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In this study, ten LAB isolates were screened and Lactiplantibacillus plantarum (L. plantarum) CLPX21 was selected as a candidate strain with its probiotic potential based on in vitro screening of antimicrobial activity and environmental stress tolerance, including its resistance to acidic environments and bile salts. This strain displayed adhesion capacity with an auto-aggregation rate of 47.15% at 24 h, co-aggregation rates above 67% with pathogenic bacteria, and an ability to adhere to IPEC-J2 cells (6.37%). CLPX21 showed broad-spectrum antimicrobial activity against common foodborne pathogens including Escherichia coli (E. coli), Salmonella, and Staphylococcus aureus. In addition, CLPX21 inhibited E. coli biofilm formation. Furthermore, CLPX21 significantly suppressed E. coli-induced inflammatory cytokine production in mouse peritoneal macrophages. Importantly, CLPX21 did not exhibit hemolytic activity. Genomic analysis further revealed that the CLPX21 genome encoded multiple functional genes and gene clusters, including biosynthesis of bacteriocins and secondary metabolites associated with antimicrobial and antioxidant functions, which provide a genetic basis for its beneficial phenotypic characteristics. In conclusion, L. plantarum CLPX21 displays probiotic properties with potent antimicrobial and anti-inflammatory activities, representing a promising candidate strain for applications in the food and health industries.<\/jats:p>","DOI":"10.3390\/microorganisms14081789","type":"journal-article","created":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T08:08:29Z","timestamp":1786694909000},"page":"1789","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Whole-Genomic and Functional Characterization of Lactiplantibacillus plantarum CLPX21 as Potent Probiotic Candidate"],"prefix":"10.3390","volume":"14","author":[{"given":"Shichao","family":"Xu","sequence":"first","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qianqian","family":"Fan","sequence":"additional","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongdou","family":"Liu","sequence":"additional","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yilin","family":"Lu","sequence":"additional","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuqian","family":"Liu","sequence":"additional","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhouyuan","family":"Wang","sequence":"additional","affiliation":[{"name":"Kunming Hemeihua Feed Limited Company, Kunming 682100, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yunxia","family":"Li","sequence":"additional","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rendong","family":"Fang","sequence":"additional","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiwei","family":"Li","sequence":"additional","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9005-3186","authenticated-orcid":false,"given":"Lianci","family":"Peng","sequence":"additional","affiliation":[{"name":"Joint International Research Laboratory of Animal Health and Animal Food Safety, College of Veterinary Medicine, Southwest University, Chongqing 400715, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"110240","DOI":"10.1016\/j.ijfoodmicro.2023.110240","article-title":"Food safety incidents in the red meat industry: A review of foodborne disease outbreaks linked to the consumption of red meat and its products, 1991 to 2021","volume":"398","author":"Warmate","year":"2023","journal-title":"Int. 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