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In the coevolution of cotton and pathogenic fungi, resistant cotton varieties lead to an escalation in the virulence of Verticillium dahliae

文献类型： 外文期刊

作者： Zhang, Yalin 1 ; Cui, Lifang 1 ; Liu, Ruibing 1 ; Feng, Zili 1 ; Feng, Hongjie 1 ; Zhou, Jinglong 1 ; Zhao, Lihong 1 ; Wei, Feng 1 ; Zhu, Heqin 1 ;

作者机构： 1.Chinese Acad Agr Sci, State Key Lab Cotton Biobreeding & Integrated Util, Inst Cotton Res, Anyang 455000, Peoples R China

2.Chinese Acad Agr Sci, Western Agr Res Ctr, Changji 831100, Peoples R China

3.Hebei Agr Univ, Hebei Res Base State Key Lab Cotton Biobreeding &, State Key Lab North China Crop Improvement & Regul, Baoding 071000, Peoples R China

关键词： Cotton; Host-pathogen interaction; Pathogenicity gene; Verticillium dahliae; Virulence variation

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.1； 五年影响因子：6.4 ）

ISSN： 0147-6513

年卷期： 2025 年 290 卷

页码：

收录情况： SCI

摘要： Verticillium dahliae is highly prone to pathogenic differentiation and influenced by host cotton's resistance. To better understand the mechanisms of this phenomenon, we applied the host selective pressures of resistant and susceptible cotton varieties on V. dahliae strain Vd076 within an artificial cotton Verticillium wilt nursery and greenhouse. Consequently, among the offspring strains, high virulence strains exhibited higher levels of physiological characteristics and genetic diversity compared to moderate and low virulence strains. Moreover, whole genome resequencing revealed that the Ka/Ks ratio of single nucleotide polymorphism (SNPs) in the majority of the offspring strains was about 0.6, indicating an adverse selection impact in the offspring strains. Pathogenicity assays demonstrated that the virulence of the offspring strains triggered by continuous induction of disease- resistant cotton cultivar increased from the 4th generation and reached its peak by the 6th generation. Additionally, the transcriptome analysis revealed that the 4th and 6th generations of strains differentially expressed genes (DEGs) accumulated a significant number of response genes associated with pathogen pathogenicity differentiation, including the mitogen-activated protein kinase (MAPK) signaling pathway, amino and antibiotic biosynthesis, phenylpropanoid metabolism. Furthermore, VDAG_04757, VDAG_06462, VDAG_03218, and VDAG_08487 genes exhibited significant correlation with the pathogenicity of V. dahliae. Collectively, this study has significant implications for elucidating the evolution of virulence in V. dahliae induced by the host, as well as for advancing holistic strategies for preventing and managing Verticillium wilt disease.

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