biology of Action of Auxins)
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12 pages, 631 KiB  
Review
Epigenetic Regulation of Auxin Homeostasis
by Eduardo Mateo-Bonmatí, Rubén Casanova-Sáez and Karin Ljung
Biomolecules 2019, 9(10), 623; https://doi.org/10.3390/biom9100623 - 18 Oct 2019
Cited by 24 | Viewed by 6031
Abstract
Epigenetic regulation involves a myriad of mechanisms that regulate the expression of loci without altering the DNA sequence. These different mechanisms primarily result in modifications of the chromatin topology or DNA chemical structure that can be heritable or transient as a dynamic response [...] Read more.
Epigenetic regulation involves a myriad of mechanisms that regulate the expression of loci without altering the DNA sequence. These different mechanisms primarily result in modifications of the chromatin topology or DNA chemical structure that can be heritable or transient as a dynamic response to environmental cues. The phytohormone auxin plays an important role in almost every aspect of plant life via gradient formation. Auxin maxima/minima result from a complex balance of metabolism, transport, and signaling. Although epigenetic regulation of gene expression during development has been known for decades, the specific mechanisms behind the spatiotemporal dynamics of auxin levels in plants are only just being elucidated. In this review, we gather current knowledge on the epigenetic mechanisms regulating the expression of genes for indole-3-acetic acid (IAA) metabolism and transport in Arabidopsis and discuss future perspectives of this emerging field. Full article
(This article belongs to the Special Issue Advances in Molecular Biology of Action of Auxins)
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Other

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7 pages, 1042 KiB  
Brief Report
PIN2 Polarity Establishment in Arabidopsis in the Absence of an Intact Cytoskeleton
by Matouš Glanc, Matyáš Fendrych and Jiří Friml
Biomolecules 2019, 9(6), 222; https://doi.org/10.3390/biom9060222 - 7 Jun 2019
Cited by 14 | Viewed by 5742
Abstract
Cell polarity is crucial for the coordinated development of all multicellular organisms. In plants, this is exemplified by the PIN-FORMED (PIN) efflux carriers of the phytohormone auxin: The polar subcellular localization of the PINs is instructive to the directional intercellular auxin transport, and [...] Read more.
Cell polarity is crucial for the coordinated development of all multicellular organisms. In plants, this is exemplified by the PIN-FORMED (PIN) efflux carriers of the phytohormone auxin: The polar subcellular localization of the PINs is instructive to the directional intercellular auxin transport, and thus to a plethora of auxin-regulated growth and developmental processes. Despite its importance, the regulation of PIN polar subcellular localization remains poorly understood. Here, we have employed advanced live-cell imaging techniques to study the roles of microtubules and actin microfilaments in the establishment of apical polar localization of PIN2 in the epidermis of the Arabidopsis root meristem. We report that apical PIN2 polarity requires neither intact actin microfilaments nor microtubules, suggesting that the primary spatial cue for polar PIN distribution is likely independent of cytoskeleton-guided endomembrane trafficking. Full article
(This article belongs to the Special Issue Advances in Molecular Biology of Action of Auxins)
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