ArticleWorld journal of microbiology & biotechnology2025
Identification and comprehensive genomic characterization of cellulolytic Bacillus species reveal unique CAZyme profiles for leaf litter degradation and compost production.
Article in World journal of microbiology & biotechnology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Genomic sequencing of vineyard-isolatedFrontiers in microbiology · 2026Article
- You are what your fungus eats: diet shapes the microbial garden of a fungus-growing ant.NPJ biofilms and microbiomes · 2025Article
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Authors and funding
7 authors.
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Abstract
Leaf litter, abundant in lignocellulosic materials, is difficult to degrade, hindering efficient composting in agriculture. This study focused on isolating and identifying Bacillus species with strong cellulolytic activity to improve leaf litter decomposition under subtropical agro-climatic conditions. Three bacterial strains, B1S, B1M, and B1D were isolated from composted leaf litter and characterized through morphological, biochemical, and enzymatic analyses. B1S, identified as Bacillus stercoris, exhibited the highest total cellulase (0.818 ± 0.026 fpu/ml) and endoglucanase (25.674 ± 2.085 CMCase/mL) activities. B1D showed the highest β-glucosidase activity (3.561 ± 0.088 IU/mL). Optimal cellulase activity for B1S occurred at pH 5.0 and 37 °C. Inoculating compost piles with a mix of these strains significantly reduced composting time from 100 to 50 days, with a cellulose degradation rate of 45.18%. The study included whole genome sequencing of B1S (~ 4.2 Mb, 4184 coding sequences), revealing genes encoding key carbohydrate-active enzymes (CAZymes) such as glycoside hydrolases (GH5), carbohydrate-binding modules (CBM3), and auxiliary activity enzymes (AA), confirming its lignocellulolytic capacity. Taxonomic analysis using TYGS and genome-wide phylogeny validated its identity as Bacillus stercoris. Functional annotations through RAST, KEGG, and COG databases indicated enrichment in genes related to carbohydrate and amino acid metabolism, quorum sensing, and environmental adaptation. The presence of unique gene clusters and mobile genetic elements suggests genomic flexibility. These findings demonstrate the potential of Bacillus stercoris as a valuable microbial tool for sustainable composting and underscore the importance of genome-based approaches in microbial functional and taxonomic studies.
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