Compost from urban biowaste shapes the bacterial community and its functional traits in the rhizosphere of tomato plants
- 1University of Padova, Dep. of Biology and Botanical Garden, Padova, IT
Abstract
Industrial compost derived from urban biowaste is a sustainable biofertilizer made from food waste and plant matter. It has long been used as a fertilizer in agriculture and horticulture for its rich nutrient content. However, the composition of the microbiota in industrial biowaste compost has been studied only partially, and the effects of this bacterial community on soil, rhizosphere, and plant root communities have received limited attention. In this study, we conducted community and functional analyses to examine how the microbiota in biowaste compost influences bacterial diversity, community composition, and metabolic potential in tomato plants, compared with plants fertilized with conventional, unsustainable chemical fertilizer. Source contribution analysis tracking bacterial taxa indicated a significant contribution of compost-derived taxa to the soil, rhizosphere, and roots. The community analysis revealed distinct clustering by fertilizer type, with biowaste compost promoting a unique, more diverse rhizosphere community, enriched in Firmicutes species. Functional analysis highlighted increased microbial pathways in the rhizosphere treated with biowaste compost, including enzymes for cellulolytic and xylanolytic activity, nitrogenase, phytase, and 1-ACC deaminase. Overall, food-derived industrial biowaste compost enhances bacterial diversity and the predicted functional and plant growth-promoting potential in the rhizosphere of tomato plants, underscoring its potential as a sustainable biofertilizer that supports soil health, microbial biodiversity, and crop productivity.
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BibTeX
@misc{cipriani2026compost,
title = {{Compost from urban biowaste shapes the bacterial community and its functional traits in the rhizosphere of tomato plants}},
author = {R. Cipriani and N. De Biasio and M. Labouyrie and G. Ghirardello and W. Zanardi and T. Bonato and B. Baldan and S. Nigris},
howpublished = {bioRxiv},
year = {2026},
month = oct,
doi = {10.64898/2026.10.28.762700},
url = {https://www.biorxiv.org/content/10.64898/2026.10.28.762700v1},
note = {CC BY-NC-ND},
}
RIS
TY - UNPB
TI - Compost from urban biowaste shapes the bacterial community and its functional traits in the rhizosphere of tomato plants
AU - R. Cipriani
AU - N. De Biasio
AU - M. Labouyrie
AU - G. Ghirardello
AU - W. Zanardi
AU - T. Bonato
AU - B. Baldan
AU - S. Nigris
PY - 2026
DA - 2026/10/28
PB - bioRxiv
DO - 10.64898/2026.10.28.762700
UR - https://www.biorxiv.org/content/10.64898/2026.10.28.762700v1
AB - Industrial compost derived from urban biowaste is a sustainable biofertilizer made from food waste and plant matter. It has long been used as a fertilizer in agriculture and horticulture for its rich nutrient content. However, the composition of the microbiota in industrial biowaste compost has been studied only partially, and the effects of this bacterial community on soil, rhizosphere, and plant root communities have received limited attention. In this study, we conducted community and functional analyses to examine how the microbiota in biowaste compost influences bacterial diversity, community composition, and metabolic potential in tomato plants, compared with plants fertilized with conventional, unsustainable chemical fertilizer. Source contribution analysis tracking bacterial taxa indicated a significant contribution of compost-derived taxa to the soil, rhizosphere, and roots. The community analysis revealed distinct clustering by fertilizer type, with biowaste compost promoting a unique, more diverse rhizosphere community, enriched in Firmicutes species. Functional analysis highlighted increased microbial pathways in the rhizosphere treated with biowaste compost, including enzymes for cellulolytic and xylanolytic activity, nitrogenase, phytase, and 1-ACC deaminase. Overall, food-derived industrial biowaste compost enhances bacterial diversity and the predicted functional and plant growth-promoting potential in the rhizosphere of tomato plants, underscoring its potential as a sustainable biofertilizer that supports soil health, microbial biodiversity, and crop productivity.
ER -