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Bacterial Community Assembly and Antibiotic Resistance Genes in the Lettuce-soil System Upon Antibiotic Exposure by Yike Shen; Elliot T. Ryser; Hui Li; Wei Zhang is a Environmental Science article available to read on EtoBox.

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Bacteria and antibiotic resistance genes (ARGs) in vegetables may influence human gut microbiome and ultimately human health. However, little is known about how vegetable microbiomes and ARGs respond to exposure of anthropogenic antibiotics from crop irrigation water. This study investigated bacterial community assembly and ARG profiles in lettuce (Lactuca sativa) shoots and roots, rhizosphere soil, and bulk soil irrigated with antibiotics-containing water, using 16S rRNA amplicon sequencing and high throughput real-time qPCR, respectively. With antibiotic exposure alpha diversity values remained unchanged for the rhizosphere soil and lettuce roots, but were significantly decreased for the bulk soil and lettuce shoots (p < 0.05). Based on calculations of normalized stochastic ratio (NST), bacterial community assembly was more stochastic in the rhizosphere soil (83%–86%) and bulk soil (81%–84%) than in the lettuce roots (45%–48%). These results suggest a stronger deterministic control of plant roots in bacterial community assembly. Antibiotic exposure did not substantially change the stochasticity of the bacterial communities, despite the NST values were significantly increased by ~

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Author

Yike Shen; Elliot T. Ryser; Hui Li; Wei Zhang

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Environmental Science (Physical Sciences)