Diaporthe xiuwenensis sp. nov, a new fungal species causing postharvest kiwifruit rot in Guizhou

IF 1.1 4区农林科学 Q3 PLANT SCIENCES

Journal of Phytopathology Pub Date : 2024-04-20 DOI:10.1111/jph.13306

Chunguang Ren, Yu Liu, Wenwen Su, Zhengcheng Han, Di Wu, Weijie Li

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引用次数: 0

Abstract

Diaporthe spp. (including their asexual Phomopsis states) are important plant pathogens found widely in different host plants, such as pathogens, endophytes or saprobes. In this study, a new species of Diaporthe causing fruit rot in kiwifruit, Diaporthe xiuwenensis sp. nov was isolated from kiwifruit with apparent soft rot symptoms during storage in Guizhou Province, China. Identification was made using morphology and comparison of DNA sequence data of the nuclear ribosomal ITS (internal transcribed spacer) + tef1 (translation elongation factor-1α) + tub2 (β-tubulin) + cal (calmodulin) + his (histone H3) gene regions. This study further described a new Diaporthe species and discussed its morphology and phylogenetic relationships with other Diaporthe species. Koch's postulates tests identified the causative agents of kiwifruit soft rot. The results of pathogenicity test showed that Diaporthe xiuwenensis sp. nov was pathogenic to kiwifruit, and the Koch's postulates were completed.

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贵州猕猴桃采后腐烂病的新菌种 Diaporthe xiuwenensis sp.

Diaporthe spp.（包括其无性的 Phomopsis 状态）是重要的植物病原菌，广泛存在于不同的寄主植物中，如病原菌、内生菌或病原菌。本研究从中国贵州省贮藏期间出现明显软腐症状的猕猴桃中分离出了一种导致猕猴桃果实腐烂的 Diaporthe 新种 Diaporthe xiuwenensis sp.通过形态学和核核糖体 ITS（内部转录间隔区）+tef1（翻译伸长因子-1α）+tub2（β-微管蛋白）+cal（钙调蛋白）+his（组蛋白 H3）基因区 DNA 序列数据的比较进行了鉴定。该研究进一步描述了一种新的 Diaporthe 物种，并讨论了其形态以及与其他 Diaporthe 物种的系统发育关系。科赫假设检验确定了猕猴桃软腐病的致病菌。致病性试验结果表明，Diaporthe xiuwenensis sp.

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来源期刊

Journal of Phytopathology 生物-植物科学

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays. Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes. Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.