我国西部天然草原植物真菌病害调查研究

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中图分类号：S812 文献标识码：A 文章编号：1007-0435（2025）09-2765-12

Investigation and Research on PlantFungal DiseasesofNatural GrasslandinWesternChina

XU Ling-ling 1，2 ，LIU Jia-qi1²，LONG Jia-hui1，XUELong-hail*，LI Chun-jie 1，2

（1.StateKeyLaboratoryofHerbgeImprovementandGrassandAgroecosystems;CenterfoGrasslandMicrobiome;CollgeofPastoral AgricultureSieedUesitosroena；asadeahtl Forestryaddssieldstd 3.InstuteofAgriculturalResourcsandEnvironment，ichancadeyofAgiculturalSienes，Chengdu，icuanProi6）

Abstract：Inorder to understand thespecies and distribution characteristicsoffungal diseases in natural grassland in western China，this study collected 1728 diseased plants from typical grassland areas in Gansu，Ningxia and Sichuan from July to September in 2O21-2O23，2717 fungal strains were isolatedand cultured，and three representative strains were screened for multi-gene （RPB2/TUB2/TEF1） identification based on morphology and ITS sequence identification，and pathogenicity was determined.The results showed that the most abundant fungi at the family level were Didymellaceae，with a total of 7O4 strains，folowed by Phaeosphaeriaceae with 226 strains; At the genus level，Didymella，Neoascochyta，and Parastagonospora had a wide host range， accounting for 7% ， 4% and 4% of the total，respectively. Three representative strains MQ42，N25 and N72 were screened as D . pomorum，N. cylindrispora and P . nodorum，respectively，with the strongest pathogenicity of P ：nodorum. In addition，28 new records of grassland plant diseases hosts were discovered worldwide.This study has improved the database of fungal diseases in natural grassland in China，which is of great value to promote the health and sustainable development of natural grassand ecosystems in western China.

Key words：Natural grassland ;Fungal diseases; Representative strains ; Pathogenicity

天然草原是重要的陆地生态系统之一，不仅提供了丰富的牧草资源，还在水土保持、防风固沙以及维持生态系统平衡中发挥着重要作用[1-3]。（剩余24870字）