Plant–Rhizosphere Interactions

A special issue of Plants (ISSN 2223-7747). This special issue belongs to the section "Plant Protection and Biotic Interactions".

Deadline for manuscript submissions: 31 March 2026 | Viewed by 448

Special Issue Editors


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Guest Editor
Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, Rondebosch, Cape Town 7701, South Africa
Interests: molecular physiology of vegetative desiccation tolerance (resurrection plants); plant–rhizosphere interactions in resurrection plants; drought tolerance in crops; agricultural biotechnology applications
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Guest Editor Assistant
Department of Molecular and Cell Biology, University of Cape Town, Private Bag X3, Rondebosch, Cape Town 7701, South Africa
Interests: application of omics in plant-microbe interaction; biogeochemistry of rhizosphere soil; sustainable and resilient agricultural systems

Special Issue Information

Dear Colleagues,

Research on plant–rhizosphere interactions is gaining much traction. For the uninitiated, such interactions refer to the complex relationships between plant roots and the surrounding soil environment, including microorganisms, nutrients, and other soil components. These interactions influence plant growth, soil health, and nutrient cycling, playing a crucial role in ecosystems and agricultural productivity. While it has long been known that beneficial microbes such as mycorrhizal fungi and rhizobacteria establish symbiotic relationships with plant roots, thereby enhancing nutrient availability and uptake and improving soil structure, they can also suppress harmful pathogens and mitigate environmental stresses. Plants provide carbon for soil microorganisms, primarily through the release of root exudates that influence the structure of rhizosphere microbial communities. Recent advances have shown that rhizosphere interactions support plant growth and adaptation to abiotic stressors, including drought, salinity, and heavy metal contamination, by modulating hormone levels and activating defense mechanisms. They are thus increasingly sought after as green agents in promoting crop health and stress resilience and reducing dependence on chemical fertilizers and pesticides. In natural ecosystems they assist in plant conservation by, inter alia, facilitating decomposition of soil organic matter, playing a crucial role in maintaining ecological balance. As climate change and land degradation threaten global food security and ecosystem stability, understanding and optimizing rhizosphere interactions is crucial for developing resilient plant systems that can withstand environmental fluctuations. We thus propose that understanding and promoting beneficial plant–rhizosphere interactions is essential for achieving sustainable land management and advancing agricultural and ecological resilience. We invite you to participate in advancing our knowledge in understanding plant–rhizosphere interactions.

Prof. Dr. Jill M. Farrant
Guest Editor

Dr. Shandry M. Tebele
Guest Editor Assistant

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Keywords

  • plant growth-promoting-microbes (PGPM)
  • mycorrhizal fungi
  • rhizosphere
  • root exudates
  • biofertilizer
  • abiotic stress
  • sustainable agriculture
  • microbiomes

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Published Papers (1 paper)

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Research

18 pages, 3689 KB  
Article
Biocontrol Potential of Rhizobacteria Against Passalora fulva and Tuta absoluta: A Sustainable Approach for Tomato Protection
by Said Bahoch, Abdessamad Elaasri, Salahddine Chafiki, Fouad Elame, Ahmed Wifaya, El hassan Mayad, Rachid Bouharroud and Redouan Qessaoui
Plants 2025, 14(17), 2672; https://doi.org/10.3390/plants14172672 - 27 Aug 2025
Viewed by 294
Abstract
Plant growth-promoting rhizobacteria (PGPR) offer a sustainable strategy for enhancing crop productivity and suppressing phytopathogens. In this study, seven bacterial isolates obtained from the rhizosphere of healthy tomato plants were evaluated for their antagonistic activity against the fungal pathogen Passalora fulva, the [...] Read more.
Plant growth-promoting rhizobacteria (PGPR) offer a sustainable strategy for enhancing crop productivity and suppressing phytopathogens. In this study, seven bacterial isolates obtained from the rhizosphere of healthy tomato plants were evaluated for their antagonistic activity against the fungal pathogen Passalora fulva, the leaf miner Tuta absoluta, and their effects on tomato growth. In vitro dual-culture assays revealed that isolates IQR1, IQR2, IQR3, and IQR5 significantly inhibited P. fulva mycelial growth, with inhibition rates exceeding 35%. Volatile organic compounds (VOCs) produced by the bacterial isolates exhibited considerable antifungal activity, with IQR5, IQR1, and IQR2 achieving over 84% inhibition. Molecular identification based on 16S rDNA sequencing indicated that these isolates belong to distinct taxa: Leucobacter aridicolis (ON799334.1) (genus Leucobacter), Paenochrobactrum sp. (JF804769.1) (genus Paenochrobactrum), an uncultured bacterium (JQ337400.1) (genus Psychrobacter), and marine bacterium AK6_052 (KF816539.1) (genus Brevundimonas). Under greenhouse conditions, isolates IQR3, IQR5, and IQR1 reduced disease incidence of P. fulva to 20–26%. The same isolates also promoted plant growth, enhancing stem height and collar diameter. In addition, IQR5 significantly reduced T. absoluta larval density and foliar damage, with the number of larvae per leaflet decreasing to 1.42, compared to 3.20 in the control. These findings highlight the potentials of these rhizobacterial strains—particularly IQR5—as effective biocontrol agents and biofertilizers for integrated pest and disease management in tomato cultivation. Full article
(This article belongs to the Special Issue Plant–Rhizosphere Interactions)
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