ArticleFrontiers in microbiology2026
Integrated study of rhizosphere microbiome and metabolome profiles across tropical plantations in the Western Ghat regions of Kerala and Tamil Nadu, India.
Article in Frontiers in microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Soil physicochemical properties, plantation types, plant taxa, and geographical locations are the major factors influencing the microbial composition and diversity of the rhizosphere soils. Methods and results: The present study aimed to investigate the variations in microbiome and metabolome composition across rhizosphere soils of plantations in the Western Ghats, based on 'plantation types' (mixed-species and mono-species), 'sampling locations' (Kerala and Coonoor), 'plant types' (shrubs and trees) and 'plant genera' (Eucalyptus, Pine, Silver oak, Tea, Rubber and Coffee); using 16S rRNA sequencing and GC-MS analysis. The mono-species samples had higher concentrations of K and heavy metals, such as Pb, Cr, Ni, and Cu than the mixed-species samples. The soil dehydrogenase activity (DHA) was highest in the mono-species tea and coffee samples from Kerala. However, the mixed-species pine and eucalyptus had comparatively higher DHA values than the mono-species pine and eucalyptus. Conclusion: This study provides new insights into the alterations in the rhizosphere bacteriome across various plantations in the Western Ghats region based on plantation type, plant genera, metabolites, and other soil physiochemical properties. Impact statement: Plantation type and sampling location were the factors that significantly influenced the rhizosphere metabolome and microbiome profiles, followed by plant genera and plant type.
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