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<p>The composition and role of non-culturable bacterial populations in the rhizosphere of plants growing on polluted sites remain underexplored. This study investigates the non-culturable bacterial communities associated with <i>Parthenium hysterophorus L.</i> and <i>Cannabis sativa L.</i>, growing on complex organometallic waste from anaerobically treated distillery wastewater sludge. Dominant genera identified in the rhizospheric sludge of <i>C. sativa</i> and <i>P. hysterophorus</i> included <i>Bacillus</i>, which was more abundant in <i>C. sativa</i> (2.0%) compared to <i>P. hysterophorus</i> (1.5%), and <i>Candidatus solibacter</i>, which was higher in <i>P. hysterophorus</i> (2.1%) compared to <i>C. sativa</i> (1.8%). <i>Flavobacterium</i> was detected at 1.9% in both samples, while unknown genera constituted a significant proportion (56.9% in <i>C. sativa</i> and 56.5% in <i>P. hysterophorus</i>). GC-MS analysis of the rhizosphere samples of <i>C. sativa</i> and <i>P. hysterophorus</i> identified organic pollutants such as 9-octadecenoic acid, cyclotetradecane, 1-dodecene, 2,4-di-tert-butylphenol, pyrene, and 3-methyl-2-anthracenamine, many of which are endocrine-disrupting chemicals (EDCs) or carcinogens. After 50 days of sludge disposal, naturally growing plants, <i>P. hysterophorus</i> and <i>C. sativa</i> were observed on the site, coinciding with a reduction or transformation of certain organic pollutants, suggesting the potential role of indigenous plant-microbe interactions in pollutant degradation. These findings suggest role of rhizospheric bacterial communities in mediating pollutant degradation, highlighting their potential designing phytoremediation strategies for eco-restoration of distillery waste-polluted sites, not contributing but ensuring achievement of sustainable development goals.</p>

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Metagenomics analysis of rhizospheric bacterial community of Cannabis sativa and Parthenium hysterophorus growing on distillery sludge for ecorestoration of polluted site

  • 期刊论文

  • 发表日期：

    2025年7月16日

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  • Kshitij Singh,
  • Mohd. Zobair Iqbal,
  • Ram Chandra

摘要

The composition and role of non-culturable bacterial populations in the rhizosphere of plants growing on polluted sites remain underexplored. This study investigates the non-culturable bacterial communities associated with Parthenium hysterophorus L. and Cannabis sativa L., growing on complex organometallic waste from anaerobically treated distillery wastewater sludge. Dominant genera identified in the rhizospheric sludge of C. sativa and P. hysterophorus included Bacillus, which was more abundant in C. sativa (2.0%) compared to P. hysterophorus (1.5%), and Candidatus solibacter, which was higher in P. hysterophorus (2.1%) compared to C. sativa (1.8%). Flavobacterium was detected at 1.9% in both samples, while unknown genera constituted a significant proportion (56.9% in C. sativa and 56.5% in P. hysterophorus). GC-MS analysis of the rhizosphere samples of C. sativa and P. hysterophorus identified organic pollutants such as 9-octadecenoic acid, cyclotetradecane, 1-dodecene, 2,4-di-tert-butylphenol, pyrene, and 3-methyl-2-anthracenamine, many of which are endocrine-disrupting chemicals (EDCs) or carcinogens. After 50 days of sludge disposal, naturally growing plants, P. hysterophorus and C. sativa were observed on the site, coinciding with a reduction or transformation of certain organic pollutants, suggesting the potential role of indigenous plant-microbe interactions in pollutant degradation. These findings suggest role of rhizospheric bacterial communities in mediating pollutant degradation, highlighting their potential designing phytoremediation strategies for eco-restoration of distillery waste-polluted sites, not contributing but ensuring achievement of sustainable development goals.