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Nitric Oxide Signalling in Plants
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Nitric Oxide Signalling in Plants

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: 20 June 2025 | Viewed by 7458

Special Issue Editor

Dr. Mun Bong-Gyu

E-Mail Website
Guest Editor
Department of Environmental and Biological Chemistry, Chungbuk National University, Cheongju, Republic of Korea
Interests: plant molecular biology; molecular plant physiology; nitric oxide; arabidopsis; phytohormones
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

Nitric oxide (NO) is a gaseous small molecule and as a free radical, it plays important roles in various physiological and biological processes in plants. NO also acts as signal molecule and transducer with a range of functions, including seed germination, growth, root development, ripening and plant aging. The study of NO biology in plants during the last few decades has proved the beneficial role of NO in plant growth, but also the toxic byproducts of oxidative metabolism when exposed to abiotic/biotic stresses. Some NO-mediated transcriptomic and metabolomic investigations have revealed that changes in cellular NO levels via the modification of thiol groups are critical for plants to acclimate against diverse stress conditions, and can be an important product of N metabolism. Recently, some research in NO biology has evidenced that the production of NO is affected by N supply, and free radical NO or exogenous NO donor appears to regulate N assimilation.

This Special Issue focuses on extending current knowledge of nitric oxide signaling in plants, along with the ways NO can interact with other reactive signaling molecules, enzymes and metabolites and also how NO signaling/metabolism can affect plant growth and development under normal or stressed conditions.

Dr. Mun Bong-Gyu
Guest Editor

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Keywords

  • nitric oxide
  • NO-mediated transcriptome
  • post-transcription modification
  • S-nitrosylation
  • N assimilation
  • NO homeostasis
  • gaseous NO
  • cellular signaling
  • nitric oxide signaling
  • transcription factors (TFs)

 

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Published Papers (3 papers)

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Research

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15 pages, 2586 KiB  
Article
The Response of Hormones, Reactive Oxygen Species and Nitric Oxide in the Polyethylene-Glycol-Promoted, Salt–Alkali-Stress-Induced Embryo Germination of Sorbus pohuashanensis
by Xiaodong Wang, Hailong Shen and Ling Yang
Int. J. Mol. Sci. 2024, 25(10), 5128; https://doi.org/10.3390/ijms25105128 - 8 May 2024
Cited by 1 | Viewed by 887
Abstract
Polyethylene glycol can abrogate plant seed dormancy and alleviate salt–alkali stress damage to plants, but its role in embryonic dormancy abrogation and germination in Sorbus pohuashanensis is not yet clear. The mechanism by which polyethylene glycol promotes the release of embryonic dormancy may [...] Read more.
Polyethylene glycol can abrogate plant seed dormancy and alleviate salt–alkali stress damage to plants, but its role in embryonic dormancy abrogation and germination in Sorbus pohuashanensis is not yet clear. The mechanism by which polyethylene glycol promotes the release of embryonic dormancy may be related to the synthesis and metabolism of endogenous hormones, reactive oxygen species and reactive nitrogen. In this article, germination in indoor culture dishes was used, and the most suitable conditions for treating S. pohuashanensis embryos, with polyethylene glycol (PEG) and sodium carbonate (Na2CO3), were selected. Germination was observed and recorded, and related physiological indicators such as endogenous hormones, reactive oxygen species and reactive nitrogen were measured and analyzed to elucidate the mechanism of polyethylene glycol in alleviating salt–alkali stress in S. pohuashanensis embryos. The results showed that soaking seeds in 5% PEG for 5 days is the best condition to promote germination, which can increase the germination rate of embryos under salt–alkali stress by 1–2 times and improve indicators such as germination speed and the germination index. Polyethylene glycol led to an increase in gibberellin (GA), indole-3-acetic acid (IAA), ethylene (ETH), cytokinin (CTK), nitric oxide (NO), soluble protein and soluble sugar in the embryos under salt–alkali stress; increased activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), nitrate reductase (NR) and nitric oxide synthase (NOS) in the embryos; a reduction in the accumulation of abscisic acid (ABA), hydrogen peroxide (H2O2) and malondialdehyde (MDA). Therefore, it is suggested that the inhibitory effect of polyethylene glycol on the salt–alkali-stress-induced germination of S. pohuashanensis embryos is closely related to the response of endogenous hormones, reactive oxygen species and nitric oxide signalling. Full article
(This article belongs to the Special Issue Nitric Oxide Signalling in Plants)
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16 pages, 2166 KiB  
Article
Exogenous Nitric Oxide Alleviates Water Deficit and Increases the Seed Production of an Endemic Amazonian Canga Grass
by Daniela Boanares, Cristiane J. Da-Silva, Keila Jamille Alves Costa, Joana Patrícia Pantoja Serrão Filgueira, Marina Ludmila Oliveira Conor Salles, Luiz Palhares Neto, Markus Gastauer, Rafael Valadares, Priscila Sanjuan Medeiros, Silvio Junio Ramos and Cecilio Frois Caldeira
Int. J. Mol. Sci. 2023, 24(23), 16676; https://doi.org/10.3390/ijms242316676 - 23 Nov 2023
Viewed by 1309
Abstract
Open pit mining can cause loss in different ecosystems, including damage to habitats of rare and endemic species. Understanding the biology of these species is fundamental for their conservation, and to assist in decision-making. Sporobolus multiramosus is an annual grass endemic to the [...] Read more.
Open pit mining can cause loss in different ecosystems, including damage to habitats of rare and endemic species. Understanding the biology of these species is fundamental for their conservation, and to assist in decision-making. Sporobolus multiramosus is an annual grass endemic to the Amazon canga ecosystems, which comprise rocky outcrop vegetation covering one of the world’s largest iron ore reserves. Here, we evaluated whether nitric oxide aids S. multiramosus in coping with water shortages and examined the physiological processes behind these adaptations. nitric oxide application improved the water status, photosynthetic efficiency, biomass production, and seed production and germination of S. multiramosus under water deficit conditions. These enhancements were accompanied by adjustments in leaf and root anatomy, including changes in stomata density and size and root endodermis thickness and vascular cylinder diameter. Proteomic analysis revealed that nitric oxide promoted the activation of several proteins involved in the response to environmental stress and flower and fruit development. Overall, the results suggest that exogenous nitric oxide has the potential to enhance the growth and productivity of S. multiramosus. Enhancements in seed productivity have significant implications for conservation initiatives and can be applied to seed production areas, particularly for the restoration of native ecosystems. Full article
(This article belongs to the Special Issue Nitric Oxide Signalling in Plants)
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Review

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21 pages, 2060 KiB  
Review
Nitric Oxide Acts as a Key Signaling Molecule in Plant Development under Stressful Conditions
by Murtaza Khan, Sajid Ali, Tiba Nazar Ibrahim Al Azzawi and Byung-Wook Yun
Int. J. Mol. Sci. 2023, 24(5), 4782; https://doi.org/10.3390/ijms24054782 - 1 Mar 2023
Cited by 46 | Viewed by 4306
Abstract
Nitric oxide (NO), a colorless gaseous molecule, is a lipophilic free radical that easily diffuses through the plasma membrane. These characteristics make NO an ideal autocrine (i.e., within a single cell) and paracrine (i.e., between adjacent cells) signalling molecule. As a chemical messenger, [...] Read more.
Nitric oxide (NO), a colorless gaseous molecule, is a lipophilic free radical that easily diffuses through the plasma membrane. These characteristics make NO an ideal autocrine (i.e., within a single cell) and paracrine (i.e., between adjacent cells) signalling molecule. As a chemical messenger, NO plays a crucial role in plant growth, development, and responses to biotic and abiotic stresses. Furthermore, NO interacts with reactive oxygen species, antioxidants, melatonin, and hydrogen sulfide. It regulates gene expression, modulates phytohormones, and contributes to plant growth and defense mechanisms. In plants, NO is mainly produced via redox pathways. However, nitric oxide synthase, a key enzyme in NO production, has been poorly understood recently in both model and crop plants. In this review, we discuss the pivotal role of NO in signalling and chemical interactions as well as its involvement in the mitigation of biotic and abiotic stress conditions. In the current review, we have discussed various aspects of NO including its biosynthesis, interaction with reactive oxygen species (ROS), melatonin (MEL), hydrogen sulfide, enzymes, phytohormones, and its role in normal and stressful conditions. Full article
(This article belongs to the Special Issue Nitric Oxide Signalling in Plants)
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