Reactive Oxygen and Nitrogen Species in Plants―2nd Edition

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

Deadline for manuscript submissions: 15 July 2025 | Viewed by 2756

Special Issue Editors


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Guest Editor

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Guest Editor
Department of Plant Nutrition, Center of Efaphology and Applied Biology of Segura (CEBAS), Spanish National Research Council (CSIC), 30100 Murcia, Spain
Interests: abiotic stress; stress combination; NO; ROS; melatonin; transcriptomics; metabolomics; proteomics; system biology

Special Issue Information

Dear Colleagues,

The metabolism of reactive oxygen and nitrogen species (ROS and RNS) has acquired outstanding relevance in higher plant physiology due to its broad implications in the metabolism of higher plants. Previously, some of these ROS/RNS were considered toxic because they could cause nitro-oxidative damage; however, this concept has evolved since they also exert signaling functions among themselves and with other regulators (phytohormones, melatonin, hydrogen sulfide, etc.) involved in many physiology processes ranging from seed germination to fruit ripening. Likewise, ROS and RNS are also involved in the mechanisms of response against biotic and abiotic stresses.

This 2nd edition of the Special Issue entitled “Reactive Oxygen and Nitrogen Species in Plants” desires to extend the relevance of these families of molecules related to hydrogen peroxide (H2O2) and nitric oxide (NO) which other molecules such as hydrogen sulfide (H2S) and melatonin that have been shown to have close relationships. Therefore, all manuscripts that provide new insights in this area of research are welcome, including original research and reviews, as well as new hypotheses.

Prof. Dr. Francisco J. Corpas
Dr. Rosa M. Rivero
Prof. Dr. José M. Palma
Guest Editors

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Keywords

  • antioxidants
  • hydrogen peroxide
  • nitric oxide
  • nitro-oxidative stress
  • ROS
  • RNS
  • hydrogen sulfide
  • melatonin

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Published Papers (2 papers)

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Research

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15 pages, 2802 KiB  
Article
Mitogen-Activated Protein Kinase Kinase OsMEK2 Positively Regulates Ca2+ Influx and Ferroptotic Cell Death during Rice Immune Responses
by Juan Wang, Nam Khoa Nguyen, Dongping Liu and Nam-Soo Jwa
Antioxidants 2024, 13(8), 1013; https://doi.org/10.3390/antiox13081013 - 20 Aug 2024
Viewed by 889
Abstract
Mitogen-activated protein (MAP) kinase (MAPK) signaling pathway is important in plant immune responses, involved in iron- and reactive oxygen species (ROS)-dependent ferroptotic cell death mediated by Ca2+. High Ca2+ influx triggered iron-dependent ROS accumulation, lipid peroxidation, and subsequent hypersensitive response [...] Read more.
Mitogen-activated protein (MAP) kinase (MAPK) signaling pathway is important in plant immune responses, involved in iron- and reactive oxygen species (ROS)-dependent ferroptotic cell death mediated by Ca2+. High Ca2+ influx triggered iron-dependent ROS accumulation, lipid peroxidation, and subsequent hypersensitive response (HR) cell death in rice (Oryza sativa). Apoplastic Ca2+ chelation by EGTA during avirulent Magnaporthe oryzae infection altered Ca2+, ROS, and Fe2+ accumulation, increasing rice susceptibility to infection. By contrast, acibenzolar-S-methyl (ASM), a plant defense activator, significantly enhanced Ca2+ influx, and H2O2 accumulation, triggering rice ferroptotic cell death during virulent Magnaporthe oryzae infection. Here, we report a novel role of the MAPK signaling pathway in regulating cytoplasmic Ca2+ increase during ferroptotic cell death in rice immunity, using the ΔOsmek2 knockout mutant rice. The knockout of rice OsMEK2 impaired the ROS accumulation, lipid peroxidation, and iron accumulation during avirulent M. oryzae infection. This study has shown that OsMEK2 could positively regulate iron- and ROS-dependent ferroptotic cell death in rice by modulating the expression of OsNADP-ME, OsRBOHB, OsPLC, and OsCNGC. This modulation indicates a possible mechanism for how OsMEK2 participates in Ca2+ regulation in rice ferroptotic cell death, suggesting its broader role in plant immune responses in response to M. oryzae infection. Full article
(This article belongs to the Special Issue Reactive Oxygen and Nitrogen Species in Plants―2nd Edition)
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Review

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14 pages, 2740 KiB  
Review
Hydrogen Peroxide Signaling in the Maintenance of Plant Root Apical Meristem Activity
by Hui Liu, Yangwei Mu, Yuxin Xuan, Xiaolin Wu, Wei Wang and Hui Zhang
Antioxidants 2024, 13(5), 554; https://doi.org/10.3390/antiox13050554 - 30 Apr 2024
Viewed by 1375
Abstract
Hydrogen peroxide (H2O2) is a prevalent reactive oxygen species (ROS) found in cells and takes a central role in plant development and stress adaptation. The root apical meristem (RAM) has evolved strong plasticity to adapt to complex and changing [...] Read more.
Hydrogen peroxide (H2O2) is a prevalent reactive oxygen species (ROS) found in cells and takes a central role in plant development and stress adaptation. The root apical meristem (RAM) has evolved strong plasticity to adapt to complex and changing environmental conditions. Recent advances have made great progress in explaining the mechanism of key factors, such as auxin, WUSCHEL-RELATED HOMEOBOX 5 (WOX5), PLETHORA (PLT), SHORTROOT (SHR), and SCARECROW (SCR), in the regulation of RAM activity maintenance. H2O2 functions as an emerging signaling molecule to control the quiescent center (QC) specification and stem cell niche (SCN) activity. Auxin is a key signal for the regulation of RAM maintenance, which largely depends on the formation of auxin regional gradients. H2O2 regulates the auxin gradients by the modulation of intercellular transport. H2O2 also modulates the expression of WOX5, PLTs, SHR, and SCR to maintain RAM activity. The present review is dedicated to summarizing the key factors in the regulation of RAM activity and discussing the signaling transduction of H2O2 in the maintenance of RAM activity. H2O2 is a significant signal for plant development and environmental adaptation. Full article
(This article belongs to the Special Issue Reactive Oxygen and Nitrogen Species in Plants―2nd Edition)
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