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KMID : 1007520210300060869
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Food Science and Biotechnology
2021 Volume.30 No. 6 p.869 ~ p.880
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Colonization of Listeria monocytogenes in potting soils as affected by bacterial community composition, storage temperature, and natural amendment
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Yoon Jae-Hyun
Kim Sol-A
Shim Won-Bo
Seo Dong-Cheol
Choi Song-Yi
Lee Sun-Young
Kim Se-Ri
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Abstract
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This study aimed to characterize the bacterial community of commercial potting soils with or without Listeria monocytogenes inoculation at 5?35 °C using 16S metagenomic sequencing and evaluate the effect of natural amendments on the reduction L. monocytogenes in non-sterile potting soils. An increase in the expected operational taxonomic units of each sample with or without L. monocytogenes was proportional to the increasing storage temperatures after 5 days. Biodiversity was distinct among all potting soils for Shannon and inverse Simpson indices, with the highest diversity being observed in a soil sample stored at 35 °C for 5 days with L. monocytogenes. An increase in richness and diversity of soil bacterial community structure positively correlated with less survival of the invading L. monocytogenes. Particularly, garlic extract was demonstrated as a promising soil-amendment substrate, reducing L. monocytogenes by?≥?4.50 log CFU/g in potting soils stored at 35 °C.
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KEYWORD
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Bacterial community, Garlic extract amendment, Listeria monocytogenes, Potting soil, Soil chemical properties
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