Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (2): 426-437.DOI: 10.3969/j.issn.1004-1524.20240034

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Identification of yellow rot disease of Pleurotus pulmonarius and analysis of its pathogenicity-related transcriptome

LU Na(), WANG Weike(), LIN Jiayao, ZHOU Zufa   

  1. Hangzhou Academy of Agricultural Sciences, Hangzhou 310024, China
  • Received:2024-01-04 Online:2025-02-25 Published:2025-03-20
  • Contact: WANG Weike

Abstract:

Yellow rot disease has a serious impact on the yield and quality of Pleurotus pulmonarius in the factory production mode. In the present study, pathogenic bacteria were isolated and purified from diseased samples. The pathogenicity of pathogenic bacteria were determinated by Koch postulates. Morphological characteristics and 16S rRNA sequences were used for pathogen identification, and their characteristic properties were analyzed by mycelium growth rate and transcriptome. It was shown that the isolated strains CAJ01-D, CAJ06-C, TXX01 and LAD07 could cause yellow rot disease, which were different species of Pseudomonas spp. The treatment using different Pseudomonas strains impacted the growth rate of P. pulmonarius mycelia, but there was no significant difference in mycelium growth vigor. There was difference in the expression of pathogenicity-related genes when P. pulmonarius was infected by Pseudomonas strains, but most of the differentially expressed genes under the infection of strains LAD07 and CAJ06-C were down-regulated. The clustering and enrichment of GO and KEGG functions showed that the cytochrome c reductase was down-regulated and mitochondrial respiration was weakened by the infection of LAD07 strain. The CAJ06-C strain caused down-regulation of glycolysis or gluconeogenesis, tyrosine metabolism and phenylalanine metabolism. It was speculated that the LAD07 and CAJ06-C strains hindered the growth and development of the fruiting body of P. pulmonarius, which was consistent with the observed severe disease symptoms, including yellowing, water stain and developmental arrest of the fruiting body under infection.

Key words: Pleurotus pulmonarius, yellow rot disease, Pseudomonas, molecular identification

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