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The Role of Exogenous Silicon in Plant Response to Abiotic...
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The Role of Exogenous Silicon in Plant Response to Abiotic Stress

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Response to Abiotic Stress and Climate Change".

Deadline for manuscript submissions: closed (30 April 2025) | Viewed by 1024

Special Issue Editors

Dr. Farissi Mohamed

E-Mail Website
Guest Editor
Laboratory of Biotechnology & Sustainable Development of Natural Resources, Polydisciplinary Faculty of Beni Mellal, Sultan Moulay Slimane University, P.O. Box 592, Beni Mellal 23000, Morocco
Interests: silicon; biofertilizers–biostimulants; agro-ecology; sustainable agriculture; abiotic stress
Dr. Ahmed El Moukhtari

E-Mail Website
Guest Editor
Laboratory of Ecology and Environment, Faculty of Sciences Ben M'Sick, Hassan II University of Casablanca, Sidi Othman, Casablanca PB7955, Morocco
Interests: silicon; biofertilizers–biostimulants; molecular plant physiology; abiotic stress

Special Issue Information

Dear Colleagues,

Abiotic stresses from salt, drought, heavy metals, nutrient deficiencies, and extreme temperatures, caused by environmental degradation and climate change, represent major threats to agricultural production in many countries worldwide. Moreover, with the rapid increase in the world’s population, developing climate-resilient crops for improving global food security and safety and meeting the increasing food demand is an urgent issue for global society, particularly considering the uncertainties of climate change. In this context, silicon (Si) has emerged as a promising biostimulant to improve plant tolerance to abiotic stresses. In fact, the positive effects of Si on plant agro-physiological and biochemical processes have been shown in several species under unfavorable conditions. However, information on the mechanisms underlying the mitigation of different abiotic stresses, particularly at the proteomic and metabolomic levels, is scarce. Therefore, in this Special Issue, we will highlight the role of Si in enhancing crop tolerance to abiotic stress, alongside the molecular, proteomic, and metabolomic mechanisms behind it.

This Special Issue welcomes submission of research articles, reviews, and mini-reviews related to the following sub-topics:

  • Promoting effects of Si on plant physiological and biochemical adaptation to abiotic stress;
  • Effect of Si on plant ionomics and associated gene expression;
  • Metabolomic and proteomic analyses in Si-treated plants.

All research efforts (applied or not) regarding the growth-promoting effects of Si in mitigating different abiotic stressors’ detrimental influences are extremely encouraged.

Dr. Farissi Mohamed
Dr. Ahmed El Moukhtari
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

  • silicon
  • abiotic stress
  • tolerance
  • metabolomics
  • proteomics
  • ionomics

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Published Papers (2 papers)

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Research

11 pages, 1934 KiB  
Article
Silicon Supply Improves the Rhizodeposition and Transfer of Nitrogen from Trifolium incarnatum L. to Brassica napus L.
by Raphaël Coquerel, Mustapha Arkoun, Philippe Laîné and Philippe Etienne
Plants 2025, 14(8), 1246; https://doi.org/10.3390/plants14081246 - 19 Apr 2025
Viewed by 135
Abstract
The association of legumes with other non-legume plants, such as Brassica napus L., has been reported as an agro-ecological alternative for reducing the nitrogen (N) inputs required for B. napus growth, thanks in particular to the transfer of N compounds from the legume [...] Read more.
The association of legumes with other non-legume plants, such as Brassica napus L., has been reported as an agro-ecological alternative for reducing the nitrogen (N) inputs required for B. napus growth, thanks in particular to the transfer of N compounds from the legume to B. napus. Moreover, recent studies have evidenced that silicon (Si) supply can improve either N uptake by B. napus or the dinitrogen fixation capacity of T. incarnatum. However, the effect of Si supply on the N nutrition of both B. napus and T. incarnatum, especially when growing in association, has not been assessed so far. The aim of this study was to assess the effect of Si supply on the growth of B. napus and T. incarnatum cultivated in association by focusing particularly on N rhizodeposition by T. incarnatum and its transfer to B. napus. The experiment was performed for 10 weeks under a split-root system combined with an 15N labeling method. The results showed that the Si supply increased the amount of rhizo-deposited N by T. incarnatum by over 40% and enhanced its transfer to B. napus. The transferred N was allocated mainly to pods (17%), as their biomass increased under Si supply. For the first time, this study demonstrates that the association with legume plants together with the Si supply could be an effective approach to improve the agro-ecological balance of B. napus. Full article
(This article belongs to the Special Issue The Role of Exogenous Silicon in Plant Response to Abiotic Stress)
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17 pages, 4597 KiB  
Article
Foliar Silicon Alleviates Water Deficit in Cowpea by Enhancing Nutrient Uptake, Proline Accumulation, and Antioxidant Activity
by Larissa Lanay Germano de Queiroz, Evandro Franklin de Mesquita, Caio da Silva Sousa, Rennan Fernandes Pereira, José Paulo Costa Diniz, Alberto Soares de Melo, Rayanne Silva de Alencar, Guilherme Felix Dias, Vitória Carolina da Silva Soares, Francisco de Oliveira Mesquita, José Philippe Martins Montenegro Pires, Samuel Saldanha Rodrigues, Lays Klécia Silva Lins, Anailson de Sousa Alves, Karoline Thays Andrade Araújo and Patrícia da Silva Costa Ferraz
Plants 2025, 14(8), 1241; https://doi.org/10.3390/plants14081241 - 19 Apr 2025
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Abstract
Silicon has emerged as a beneficial element in mitigating water deficit in various crops, although the underlying mechanisms still require further investigation. This study evaluated the foliar content of nutrients (N, P, K, and Ca) and proline, antioxidant activity, growth, water use efficiency, [...] Read more.
Silicon has emerged as a beneficial element in mitigating water deficit in various crops, although the underlying mechanisms still require further investigation. This study evaluated the foliar content of nutrients (N, P, K, and Ca) and proline, antioxidant activity, growth, water use efficiency, and yield of cowpea cultivars subjected to two irrigation depths (50% and 100% of crop evapotranspiration) and a foliar application of silicon (orthosilicic acid). A field experiment was conducted in a split-plot scheme using the randomized block design with four replications in a semi-arid region of northeastern Brazil. Silicon supplementation increased the foliar contents of N, P, and Ca; stimulated proline synthesis; and enhanced the activity of the SOD, CAT, and APX enzymes. These changes promoted growth, improved water use efficiency, and increased crop yield. The results indicate that foliar silicon application mitigates the effects of water deficit in cowpea plants while enhancing crop performance under full irrigation (100% of crop evapotranspiration), leading to higher yields even under favorable water conditions. Full article
(This article belongs to the Special Issue The Role of Exogenous Silicon in Plant Response to Abiotic Stress)
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