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Role of the Ubiquitin System in Plant Stress Responses
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Role of the Ubiquitin System in Plant Stress Responses

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Molecular Biology".

Deadline for manuscript submissions: closed (31 March 2021) | Viewed by 14847

Special Issue Editors

Dr. Irene Serrano

E-Mail Website
Guest Editor
Department of Plant Molecular Biology and Physiology, Schwann-Schleiden Research Center, Albrecht-von-Haller-Institute for Plant Sciences, Georg-August-University of Goettingen, Julia-Lermontowa-Weg 3, 37077 Göttingen, Germany
Interests: biotic and abiotic stress responses; proteostasis; signal transduction
Dr. Ullrich Dubiella

E-Mail Website
Guest Editor
KWS Saat SE & Co. KgaA; Grimsehlstr. 31, 37574 Einbeck, Germany
Interests: biotic and abiotic stress responses; proteostasis; regulation of protein function

Special Issue Information

Dear colleagues,

Sensing of biotic and abiotic stress signals and their transduction into efficient responses are crucial requirements for plant adaptation, reproduction and, ultimately, survival. The initiation of rapid plant responses cannot only be based on the induction of gene expression, and post-translational modifications (PTMs) of proteins enable cells to rapidly and specifically respond to stimuli, avoiding time- and energy-consuming de novo protein synthesis.

Since the discovery of ubiquitin in the late 1970s and the delineation of the ubiquitin proteasome system, an increasing body of evidence has shown that this PTM plays a central role in regulating plant responses to multiple biotic and abiotic stresses. Although the most studied outcome of protein ubiquitination is proteasomal degradation, different ubiquitin modifications provide a much more complex and highly dynamic system. Ubiquitination confers different fates to the target protein depending on the number of ubiquitin molecules that are attached and the location of their attachment. Therefore, it also coordinates the subcellular localization of proteins and regulates protein activity as well as protein–protein interactions.

The aim of this Special Issue is to provide an opportunity to publish research work and review articles related to the role of the ubiquitin regulated pathways in plant stress responses, and to widen our view and understanding of this exciting and important field of research. Articles published in Plants are open access, and will therefore be freely available to anyone who wishes to access them.

Dr. Irene Serrano
Dr. Ullrich Dubiella
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

  • ubiquitination
  • biotic and abiotic stress responses
  • proteostasis
  • regulation of protein function
  • signal transduction

Published Papers (4 papers)

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Review

20 pages, 992 KiB  
Review
Lessons from Comparison of Hypoxia Signaling in Plants and Mammals
by Catherine M. Doorly and Emmanuelle Graciet
Plants 2021, 10(5), 993; https://doi.org/10.3390/plants10050993 - 17 May 2021
Cited by 5 | Viewed by 3009
Abstract
Hypoxia is an important stress for organisms, including plants and mammals. In plants, hypoxia can be the consequence of flooding and causes important crop losses worldwide. In mammals, hypoxia stress may be the result of pathological conditions. Understanding the regulation of responses to [...] Read more.
Hypoxia is an important stress for organisms, including plants and mammals. In plants, hypoxia can be the consequence of flooding and causes important crop losses worldwide. In mammals, hypoxia stress may be the result of pathological conditions. Understanding the regulation of responses to hypoxia offers insights into novel approaches for crop improvement, particularly for the development of flooding-tolerant crops and for producing better therapeutics for hypoxia-related diseases such as inflammation and cancer. Despite their evolutionary distance, plants and mammals deploy strikingly similar mechanisms to sense and respond to the different aspects of hypoxia-related stress, including low oxygen levels and the resulting energy crisis, nutrient depletion, and oxidative stress. Over the last two decades, the ubiquitin/proteasome system and the ubiquitin-like protein SUMO have been identified as key regulators that act in concert to regulate core aspects of responses to hypoxia in plants and mammals. Here, we review ubiquitin and SUMO-dependent mechanisms underlying the regulation of hypoxia response in plants and mammals. By comparing and contrasting these mechanisms in plants and mammals, this review seeks to pinpoint conceptually similar mechanisms but also highlight future avenues of research at the junction between different fields of research. Full article
(This article belongs to the Special Issue Role of the Ubiquitin System in Plant Stress Responses)
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12 pages, 577 KiB  
Review
The Ubiquitin Proteasome System as a Double Agent in Plant-Virus Interactions
by Ullrich Dubiella and Irene Serrano
Plants 2021, 10(5), 928; https://doi.org/10.3390/plants10050928 - 06 May 2021
Cited by 14 | Viewed by 3327
Abstract
The ubiquitin proteasome is a rapid, adaptive mechanism for selective protein degradation, crucial for proper plant growth and development. The ubiquitin proteasome system (UPS) has also been shown to be an integral part of plant responses to stresses, including plant defence against pathogens. [...] Read more.
The ubiquitin proteasome is a rapid, adaptive mechanism for selective protein degradation, crucial for proper plant growth and development. The ubiquitin proteasome system (UPS) has also been shown to be an integral part of plant responses to stresses, including plant defence against pathogens. Recently, significant progress has been made in the understanding of the involvement of the UPS in the signalling and regulation of the interaction between plants and viruses. This review aims to discuss the current knowledge about the response of plant viral infection by the UPS and how the viruses counteract this system, or even use it for their own benefit. Full article
(This article belongs to the Special Issue Role of the Ubiquitin System in Plant Stress Responses)
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21 pages, 3023 KiB  
Review
The Ubiquitin Switch in Plant Stress Response
by Paymon Doroodian and Zhihua Hua
Plants 2021, 10(2), 246; https://doi.org/10.3390/plants10020246 - 27 Jan 2021
Cited by 33 | Viewed by 4362
Abstract
Ubiquitin is a 76 amino acid polypeptide common to all eukaryotic organisms. It functions as a post-translationally modifying mark covalently linked to a large cohort of yet poorly defined protein substrates. The resulting ubiquitylated proteins can rapidly change their activities, cellular localization, or [...] Read more.
Ubiquitin is a 76 amino acid polypeptide common to all eukaryotic organisms. It functions as a post-translationally modifying mark covalently linked to a large cohort of yet poorly defined protein substrates. The resulting ubiquitylated proteins can rapidly change their activities, cellular localization, or turnover through the 26S proteasome if they are no longer needed or are abnormal. Such a selective modification is essential to many signal transduction pathways particularly in those related to stress responses by rapidly enhancing or quenching output. Hence, this modification system, the so-called ubiquitin-26S proteasome system (UPS), has caught the attention in the plant research community over the last two decades for its roles in plant abiotic and biotic stress responses. Through direct or indirect mediation of plant hormones, the UPS selectively degrades key components in stress signaling to either negatively or positively regulate plant response to a given stimulus. As a result, a tightly regulated signaling network has become of much interest over the years. The ever-increasing changes of the global climate require both the development of new crops to cope with rapid changing environment and new knowledge to survey the dynamics of ecosystem. This review examines how the ubiquitin can switch and tune plant stress response and poses potential avenues to further explore this system. Full article
(This article belongs to the Special Issue Role of the Ubiquitin System in Plant Stress Responses)
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14 pages, 1123 KiB  
Review
An Insight into the Factors Influencing Specificity of the SUMO System in Plants
by Moumita Srivastava and Ari Sadanandom
Plants 2020, 9(12), 1788; https://doi.org/10.3390/plants9121788 - 17 Dec 2020
Cited by 10 | Viewed by 3514
Abstract
Due to their sessile nature, plants are constantly subjected to various environmental stresses such as drought, salinity, and pathogen infections. Post-translational modifications (PTMs), like SUMOylation, play a vital role in the regulation of plant responses to their environment. The process of SUMOylation typically [...] Read more.
Due to their sessile nature, plants are constantly subjected to various environmental stresses such as drought, salinity, and pathogen infections. Post-translational modifications (PTMs), like SUMOylation, play a vital role in the regulation of plant responses to their environment. The process of SUMOylation typically involves an enzymatic cascade containing the activation, (E1), conjugation (E2), and ligation (E3) of SUMO to a target protein. Additionally, it also requires a class of SUMO proteases that generate mature SUMO from its precursor and cleave it off the target protein, a process termed deSUMOylation. It is now clear that SUMOylation in plants is key to a plethora of adaptive responses. How this is achieved with an extremely limited set of machinery components is still unclear. One possibility is that novel SUMO components are yet to be discovered. However, current knowledge indicates that only a small set of enzymes seem to be responsible for the modification of a large number of SUMO substrates. It is yet unknown where the specificity lies within the SUMO system. Although this seems to be a crucial question in the field of SUMOylation studies, not much is known about the factors that provide specificity. In this review, we highlight the role of the localisation of SUMO components as an important factor that can play a vital role in contributing to the specificity within the process. This will introduce a new facet to our understanding of the mechanisms underlying such a dynamic process. Full article
(This article belongs to the Special Issue Role of the Ubiquitin System in Plant Stress Responses)
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