Acta Agriculturae Zhejiangensis ›› 2023, Vol. 35 ›› Issue (12): 2763-2774.DOI: 10.3969/j.issn.1004-1524.20221667

• Crop Science • Previous Articles     Next Articles

Effects of the D3 gene on transcriptional regulation and its role in defense responses

XU Yue1,2(), WANG Shaomin3, TAN Xiaojing1,2, LUO Yingjie1,2, CHANG Jingyi2, DENG Hui2, LIU Xiuli2, CUI Weijun2, ZHOU Jie2, WU Yueyan1, YAN Chengqi1,4,*(), WANG Xuming2,*()   

  1. 1. College of Biology and Environment, Zhejiang Wanli University, Ningbo 315100, Zhejiang, China
    2. State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    3. Agricultural Technology Extension and Service Station of Yuyao City, Yuyao 315400, Zhejiang, China
    4. Ningbo Academy of Agricultural Sciences, Ningbo 315100, Zhejiang, China
  • Received:2022-11-22 Online:2023-12-25 Published:2023-12-27

Abstract:

Bacterial leaf blight is a bacterial disease caused by Xanthomonas oryzae pv. oryzae (Xoo). Bacterial leaf blight can severely reduce rice yields. With the development of molecular biotechnology, editing potential disease resistance genes has become a method to improve rice disease resistance and reduce the loss of the disease. In this study, D3 gene edited lines and wild-type inoculation experiments were used to determine D3 gene resistance and high-throughput sequencing technology was employed to analyze the transcriptomes of three different D3 gene-edited lines, and the results showed that compared with the wild type, D3 gene was significantly induced, while the D3 edited lines showed different degrees of blight resistance and a total of 8 184 DEGs were identified at the transcriptome level, including 4 201 up-regulated genes and 3 983 down-regulated genes, among which 359 DEGs were found simultaneously differentially expressed in the three groups. After that, this part of differentially expressed genes (DEGs) was verified by quantitative PCR. GO functional enrichment analysis showed that the genes related to biological pathways, cellular components and molecular functions were significantly differentially expressed in D3 gene-edited lines compared with the wild-type. KEGG pathway enrichment analysis found that DEGs were significantly enriched in plant-pathogen interaction, plant hormone signal transduction and phenylpropane biosynthesis pathways. Further experiments showed that, compared with the wild type, pathogen-related genes (PRs) in D3 gene-edited lines were significantly induced after inoculation with Xoo, and D3 gene-edited lines showed different degrees of bacterial blight resistance, thus further confirmed the role of D3 in bacterial blight resistance. This study enriches the role of the rice D3 gene in affecting transcriptional regulation, especially its impact on plant disease resistance-related genes. At the same time, this study expands the ideas for the research on the disease resistance mechanism of D3 gene.

Key words: rice, bacterial blight, D3 gene, transcriptome analysis, differentially expressed genes

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