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Acta Horticulturae Sinica ›› 2026, Vol. 53 ›› Issue (9): 2621-2638.doi: 10.16420/j.issn.0513-353x.2025-0505

• Genetic & Breeding · Germplasm Resources · Molecular Biology • Previous Articles     Next Articles

Transcriptome Analysis of Potato Response to Pectobacterium atrosepticum Stress

LUO Jinjun, HOU Lijuan, WANG Fei, MA Yongqiang*()   

  1. Academy of Agriculture and Forestry Sciences,Qinghai University; Qinghai Key Laboratory of Agricultural Integrated Pest Management, Xining 810016, China
  • Received:2026-02-04 Revised:2026-05-20 Online:2026-09-25 Published:2026-09-20
  • Contact: MA Yongqiang

Abstract:

Potato blackleg is one of the major diseases causing a decline in potato quality and yield,seriously threatening the healthy development of the potato industry. Pectobacterium atrosepticum was inoculated into plants of the resistant potato cultivar‘Longshu 19’,and RNA-Seq technology was used to explore the molecular mechanisms underlying the response of potato to Pectobacterium atrosepticum infection and to screen for key differentially expressed genes. The analysis results showed that compared with the control,436,20 411,and 3 759 differentially expressed genes(DEGs)were identified at 1,3,and 5 days post-inoculation,respectively,among which 77 were common DEGs. GO and KEGG enrichment analyses revealed that DEGs at 1 day post-inoculation were mainly enriched in lyase activity and secondary metabolite biosynthetic pathways;DEGs at 3 days were mainly enriched in catalytic activity and carbon metabolism pathways;and DEGs at 5 days were significantly associated with oxidoreductase activity and small molecule metabolic processes. Functional annotation of the 18 common DEGs enriched in metabolic pathways indicated that they encode defense-related proteins such as chitinase,peroxidase,and flavanone-3-hydroxylase. Screening for core pathways and core genes identified one core gene encoding flavanone-3-hydroxylase(Soltu.Q9. Chr02_A20006400.g,)and three transcription factors(belonging to the HD-ZIP and MYB families),among which StMYB1 may be a negative regulator of plant defense responses.

Key words: potato, blackleg disease, Pectobacterium atrosepticum, transcriptome analysis, differentially expressed gene

CLC Number: