Comprehensive Analysis of Copy Number Variations on Glycoside Hydrolase 45 Genes among Different Bursaphelenchus xylophilus Strains

• Published in: International journal of molecular sciences Vol. 23; no. 23; p. 15323
• Main Authors: Ding, Xiaolei, Zhao, Ruiwen, Dai, Yonglin, Zhang, Yue, Lin, Sixi, Ye, Jianren
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 05.12.2022; MDPI
• Subjects: Animals; Bursaphelenchus xylophilus; Cell walls; Copy number; copy number variation; DNA Copy Number Variations; Ecological effects; Gene expression; Genes; Genomes; Glycosidases; Glycoside hydrolase; glycoside hydrolase 45; Glycoside Hydrolases - genetics; Glycosides; Hydrolase; Infections; Inoculation; Pathogenesis; Pathogenicity; Pinus; Plant Diseases; Rhabditida; Tylenchida - genetics; Wilt; North America; copy number variation; Bursaphelenchus xylophilus; gene expression; glycoside hydrolase 45
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms232315323

is considered the most dangerous quarantine pest in China. It causes enormous economic and ecological losses in many countries from Asia and Europe. The glycoside hydrolase 45 gene family has been demonstrated in early studies to contribute to the cell wall degradation ability of during its infection. However, the copy number variation (CNV) of the GH45 gene and its association with pathogenicity were not fully elucidated. In this study, we found that the GH45 gene with two copies is the most predominant type among 259 strains collected from China and Japan. Additionally, 18 strains are identified as GH45 genes with a single copy, and only two strains are verified to have three copies. Subsequent expression analysis and inoculation test suggest that the copy numbers of the GH45 gene are correlated with gene expression as well as the pathogenicity. strains with more copies of the GH45 gene usually exhibit more abundant expression and cause more severe wilt symptoms on pine trees. The aforementioned results indicated the potential regulatory effects of CNV in and provided novel information to better understand the molecular pathogenesis of this devastating pest.