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Characterization, Phylogenetic Analyses, and Pathogenicity of Eutiarosporella dactylidis on Sorghum in China

文献类型： 外文期刊

作者： Zhang, Xiaojie 1 ; Wang, Linying 2 ; Yang, Tianyu 3 ; Shi, Shangli 1 ; Guo, Cheng 2 ;

作者机构： 1.Gansu Agr Univ, Pratacultural Coll, Sino US Ctr Grazing Land Ecosyst Sustainabil, Key Lab Grassland Ecosyst,Minist Educ, Lanzhou 730070, Peoples R China

2.Gansu Acad Agr Sci, Inst Plant Protect, Lanzhou 730070, Peoples R China

3.Gansu Acad Agr Sci, Inst Crops, Lanzhou 730070, Peoples R China

关键词： Eutiarosporella dactylidis; Eutiarosporella leaf blight; identification; pathogenicity; sorghum

期刊名称：PLANT DISEASE （ 影响因子：4.4； 五年影响因子：4.8 ）

ISSN： 0191-2917

年卷期： 2025 年 109 卷 2 期

页码：

收录情况： SCI

摘要： Sorghum, the fifth-largest cereal crop globally and a C4 crop, mainly grows in arid and semiarid areas. In 2021 to 2023, a new foliar disease of sorghum occurred in China. The diseased leaves showed water-soaked symptoms in the leaf tip and margins, resulting in half- and full-leaf desiccation and necrosis, thus affecting plant photosynthesis. A total of 24 Eutiarosporella strains were isolated from symptomatic leaves. Based on morphological characteristics, multilocus phylogenetic analysis involving ITS, LSU, and EF1-alpha sequences, and the pathogenicity test, the pathogen of sorghum causing leaf blight in China was identified as Eutiarosporella dactylidis. The virulence of all E. dactylidis strains was evaluated using the spray-mycelium method. Different strains showed significantly different pathogenicities toward a susceptible cultivar, Longza 10, with disease indexes ranging from 23.76 to 60.37. This study first reported leaf blight of sorghum caused by E. dactylidis and named it "Eutiarosporella leaf blight," which provides a theoretical basis for farmers in disease management.

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