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Acta Horticulturae Sinica ›› 2021, Vol. 48 ›› Issue (5): 860-872.doi: 10.16420/j.issn.0513-353x.2020-0578

• Research Papers • Previous Articles     Next Articles

Analysis of Resistance Mechanism to Powdery Mildew Based on Transcriptome Sequencing in Malus hupehensis

LAN Liming1, LUO Changguo2,*(), WANG Sanhong1,*()   

  1. 1Laboratory of Fruit Tree Biology,College of Horticulture,Nanjing Agricultural University,Nanjing 210018,China
    2Institute of Fruits Sciences,Guizhou Academy of Agricultural Sciences,Guiyang 550006,China
  • Received:2020-09-08 Revised:2021-03-05 Online:2021-05-25 Published:2021-06-07
  • Contact: LUO Changguo,WANG Sanhong E-mail:376258195@qq.com;wsh3xg@niau.edu.cn

Abstract:

To explore the pathways and mechanism of response to powdery mildew in Malus hupehensis(Pamp.)Rehder,we used the BGISEQ-500 sequencing technology and de novo transcriptome assembly to gain a comprehensive overview of the transcriptome of the leaves of‘Qingzhen 1’, ‘Qingzhen 1’/Malus hupehensis and M. hupehensis after the outbreak of powdery mildew in the same period. The resistance to powdery mildew of three materials increased in turn. Gene Ontology(GO)enrichment showed significant enrichment of GO term associated with metabolic process and catalytic activity in Qingzhen 1,Qingzhen 1/Malus hupehensis and M. hupehensis. KEGG analysis showed linoleic acid metabolism,plant-pathogen interaction,inositol phosphate metabolism,brassinosteroid biosynthesis and phosphatidylinositol signaling system etc. were significantly enriched in Qingzhen 1/Malus hupehensis and resistance to powdery mildew,respectively. And the carbon metabolism pathway was only significantly enriched in M. hupehensis. Expression analysis of genes related to the resistance to powdery mildew showed that WRKY70,WRKY33,NPR3and WRKY40 were significantly up-regulated in Qingzhen 1/Malus hupehensis and M. hupehensis compared to Qingzhen 1. The accuracy of sequencing were confirmed by qRT-PCR experiment.

Key words: apple, Malus hupehensis, rootstock, rootstock-scion interaction, powdery mildew, transcriptome, differentially expressed

CLC Number: