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All Journal Journal of Degraded and Mining Lands Management
Ariyanti, Febriana Ida Dwi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Distribution and correlations of arbuscular mycorrhizal fungi and phosphate-solubilizing bacteria with Pb and Cd in landfill rhizosphere soils Cahyani, Vita Ratri; Ariyanti, Febriana Ida Dwi; Cahyono, Ongko; Maro’ah, Siti
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.10887

Abstract

Landfills accumulate various toxic substances, including heavy metals, yet plants can persist in these environments through interactions with functional rhizosphere microorganisms. This study investigated the distribution of cadmium (Cd), lead (Pb), and nutrient status in the rhizosphere soils of phytoremediator plants at the Putri Cempo landfill, and their relationships with arbuscular mycorrhizal fungi (AMF) and phosphate-solubilizing bacteria (PSB) across spatial gradients. Rhizosphere soils were collected from phytoremediators at landfill sites (L1, 0 m; L2, 100 m from L1) and from an agricultural site outside the landfill (L3, 500 m from L1) as a reference. Heavy metals, soil nutrients, AMF population density and diversity, and PSB communities were analyzed. All parameters, except soil pH, differed significantly among sites. The highest Pb and Cd concentrations were recorded at L1 (Pb: 75.28 mg/kg, approximately 16 times higher than L3; Cd: 0.36 mg/kg, undetected at L3), accompanied by elevated nutrient levels. Microbial communities exhibited clear spatial patterns: AMF abundance, spore density, and root colonization increased with distance from the landfill, reaching their highest values at L3, whereas PSB abundance and morphotype diversity peaked at L2. Among the phytoremediator species, Jatropha gossypiifolia accumulated the highest Pb and Cd concentrations and harbored the greatest PSB abundance, while Senna alata exhibited the strongest AMF associations. These metal-tolerant microbes associated with phytoremediator rhizospheres exhibit dual potential as biofertilizers and bioremediation agents.
Hyperaccumulator rhizosphere soil from a Pb-contaminated landfill and phosphate-solubilizing bacteria enhance Calotropis gigantea stem cutting growth, phytoremediation, and arbuscular mycorrhiza propagation Ariyanti, Febriana Ida Dwi; Cahyani, Vita Ratri; Cahyono, Ongko
Journal of Degraded and Mining Lands Management Vol. 13 No. 4 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.134.11435

Abstract

Rhizosphere soils of phytoremediator plants growing in Pb-contaminated landfill sites are natural reservoirs of indigenous arbuscular mycorrhizal fungi (AMF) and phosphate-solubilizing bacteria (PSB), which can enhance plant growth and phytoremediation. This study evaluated the combined effects of rhizosphere soils containing AMF (rhizomyco) from three phytoremediators (Calotropis gigantea, Jatropha gossypiifolia, and Senna alata) and PSB inoculation. The  pot experiment was conducted using a 3×2 factorial in a completely randomized design with four replications. The primary parameters were C. gigantea stem-cutting biomass, Pb uptake, and AMF propagation potential. Data were analyzed using ANOVA, DMRT, and Pearson’s correlation analysis. S. alata rhizomyco resulted in the highest C. gigantea stem-cutting biomass growth and Pb uptake, despite exhibiting the lowest AMF propagation potential. In contrast, J. gossypiifolia rhizomyco showed the highest AMF propagation potential but produced the lowest plant biomass among the other rhizomyco sources, suggesting that AMF propagation potential does not necessarily reflect symbiotic effectiveness in promoting plant growth and Pb uptake. Meanwhile, PSB inoculation enhanced C. gigantea stem-cutting biomass and Pb uptake, while promoting Pb retention in roots and limiting its translocation to shoots, resulting in root BAF values >1 and TF values <1. These findings highlight the potential of selecting effective rhizomyco communities and combining them with PSB inoculation to improve the growth and Pb phytoremediation capacity of C. gigantea stem cuttings.
Co-Authors Ongko Cahyono Siti Maro’ah Vita Ratri Cahyani