ArticleScientific reports2026
Endophytic bacteria associated with turmeric, ginger and white radish exhibit dual roles as producers of antibacterial metabolites and carriers of multidrug resistance.
Article in Scientific reports, 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
The increasing global burden of antimicrobial resistance (AMR) necessitates the exploration of unconventional microbial niches for novel bioactive compounds. Simultaneously, it is also necessary to evaluate their role in the dissemination of resistant bacteria through the food chain. Endophytic bacteria inhabiting edible plant tissues represent a largely underexplored interface between environmental microbiota and human exposure. In this exploratory study, endophytic bacteria were isolated from fresh rhizomes of Zingiber officinale (ginger), Curcuma longa (turmeric), and Raphanus sativus (white radish), and characterized for their antimicrobial activity and antibiotic resistance profiles. A total of 24 endophytic bacterial isolates were isolated from fresh rhizomes of turmeric, ginger and white radish using tissue segmentation method. Among them, eight isolates (33.33%) exhibited weak to strong inhibitory activity against multidrug-resistant clinical pathogens, including Escherichia coli, Escherichia fergusonii, Shigella spp., Staphylococcus aureus, and Bacillus cereus. Molecular identification based on 16S rRNA gene sequencing revealed that the isolate RD-1(b) was affiliated with Burkholderia contaminans and TM-4(b) and RD-2(c) with Enterobacter cloacae. Crude extracellular metabolites extracted from the RD-1(b) retained broad-spectrum antibacterial activity. Notably, these isolates demonstrated resistance to multiple antibiotics, including β-lactams, macrolides, and tetracyclines, while remaining susceptible to selected agents such as ciprofloxacin and cotrimoxazole. The coexistence of antimicrobial activity and multidrug resistance within endophytic bacteria highlights their dual role as both potential sources of bioactive metabolites and reservoirs of AMR determinants. Given that these rhizomes are commonly consumed raw or minimally processed, the presence of such bacteria potentially raises food safety concerns. The possible beneficial role of these endophytes should also be explored.
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