First Report of Leaf Mould of Spinach Caused by Curvularia hominis in China

IF 1.2 4区农林科学 Q3 PLANT SCIENCES

Journal of Phytopathology Pub Date : 2026-07-15 DOI:10.1111/jph.70362

Yanqing Li, Xiugao Zhu, Cuicui Wang, Lin Cheng, Haoqin Pan

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引用次数: 0

Abstract

Spinacia oleracea L. is a major vegetable crop in China, accounting for 70% of the global planting area. In October 2024, leaf mould disease with a 65% incidence was observed on spinach in greenhouses in Niutou Town, Weifang, Shandong Province. The lower leaves turn yellow first then developed into white spots; they were circular to nearly circular, ranging from 0.3 to 20 mm in size. Through experiments, fourteen fungal strains were isolated. Their colony and conidium morphology matched the genus Curvularia. Multilocus sequence analysis (tef1α, ITS, LSU) showed 99.26%–99.82% identity to Curvularia hominis, and phylogenetic trees clustered the isolates with C. hominis. Pathogenicity tests confirmed that the representative strain Bocai7 induced typical symptoms, and the pathogen was reisolated successfully, fulfilling Koch's postulates. This is the first report of C. hominis causing spinach leaf mould, which threatens spinach yield and quality by impairing photosynthesis and nutrient transport.

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中国人曲霉病引起的菠菜叶霉病首次报道

菠菜（Spinacia oleeracea L.）是中国主要的蔬菜作物，占全球种植面积的70%。2024年10月，山东省潍坊市牛头镇大棚菠菜发生叶霉病，发病率65%。下部的叶子先变黄，然后变成白色的斑点；它们呈圆形或近圆形，大小从0.3毫米到20毫米不等。通过实验，分离到14株真菌。其菌落和分生孢子形态与曲霉属一致。多位点序列分析（tef1α， ITS， LSU）表明，分离株与人曲菌同源性为99.26% ~ 99.82%，系统发育树与人曲菌聚类。致病性试验证实，代表性菌株Bocai7诱导了典型症状，病原体被成功重新分离，符合Koch的假设。这是首次报道的引起菠菜叶霉病的人源梭菌，它通过破坏菠菜的光合作用和营养物质的运输来威胁菠菜的产量和质量。

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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.