Plant–Microorganism 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 July 2026 | Viewed by 1836

Special Issue Editor


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Guest Editor
1. Pilot Plant for Industrial and Microbiological Processes (PROIMI-CONICET), Avenida Belgrano y Pasaje Caseros, Tucuman 4000, Argentina
2. Facultad de Ciencias Naturales e Instituto Miguel Lillo, Universidad Nacional de Tucumán, Miguel Lillo 205, Tucuman 4000, Argentina
Interests: microbial roles in agricultural sustainability, bioremediation and ecosystem restoration; microbial functional diversity; abiotic stress tolerance; biotechnological applications of microbial strains and consortia

Special Issue Information

Dear Colleagues,

Plant–microorganism interactions are central to crop productivity, soil fertility, and ecosystem sustainability. Beneficial microbes not only support plant growth and nutrient uptake but also enhance tolerance to abiotic stress. In the face of increasing challenges, such as soil salinization, drought, and contamination by organic pollutants, understanding and harnessing these interactions is crucial for sustainable agriculture. This Special Issue invites the submission of research and reviews that explore microbial diversity, mechanisms of plant–microbe communication, and innovative applications of bioinoculants or microbial consortia. Particular emphasis will be placed on studies addressing plant resilience under abiotic stress, providing novel insights into how these partnerships can be translated into biotechnological strategies for agriculture and environmental remediation.

Dr. Alvarez Analia
Guest Editor

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Keywords

  • bioinoculants
  • soil salinity
  • bio-nanoparticles
  • sustainable agriculture
  • stress tolerance
  • environmental remediation

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Published Papers (2 papers)

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Research

24 pages, 3210 KB  
Article
Microbial Silver Nanoparticles Enhance the Performance of Maize Plants Cultivated in Naturally Occurring Saline Soil
by Fernando Gabriel Martínez, Paula Paterlini, Maria Cecilia Rasuk, Carolina Prado, Emilce Viruel, Cintia Mariana Romero and Analía Álvarez
Plants 2026, 15(4), 524; https://doi.org/10.3390/plants15040524 - 7 Feb 2026
Viewed by 667
Abstract
Soil salinity is a major abiotic stress that limits agricultural productivity worldwide. The aim of this study was to evaluate whether biogenic silver nanoparticles (AgNPs) can mitigate salt stress in maize while preserving soil biological health under realistic soil conditions. Biogenic AgNPs were [...] Read more.
Soil salinity is a major abiotic stress that limits agricultural productivity worldwide. The aim of this study was to evaluate whether biogenic silver nanoparticles (AgNPs) can mitigate salt stress in maize while preserving soil biological health under realistic soil conditions. Biogenic AgNPs were synthesized using biomolecules from the actinobacterium Streptomyces sp. Z38 and characterized, confirming spherical morphology, colloidal stability, and surface functionalization. Maize plants grown under greenhouse conditions were treated with biogenic or chemically synthesized AgNPs, and plant performance, oxidative stress responses, and soil biological properties were evaluated. Under saline conditions (6 mS cm−1), biogenic AgNPs markedly improved plant growth, almost fully restoring leaf dry weight (165.08 ± 23.68 mg) to values comparable with non-saline controls (171.81 ± 15.00 mg), while chemical AgNPs induced only partial recovery. Biogenic AgNPs also enhanced antioxidant defenses, increasing catalase activity by ~15% above non-saline levels and reducing lipid peroxidation from 232.34 ± 31.74 to 102.63 ± 5.75 Eq. MDA g−1. In parallel, chlorophyll a content increased by ~29% relative to non-saline plants, indicating improved photosynthetic performance. Transmission electron microscopy of leaves confirmed AgNPs internalization, with nanoparticles primarily sequestered in vacuoles. Analyses of experimental soils showed that biogenic AgNPs enhanced microbial enzymatic activity and respiration, while chemical AgNPs had inhibitory effects. Ecotoxicological assays further indicated low soil toxicity following biogenic AgNPs plant treatment, as reflected by high lettuce germination rates. Overall, these findings highlight the potential of biogenic AgNPs obtained from actinobacteria as sustainable nanobiotechnological tools to mitigate salt stress in crops while improving soil health. Future field-scale studies will be required to validate their agronomic applicability. Full article
(This article belongs to the Special Issue Plant–Microorganism Interactions)
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19 pages, 7083 KB  
Article
Bio-Organic Fertilizer with Bacillus velezensis Promoted Plant Growth by Regulating Soil Microbial Community Structure and C/N Cycle Function
by Haiyun Zhang, Cuixue Cui, Shuangxi Li, Weiguang Lv, Juanqin Zhang, Xianpu Zhu, Chenglong Xu, Qun Wang, Naling Bai and Hanlin Zhang
Plants 2026, 15(3), 382; https://doi.org/10.3390/plants15030382 - 26 Jan 2026
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Abstract
This study investigated the effects of bio-organic fertilizer (BF) containing plant growth-promoting bacterium Bacillus velezensis SS-20 on soil properties, microbial community structure, and C/N cycle functional genes. The results showed that compared with chemical fertilizer (CF) and deactivated bio-organic fertilizer (BFD) treatments, BF [...] Read more.
This study investigated the effects of bio-organic fertilizer (BF) containing plant growth-promoting bacterium Bacillus velezensis SS-20 on soil properties, microbial community structure, and C/N cycle functional genes. The results showed that compared with chemical fertilizer (CF) and deactivated bio-organic fertilizer (BFD) treatments, BF significantly improved soil physicochemical properties. Soil pH, organic matter, total nitrogen, total potassium, and total phosphorus content under BF treatment were increased by 14.8%, 56.5%, 48.2%, 38.8%, and 58.4%, respectively, compared to the control; soil urease and sucrase activities increased by 3.5 and 2.4 times those of CF treatment, respectively. Meanwhile, BF increased pakchoi yield by 11.2% (vs. CF). BF treatment enhanced the relative abundance of beneficial bacteria Actinomycetota by 28.4% compared with the BFD treatment and raised that of fungi Ascomycota to 1.9 times that of the control. At the genus level, BF significantly enriched biocontrol-relevant genus Pseudogymnoascus, whose abundance reached three times that of CF treatment, while the abundance of potentially harmful genus Penicillium decreased by 82%. BF also led to a high degree of synergy in carbon and nitrogen cycles. Functional gene analysis indicated that BF down-regulated multiple carbon-degrading genes, increased organic nitrogen metabolism genes by 5.3%, and reduced denitrification genes by 13.3%. Overall, bio-organic fertilizer optimized the soil microenvironment, regulated the microbial community structure, and improved C/N use efficiency and plant growth by introducing functional microorganisms and organic matter. Full article
(This article belongs to the Special Issue Plant–Microorganism Interactions)
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