{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T15:37:33Z","timestamp":1789141053730,"version":"build-2803163510"},"reference-count":55,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2023,11,21]],"date-time":"2023-11-21T00:00:00Z","timestamp":1700524800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["scijournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pest Management Science"],"published-print":{"date-parts":[[2024,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>BACKGROUND<\/jats:title><jats:p>Our previous findings indicated that <jats:italic>Bacillus velezensis<\/jats:italic> WB could control Fusarium wilt by changing the structure of the microbial community in the watermelon rhizosphere. However, there are few studies on its mechanism in the pathogen resistance of watermelon. Therefore, in this study, we determined the mechanism of <jats:italic>B.\u2009velezensis<\/jats:italic> WB\u2010induced systemic resistance in watermelon against Fusarium wilt through glasshouse pot experiments.<\/jats:p><\/jats:sec><jats:sec><jats:title>RESULTS<\/jats:title><jats:p>The results showed that <jats:italic>B.\u2009velezensis<\/jats:italic> WB significantly reduced the incidence and disease index of Fusarium wilt in watermelon. <jats:italic>B.\u2009velezensis<\/jats:italic> WB can enhance the basal immunity of watermelon plants by: increasing the activity of phenylalanine ammonia\u2010lyase (PAL), peroxidase (POD), superoxide dismutase (SOD) and \u03b2\u20101,3\u2010glucanase; accumulating lignin, salicylic acid (SA) and jasmonic acid (JA); reducing malondialdehyde (MDA) concentrations; and inducing callus deposition in watermelon plant cells. RNA\u2010seq analysis showed that 846 watermelon genes were upregulated and 612 watermelon genes were downregulated in the WF treatment. This process led to the activation of watermelon genes associated with auxin, gibberellin, SA, ethylene and JA, and the expression of genes in the phenylalanine biosynthetic pathway was upregulated. In addition, transcription factors involved in plant resistance to pathogens, such as MYB, NAC and WRKY, were induced. Gene correlation analysis showed that <jats:italic>Cla97C10G195840<\/jats:italic> and <jats:italic>Cla97C02G049930<\/jats:italic> in the phenylalanine biosynthetic pathway, and <jats:italic>Cla97C02G041360<\/jats:italic> and <jats:italic>Cla97C10G197290<\/jats:italic> in the plant hormone signal transduction pathway showed strong correlations with other genes.<\/jats:p><\/jats:sec><jats:sec><jats:title>CONCLUSION<\/jats:title><jats:p>Our results indicated that <jats:italic>B.\u2009velezensis<\/jats:italic> WB is capable of inducing systemic resistance in watermelon against Fusarium wilt. \u00a9 2023 Society of Chemical Industry.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ps.7873","type":"journal-article","created":{"date-parts":[[2023,11,8]],"date-time":"2023-11-08T13:44:19Z","timestamp":1699451059000},"page":"1423-1434","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["<i>Bacillus velezensis<\/i> WB induces systemic 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