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Molecular Identification and Pathogenicity of Diaporthe eres and D. hongkongensis (Diaporthales, Ascomycota) Associated with Cherry Trunk Diseases in China

文献类型： 外文期刊

作者： Chen, Pengzhao 1 ; Abeywickrama, Pranami D. 1 ; Ji, Shuxian 1 ; Zhou, Yueyan 1 ; Li, Xinghong 1 ; Zhang, Wei 1 ; Yan, Jiye 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plant Protect, Beijing Key Lab Environm Friendly Management Fruit, Beijing 100097, Peoples R China

2.Mae Fah Luang Univ, Ctr Excellence Fungal Res, Chiang Rai 57100, Thailand

3.Mae Fah Luang Univ, Sch Sci, Chiang Rai 57100, Thailand

关键词： Diaporthaceae; trunk disease; Koch's postulates; new record; phylogeny; Prunus; stone fruits

期刊名称：MICROORGANISMS （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN：

年卷期： 2023 年 11 卷 10 期

页码：

收录情况： SCI

摘要： This study aimed to identify fungal species associated with trunk diseases of sweet cherries (Prunus avium) in several commercial cherry orchards in Beijing, Guizhou and Shandong provinces, China. In total, eighteen fungal strains that fitted well into the species concept of Diaporthe were isolated. Based on both morphological and multi-locus phylogenetic analyses of internal transcribed spacer region (ITS), beta-tubulin (tub-2), calmodulin (Cal) and translation elongation factor 1-alpha (tef1-alpha) sequencing data, fourteen isolates were identified as Diaporthe eres, while four isolates were classified as D. hongkongensis. Here, we report D. hongkongensis causing sweet cherry branch dieback disease and, further, we confirmed the host association of D. eres with sweet cherries in China. A pathogenicity assay revealed the ability of both D. eres and D. hongkongensis to cause shoot necrosis and stem lesions on Prunus avium cv. 'Brooks' (mean lesion lengths of 1.86 cm and 1.56 cm, respectively). The optimal temperature for the growth of both Diaporthe species was tested. The optimal growth temperature for D. hongkongensis was 30 degree celsius, and the 25-28 degree celsius temperatures were the most favorable for the growth of D. eres strains. This research advances the understanding of fungal trunk diseases in fruit crops, particularly gummosis and branch dieback disease in Chinese cherry orchards, and will aid growers in making decisions about cultural practices and disease management.

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