Persistence of Salmonella Typhimurium in apple-pear (Pyrus bretschneideri Rehd.) orchard soils influenced by bacterial communities and soil properties

Jiafen Liao; Jiahang Li; Ziming Han; Guangze Lyu; A Mark Ibekwe; Jincai Ma

doi:10.1016/j.scitotenv.2020.144458

Persistence of Salmonella Typhimurium in apple-pear (Pyrus bretschneideri Rehd.) orchard soils influenced by bacterial communities and soil properties

Sci Total Environ. 2021 May 10:768:144458. doi: 10.1016/j.scitotenv.2020.144458. Epub 2021 Jan 9.

Authors

Jiafen Liao¹, Jiahang Li², Ziming Han³, Guangze Lyu², A Mark Ibekwe⁴, Jincai Ma⁵

Affiliations

¹ Key Laboratory of Ground Water Resource and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China.
² Key Laboratory of Ground Water Resource and Environment, Ministry of Education, Jilin University, Changchun 130021, China.
³ State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
⁴ USDA-ARS, U.S. Salinity Laboratory, Riverside, CA 92507, USA.
⁵ Key Laboratory of Ground Water Resource and Environment, Ministry of Education, Jilin University, Changchun 130021, China; Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun 130021, China. Electronic address: jincaima@jlu.edu.cn.

PMID: 33444864
DOI: 10.1016/j.scitotenv.2020.144458

Abstract

2In this study, we investigated the persistence of Salmonella Typhimurium in 26 soil samples from apple-pear orchards in Yanji, Longjing and Helong in northeastern China. The time to reach detection limit (ttds) of Salmonella Typhimurium in soils varied from 20 to 120 days. Redundancy analysis and variation partition analysis elucidated that bacterial communities, clay content, pH, electrical conductivity (EC) salinity, and NO₃^--N could explain more than 85% of overall variation of the persistence behaviors. Results of structural equation models and Mantel tests revealed that clay content and EC displayed both direct and indirect effect on ttds, while NO₃^--N and pH exhibited direct and indirect effect on the survival patterns, respectively. Furthermore, Actinobacteria, Acidobacteria and Deltaproteobacteria at class level showed highly close correlations with ttds. Our results revealed that certain biotic and abiotic factors could greatly contribute to the overall persistence of Salmonella in apple-pear orchard soils.

Keywords: Mantel test; Redundancy analysis; Structural equation model; Survival.

Published by Elsevier B.V.

MeSH terms

China
Malus*
Pyrus*
Salmonella typhimurium
Soil
Soil Microbiology

Substances

Soil