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<p>In soils, microorganisms interact with biotic and abiotic components to drive rock-to-soil transformations and imbue soil with its characteristics. We studied the bacterial and fungal communities using total DNA extracted from a soil sample collected from the active weathering zone of a landscape covered by ferruginous duricrust in the Gangani area of Garbeta, Eastern India. The XRF analysis revealed a compositionally matured nature of the ferricrete, whereas poorly sorted grain size indicates a texturally immature character. Molecular characterisation of bacterial and fungal communities through partial sequencing of the 16S and ITS rRNA genes, respectively, revealed a diverse presence of chromium (Cr) and vanadium (V)-tolerant bacterial (<i>Bacillus</i>, <i>Pseudomonas</i> and <i>Serratia</i>) and fungal (<i>Aspergillus</i>, <i>Inocybe</i>, <i>Penicillium</i>, and <i>Pisolithus</i>) genera in the studied sample. Such a microbiome can influence weathering, biomineralisation and nutrient cycling in lateritic/ferricrete landscapes and soils. The presence of Mn-oxidisers (<i>Serratia sp.</i>) and acidophilic iron-oxidisers (<i>Acidithiobacillus sp.</i>), along with <i>Bacillus sp.</i>, in combination with mycorrhizal fungi <i>Pisolithus sp.</i>, can increase weathering fluxes. The presence of ectomycorrhizal fungi, <i>Inocybe</i>, may have a possible role in stabilising laterite soils. This study is likely the first report of such geomicrobial interactions from eastern India, especially from its lateritic/ferricrete landscapes.</p>

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Characterisation of the microbial community of a ferruginous duricrust in Eastern India and its geomorphic implications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月17日

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  • Rajarshi Dasgupta,
  • Supriyo Kumar Das,
  • Sugopa Sengupta,
  • Priyank Pravin Patel,
  • Pravat Kumar Behera,
  • Dibyashree Mahapatra

摘要

In soils, microorganisms interact with biotic and abiotic components to drive rock-to-soil transformations and imbue soil with its characteristics. We studied the bacterial and fungal communities using total DNA extracted from a soil sample collected from the active weathering zone of a landscape covered by ferruginous duricrust in the Gangani area of Garbeta, Eastern India. The XRF analysis revealed a compositionally matured nature of the ferricrete, whereas poorly sorted grain size indicates a texturally immature character. Molecular characterisation of bacterial and fungal communities through partial sequencing of the 16S and ITS rRNA genes, respectively, revealed a diverse presence of chromium (Cr) and vanadium (V)-tolerant bacterial (Bacillus, Pseudomonas and Serratia) and fungal (Aspergillus, Inocybe, Penicillium, and Pisolithus) genera in the studied sample. Such a microbiome can influence weathering, biomineralisation and nutrient cycling in lateritic/ferricrete landscapes and soils. The presence of Mn-oxidisers (Serratia sp.) and acidophilic iron-oxidisers (Acidithiobacillus sp.), along with Bacillus sp., in combination with mycorrhizal fungi Pisolithus sp., can increase weathering fluxes. The presence of ectomycorrhizal fungi, Inocybe, may have a possible role in stabilising laterite soils. This study is likely the first report of such geomicrobial interactions from eastern India, especially from its lateritic/ferricrete landscapes.