What question did this study set out to answer?

The aim is to assess the combined effects of arbuscular mycorrhizal fungi and plant growth promoting rhizobacteria on soil organic carbon levels.

February 9, 2026Open Access

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The interactions between rhizobacteria and arbuscular mycorrhizal fungi enhance global soil carbon sequestration in drylands: A global meta-analysis

MRMuhammad Maqsood Ur Rehman YXYun-Li XiaoHuanggang Normal University SKSidra KhattakLanzhou University

Key Points

The aim is to assess the combined effects of arbuscular mycorrhizal fungi and plant growth promoting rhizobacteria on soil organic carbon levels.
Conducted a global meta-analysis of 989 observations
Assessed the impacts of AMF and PGPR single and co-inoculation
Evaluated SOC levels under various soil textures and pH in cropping systems
Co-inoculation increased SOC levels significantly in coarse (46%) and medium-textured (54%) soils
Improved enzymatic activities contributed to SOC accumulation by 39-90%
Specific genera of AMF and PGPR led to glomalin production increases of 48-51%

Abstract

Based on 989 observations, the meta-analysis reveals that both single and co-inoculation of AMF and PGPR significantly improve SOC levels. This increase is driven by enhancing key SOC fractions, including microbial biomass carbon, easily oxidizable carbon, dissolved, light fraction, and particulate organic carbon accumulation. The AMF-PGPR co-inoculation strategy is particularly effective across diverse conditions, significantly enhancing SOC in coarse (46%) and medium-textured (54%) soils across acidic (48%) and alkaline (48%) pH in various cropping systems by improving root and shoot traits. Different genera of AMF (Glomus, Rhizophagus) and PGPR (Bacillus, Pseudomonas) synergetically enhance SOC through glomalin production (48-51%), hyphal architecture (122%), phytochrome production (52%), and microbial enzymatic activities. AMF and PGPR co-inoculation enhances SOC accumulation by improving enzymatic activities (39-90%) and plant traits (44-251%). This meta-analysis concludes that AMF-PGPR co-incoulation is a sustainable strategy for increasing global soil carbon sequestration, thereby improving soil health and crop productivity in dryland ecosystems.

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Cite This Study

Rehman et al. (Sun,) studied this question.

synapsesocial.com/papers/698978dff0ec2af6756e7223 https://doi.org/https://doi.org/10.1016/j.jare.2026.01.076

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