Acta Agriculturae Boreali-Sinica ›› 2025, Vol. 40 ›› Issue (1): 93-103. doi: 10.7668/hbnxb.20195347

Special Issue: Plant protection Biotechnology

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Genome-wide Characterization of WRKY Gene Family in Hydrangea macrophylla and Expression Analysis in Response to Leaf Spot Disease

LIU Xintong1, CHEN Huijie1, CHEN Shuangshuang1, FENG Jing1, QI Xiangyu1, ZHOU Huimin1, JIN Yuyan1, SUN Ming2, DENG Yanming1,2,   

  1. 1 Jiangsu Provincial Key Laboratory for the Genetics and Improvement of Horticultural Crops,Institute of Leisure Agriculture,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China
    2 State Key Laboratory of Efficient Production of Forest Resources,Beijing Forestry University,Beijing 100083,China
  • Received:2024-08-13 Published:2025-02-28

Abstract:

To understand the member characteristics of the WRKY transcription factor family in hydrangea and their roles in response to leaf spot disease,this study utilized the bioinformatics method to characterize WRKY family members in Hydrangea macrophylla Endless Summer,and systematically analyzed the protein physicochemical features,gene structure,systematic evolution,collinearity and expression patterns under the infection with Corynespora cassiicola of WRKY family members.The results showed that there were 84 non-redundant HmWRKY members in H.macrophylla genome.All of the HmWRKYs were hydrophilic proteins and unevenly distributed on 18 chromosomes of H.macrophylla,encoding 112—1 046 amino acids.In addition,HmWRKY members were divided into 3 subgroups(Group Ⅰ—Group Ⅲ),which contained a conserved DNA binding domain composed of WRKYGQK and C2H2.The sequence length of HmWRKY varies greatly from 512 bp to 40 338 bp,and 8 collinear gene pairs with Ka/Ks ratios less than 1 were detected,indicating that the HmWRKY family experienced purification selection in evolution.18 HmWRKY members showed significantly differential expression after infection with C.cassiicola,of which 9 up-regulated and 9 down-regulated.The results indicated that these HmWRKY genes might play important roles in response to leaf spot disease of hydrangea.

Key words: Hydrangea macrophylla, WRKY gene family, Transcription factor, Leaf spot disease, Corynespora cassiicola

Cite this article

LIU Xintong, CHEN Huijie, CHEN Shuangshuang, FENG Jing, QI Xiangyu, ZHOU Huimin, JIN Yuyan, SUN Ming, DENG Yanming. Genome-wide Characterization of WRKY Gene Family in Hydrangea macrophylla and Expression Analysis in Response to Leaf Spot Disease[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(1): 93-103. doi: 10.7668/hbnxb.20195347.

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