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Antioxidants
Special Issues
Antioxidant Networks in Seed and Bud Dormancy
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Antioxidant Networks in Seed and Bud Dormancy

A special issue of Antioxidants (ISSN 2076-3921). This special issue belongs to the section "ROS, RNS and RSS".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 10340

Special Issue Editors

Dr. José Antonio Hernández Cortés

E-Mail Website1 Website2
Guest Editor
Group of Fruit Biotechnology, Department of Fruit Breeding, CEBAS-CSIC, P.O. Box 164, 30100 Murcia, Spain
Interests: antioxidant systems; ASC-GSH cycle; hormone profile; hydrogen peroxide; reactive oxygen species; redox signaling; proteomic; seed biology; seed dormancy
Special Issues, Collections and Topics in MDPI journals
Dr. Gregorio Barba-Espín

E-Mail Website
Guest Editor
Centro de Edafología y Biología Aplicada del Segura, CSIC, Grupo de Biotecnología de Frutales, Departamento de Mejora Vegetal, E-30100 Murcia, Spain
Interests: plant biotechnology and breeding; crop management; plant biotechnology; antioxidant metabolism, proteomics, molecular biology in numerous plant species
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Dormancy is an intricate mechanism by which higher plants are able to survive adverse environmental conditions by suspending growth and development in organs like seeds and buds. Dormancy is controlled by both environmental and genetic factors. In order to establish seedlings at the right time, the seeds of most plant species have developed the ability to synchronize their germination. This is controlled by seed dormancy, defined as the incapacity of an undamaged viable seed to complete the germination process, even under favorable conditions. Bud dormancy in woody plants is a physiological stage that enables plants to survive long periods under adverse conditions, and is characterized by growth cessation, arrest of cell division, and reduced metabolic and respiratory activities. Dormancy is particularly important to prevent germination and flowering processes during short periods of optimal conditions in an adverse season for plant growth.

The induction and release of dormancy are controlled by various regulators, such as plant hormones, sugars, redox signals, and dormancy proteins. Recent works have reported that oxidative and redox signals are crucial for the alleviation of dormancy in different plant species. More specifically, authors have demonstrated how reactive oxygen species such as H2O2 can modulate seed germination as well as bud dormancy release.

It is well known that plant hormones play a role in the regulation of seed germination, bud induction, and dormancy release, although both ABA and GAs focus the plant hormone research in the dormancy topic. In addition, other hormones including ethylene, brassinosteroids, auxin, and cytokinins have also been proposed to affect seed or bud dormancy processes. Besides plant hormones or oxidative signals, sugars can also act as signaling molecules in different plant developmental processes, and sugar–hormone crosstalk has been reported.

Recently, a number of transcriptomic analyses have contributed to reveal the gene regulatory networks of dormancy, and several conserved pathways have been identified. However, remarkable differences have been found within species, and the identification of the underlying genes that specifically regulate dormancy—including the involvement of epigenetic modifications—needs further clarification.

The aim and scope of this Special Issue is to encourage the publication of reviews and/or experimental research dealing with physiological, biochemical, and molecular aspects related to the control of seed and bud dormancy. 

Dr. José Antonio Hernandez Cortes
Dr. Gregorio Barba-Espín
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. Antioxidants 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 2900 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

  • Antioxidant systems
  • ASC–GSH cycle
  • Carbohydrate metabolism
  • Gene expression
  • Metabolomics
  • Oxidative stress
  • Plant hormones
  • Proteomic
  • Redox signaling
  • Sugar metabolism

Published Papers (3 papers)

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Research

16 pages, 3420 KiB  
Article
Changes in Reactive Oxygen Species, Antioxidants and Carbohydrate Metabolism in Relation to Dormancy Transition and Bud Break in Apple (Malus × domestica Borkh) Cultivars
by Sangeeta Sapkota, Jianyang Liu, Md Tabibul Islam and Sherif M. Sherif
Antioxidants 2021, 10(10), 1549; https://doi.org/10.3390/antiox10101549 - 29 Sep 2021
Cited by 14 | Viewed by 3236
Abstract
Understanding the biochemical mechanisms underlying bud dormancy and bloom time regulation in deciduous woody perennials is critical for devising effective strategies to protect these species from spring frost damage. This study investigated the accumulation profiles of carbohydrates, ROS and antioxidants during dormancy in [...] Read more.
Understanding the biochemical mechanisms underlying bud dormancy and bloom time regulation in deciduous woody perennials is critical for devising effective strategies to protect these species from spring frost damage. This study investigated the accumulation profiles of carbohydrates, ROS and antioxidants during dormancy in ‘Cripps Pink’ and ‘Honeycrisp’, two apple cultivars representing the early and late bloom cultivars, respectively. Our data showed that starch levels generally declined during dormancy, whereas soluble sugars increased. However, the present study did not record significant alternations in the carbohydrate accumulation profiles between the two cultivars that could account for the differences in their bloom dates. On the other hand, H2O2 accumulation patterns revealed an apparent correlation with the dormancy stage and bloom dates in both cultivars; peaking early in the early-blooming cultivar, sustaining high levels for a longer time in the late-blooming cultivars, and fading by the time of bud burst in both cultivars. Also, the redox balance during dormancy appeared to be maintained mainly by catalase and, to a lesser extent, by glutathione (GSH). Overall, the present study concludes that differences in ROS and the bud redox balance could, at least partially, explain the differences in dormancy duration and bloom date among apple cultivars. Full article
(This article belongs to the Special Issue Antioxidant Networks in Seed and Bud Dormancy)
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14 pages, 2907 KiB  
Article
Hydrogen Peroxide Increases during Endodormancy and Decreases during Budbreak in Grapevine (Vitis vinifera L.) Buds
by Francisco Javier Pérez, Ximena Noriega and Sebastián Rubio
Antioxidants 2021, 10(6), 873; https://doi.org/10.3390/antiox10060873 - 29 May 2021
Cited by 6 | Viewed by 2757
Abstract
Changes in the level of hydrogen peroxide (H2O2) is a good indicator to monitor fluctuations in cellular metabolism and in the stress responses. In this study, the changes in H2O2 content during bud endodormancy (ED) and [...] Read more.
Changes in the level of hydrogen peroxide (H2O2) is a good indicator to monitor fluctuations in cellular metabolism and in the stress responses. In this study, the changes in H2O2 content during bud endodormancy (ED) and budbreak were analysed in grapevine (Vitis vinifera L.). The results showed a gradual increase in the H2O2 content during the development of bud ED, which was mainly due to an increase in the activity of peroxidases (PODs). The maximum H2O2 content reached in the grapevine buds coincided with the maximum depth of bud ED. In contrast, during budbreak, the H2O2 content decreased. As the plant hormones cytokinin (CK) and auxin play an important role in budbreak and growth resumption in grapevine, the effect of exogenous applications of H2O2 on the expression of genes involved in CK and auxin metabolism was analysed. The results showed that H2O2 represses the expression of the CK biosynthesis genes VvIPT3a and VvLOG1 and induces the expression of the CK-inactivating gene VvCKX3, thus reducing potentially the CK content in the grapevine bud. On the other hand, H2O2 induced the expression of the auxin biosynthesis genes VvAMI1 and VvYUC3 and of the auxin transporter gene VvPIN3, thus increasing potentially the auxin content and auxin transport in grapevine buds. In general, the results suggest that H2O2 in grapevine buds is associated with the depth of ED and negatively regulates its budbreak. Full article
(This article belongs to the Special Issue Antioxidant Networks in Seed and Bud Dormancy)
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22 pages, 1908 KiB  
Article
Interplay among Antioxidant System, Hormone Profile and Carbohydrate Metabolism during Bud Dormancy Breaking in a High-Chill Peach Variety
by José A. Hernández, Pedro Díaz-Vivancos, José Ramón Acosta-Motos, Nuria Alburquerque, Domingo Martínez, Esther Carrera, Jesús García-Bruntón and Gregorio Barba-Espín
Antioxidants 2021, 10(4), 560; https://doi.org/10.3390/antiox10040560 - 04 Apr 2021
Cited by 16 | Viewed by 3284
Abstract
(1) Background: Prunus species have the ability to suspend (induce dormancy) and restart growth, in an intricate process in which environmental and physiological factors interact. (2) Methods: In this work, we studied the evolution of sugars, antioxidant metabolism, and abscisic acid (ABA) and [...] Read more.
(1) Background: Prunus species have the ability to suspend (induce dormancy) and restart growth, in an intricate process in which environmental and physiological factors interact. (2) Methods: In this work, we studied the evolution of sugars, antioxidant metabolism, and abscisic acid (ABA) and gibberellins (GAs) levels during bud dormancy evolution in a high-chill peach variety, grown for two seasons in two different geographical areas with different annual media temperature, a cold (CA) and a temperate area (TA). (3) Results: In both areas, starch content reached a peak at ecodormancy, and then decreased at dormancy release (DR). Sorbitol and sucrose declined at DR, mainly in the CA. In contrast, glucose and fructose levels progressively rose until DR. A decline in ascorbate peroxidase, dehydroascorbate reductase, superoxide dismutase and catalase activities occurred in both seasons at DR. Moreover, the H2O2-sensitive SOD isoenzymes, Fe-SOD and Cu,Zn-SOD, and two novel peroxidase isoenzymes, were detected. Overall, these results suggest the occurrence of a controlled oxidative stress during DR. GA7 was the major bioactive GA in both areas, the evolution of its levels being different between seasons and areas. In contrast, ABA content decreased during the dormancy period in both areas, resulting in a reduction in the ABA/total GAs ratio, being more evident in the CA. (4) Conclusion: A possible interaction sugars-hormones-ROS could take place in high-chill peach buds, favoring the DR process, suggesting that, in addition to sugar metabolism, redox interactions can govern bud DR, regardless of chilling requirements. Full article
(This article belongs to the Special Issue Antioxidant Networks in Seed and Bud Dormancy)
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