ArticleFrontiers in microbiology2026
Microbial succession and tissue-specific restructuring of bacterial and fungal communities during post-harvest onion bulb rotting.
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
Despite being a relatively hardy bulb crop with a longer shelf life than many fresh vegetables, onions are susceptible to substantial postharvest losses due to microbial spoilage. This study used high-throughput amplicon sequencing to characterize the bacterial and fungal microbiomes associated with healthy (HB), mildly rotten (MRB), and severely rotten (SRB) onion bulbs. Microbial communities were analysed across three distinct bulb tissues comprising neck tissue (NT), outer scale (OS), and central tissue (CT), to generate stage-specific and tissue-specific microbiome profiles. The microbial community analysis based on over 2 million Illumina NGS reads revealed the presence of 85 bacterial OTUs and 53 fungal OTUs across nine bulb samples. Bulb deterioration was marked by pronounced microbial succession, with bacterial diversity increasing from healthy bulbs (8 genera) to mildly rotten bulbs (36 genera), followed by a sharp decline in severely rotten bulbs (11 genera). Several bacterial genera, including
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