ArticleEnvironmental microbiome2025
Intercropping-mediated enrichment of core microbiome enhances suppression of Verticillium wilt in cotton.
Article in Environmental microbiome, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundVerticillium wilt, caused by Verticillium dahliae Kleb., is a devastating soilborne disease threatening global cotton production. Intercropping is a sustainable agricultural practice known to suppress soilborne diseases, yet the microbiome-mediated mechanisms underlying its efficacy against Verticillium wilt remain poorly understood.
resultsA three-year field trial (2019-2021) showed that intercropping cotton with mustard significantly reduced Verticillium wilt severity (32.11-39.2%), increased yield (13.88-23.22%), and lowered soil microsclerotia density. Intercropping reshaped soil microbial communities and enriched a core set of beneficial taxa compared to monocropping, generating more complex and cooperative rhizosphere networks during flowering and boll stage. We then constructed an intercropping-enriched synthetic community (IC-SynCom) from the enriched core microbiotas with multiple beneficial traits; this consortium, comprising Bacillus altitudinis strain CRB-021, Lysobacter firmicutimachus strain CRB-253, Rhizobium soli strain CRB-314, Enterobacter hormaechei strain CRB-070, and Pantoea sp. strain CRB-006, achieved the highest control efficacy at 72.83 ± 1.31%, promoted cotton growth, and outperformed single-strain inoculants. qRT-PCR further showed that IC-SynCom activated systemic plant defenses by the upregulation of key defense-related genes, including phenylalanine ammonia-lyase (GhPAL), cinnamate 4-hydroxylase (GhC4H1), pathogenesis-related protein 10 (GhPR10), peroxidase (GhPOD), and β-1,3-glucanase (Ghβ-1,3-glucanase), which are involved in salicylic acid signaling and lignin biosynthesis.
conclusionsOur findings demonstrate that intercropping enhances soil's capacity to suppress Verticillium wilt by reshaping root-associated microbiomes. A core consortium of intercropping-enriched beneficial microbes (IC-SynCom) effectively suppresses Verticillium wilt through direct antagonism and activation of plant immunity. These results highlight the potential of microbiome-based strategies for sustainable management of soilborne diseases.
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