Plant Symbiotic Fungi

A special issue of Journal of Fungi (ISSN 2309-608X). This special issue belongs to the section "Environmental and Ecological Interactions of Fungi".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 883

Special Issue Editor

College of Life Sciences, Nanjing Normal University, Nanjing 210023, China
Interests: soil microorganisms; microbial ecology; plant-microorganism-insect interactions; endophytic fungi; plant symbiotic fungi

Special Issue Information

Dear Colleagues,

Plant Symbiotic fungi are fungi that form mutually beneficial relationships with plants, typically colonizing their roots, stems, or leaves. The rapid development of omics technologies has significantly advanced our understanding of the diversity of plant symbiotic fungi. Plant symbiotic fungi exchange nutrients and resources with their host plants, enhancing their capacity to absorb water, minerals (e.g., phosphate, nitrogen, and potassium), and withstand environmental stresses (e.g., drought, salinity, pathogens, and insects). Additionally, plant–fungal symbiosis plays a critical role in ecosystem functioning. In return, plants provide carbohydrates or liquids to sustain fungal growth. The establishment of this relationship involves signal exchange between host plants and symbiotic fungi. Generally, plant symbiotic fungi include mycorrhizal fungi and endophytic fungi. Among them, arbuscular mycorrhizal fungi (AMF) have co-evolved with plants for over 400 million years, established symbiotic relationship with about 80% of land plants, and formed branched structures called arbuscules for nutrient exchange. AMF inoculation has been reported to enhance the growth and productivity of various crops.

This Special Issue aims to give an overview of the most recent advances in the field of plant symbiotic fungi. It also aims to provide contributions showcasing advances in the diversity of the plant symbiotic fungal community, the molecular mechanisms of nutrient uptake enhancement, abiotic and biotic stress tolerance by symbiotic fungi, signal exchange and gene networks between host plants and symbiotic fungi, and symbiotic relationships with ecosystem functioning (e.g., carbon sequestration). Potential topics include, but are not limited to, the diversity of plant symbiotic fungal community, the molecular mechanisms of symbiotic fungi-mediated nutrient uptake enhancement, abiotic and biotic stress tolerance, signal exchange and gene networks during the establishment of plant–fungal symbiosis, and the impacts of plant–fungal symbiosis on ecosystem functioning.

Dr. Wei Zhang
Guest Editor

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Keywords

  • fungal communities
  • nutrient uptake
  • abiotic and biotic stress tolerance
  • signal exchange
  • gene network
  • ecosystem functioning
  • arbuscular mycorrhizal fungi (AMF)

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Published Papers (2 papers)

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Research

15 pages, 3145 KB  
Article
ABA and Ethylene Mediates Tomato Root Development Modulation During Endophytic Fungal Interaction
by Maria Feka, Bilge Chousein, Olga Tsiouri and Kalliope K. Papadopoulou
J. Fungi 2025, 11(10), 707; https://doi.org/10.3390/jof11100707 - 30 Sep 2025
Abstract
The early stages of plant–microbe interaction are critical for establishing beneficial symbioses. We investigated how the endophytic fungus Fusarium solani strain FsK modulates tomato (Solanum lycopersicum) development and hormone pathways during in vitro co-cultivation. Seedlings were sampled at three early interaction [...] Read more.
The early stages of plant–microbe interaction are critical for establishing beneficial symbioses. We investigated how the endophytic fungus Fusarium solani strain FsK modulates tomato (Solanum lycopersicum) development and hormone pathways during in vitro co-cultivation. Seedlings were sampled at three early interaction stages (pre-contact, T1; initial contact, T2, 3 days post-contact, T3). Root traits and root and leaf transcripts for abscisic acid (ABA) and ethylene (ET) pathways were quantified, alongside fungal ET-biosynthesis genes. FsK altered root system architecture, increasing root area, lateral root number, root-hair length, and fresh biomass. These morphological changes coincided with tissue- and time-specific shifts. In leaves, FsK broadly affected ABA biosynthetic and homeostasis genes (ZEP1, NCED1, ABA2, AAO1, ABA-GT, BG1), indicating reduced de novo synthesis with enhanced deconjugation of stored ABA. ET biosynthesis was curtailed in leaves via down-regulation of ACC oxidase (ACO1–3), with isoform-specific changes in ACC synthase (ACS). The ET receptor ETR1 was transiently expressed early (T1–T2). FsK itself showed staged activation of fungal ET-biosynthesis genes. These results reveal coordinated fungal–plant hormone control at the transcriptional level that promotes root development during early interaction and support FsK’s potential as a biostimulant. Full article
(This article belongs to the Special Issue Plant Symbiotic Fungi)
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15 pages, 2155 KB  
Article
Arbuscular Mycorrhizal Fungi Promote Soil Respiration Primarily Through Mediating Microbial and Root Biomass in Rocky Desertification Habitat
by Shuang Zhao, Shaojun Wang, Yali Song, Lingling Xie, Bo Xiao and Xiaofei Guo
J. Fungi 2025, 11(9), 616; https://doi.org/10.3390/jof11090616 - 24 Aug 2025
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Abstract
Arbuscular mycorrhizal (AM) fungi can have complicated interactions with plants and soils, which play a critical role in mediating the soil carbon cycle. However, the mechanism by which AM fungi regulate soil respiration is not well documented. This study conducted a completely randomized [...] Read more.
Arbuscular mycorrhizal (AM) fungi can have complicated interactions with plants and soils, which play a critical role in mediating the soil carbon cycle. However, the mechanism by which AM fungi regulate soil respiration is not well documented. This study conducted a completely randomized block-design mesocosm experiment using the inoculation of AM fungi (RI: Rhizophagus intraradices; FM: Funneliformis mosseae) with Fraxinus malacophylla to identify the pathways of AM fungi controlling soil respiration in a rocky desertification habitat. We observed that the average soil respiration rates (3.78 μmol·m−2·s−1) were significantly higher in two AM fungi inoculation treatments than in the control (2.87 μmol·m−2·s−1). Soil respiration rates were 1.59-fold higher in RI fungi inoculation and 1.05-fold higher in FM inoculation than in the control. Explanation rates of microbial biomass carbon, biomass nitrogen, and root biomass in RI (57.46–76.49%) and FM (44.81–62.62%) inoculation for soil respiration variation were higher than those in the control (24.51–34.32%). The direct positive pathway of soil respiration was mainly regulated by microbial biomass (59.5%) and root biomass (34.90%), while the indirect positive contributions of soil physicochemical properties (30.00%), colonization level (3.50%), soil microclimate (19.30%), and enzyme activity (3.38%) to respiration dynamics ranked second. Thus, we conclude that soil respiration dynamics can be mainly controlled by AM fungi-mediated changes in microbial and root biomass in rocky desertification areas. Full article
(This article belongs to the Special Issue Plant Symbiotic Fungi)
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