云南梅果腐病由avenacium和graminearum引起的首次报道

IF 2.5 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2025-09-12 DOI:10.1016/j.cropro.2025.107402

Fenghuan Yang , Yonghui Cheng , Chao Yu , Yijuan Yang , Zhenghui Huang , Huamin Chen

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引用次数: 0

摘要

李子（Prunus salicina Lindl.）因其营养价值而在世界范围内种植。2024年7月，中国云南省绥江县商业果园爆发了一场导致李子果实腐烂的病害，导致产量损失30% - 60%。从4个果园共收集到15株有腐病症状的李子，分离到13株真菌。根据菌落形态将13株菌株分为2个类群。第1组有10株分离菌，菌丝呈蓬松白色，带有金色色素环；第2组有3株分离菌，菌丝呈白色，带有粉红色色素沉着。致病性试验证实，13株分离株在接种后7 ~ 10 d产生果腐症状。从患病的李子中重新分离出与接种菌株具有相同形态特征的真菌分离株，实现了科赫的假设。对1组4株（YZS3.1、YZS4.2、YZS5.3和YZS7.1）和2组1株（YN-3）进行分子鉴定，包括对其内部转录间隔区、翻译延伸因子（TEF1）和RNA聚合酶II亚基（RPB2）进行测序。TEF1和RPB2的系统发育分析表明，第1群分离菌株为镰刀菌，第2群分离菌株为禾谷镰刀菌。上述结果表明，avenaceum和graminearum是云南李子果实腐烂的致病菌。

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First report of fruit rot caused by Fusarium avenaceum and Fusarium graminearum on Plum in Yunnan, China

Plum (Prunus salicina Lindl.) is cultivated worldwide for its nutritional value. An outbreak of a disease that caused fruit rot in plums in July 2024 resulted in a 30 %–60 % yield loss in the commercial orchard in Suijiang County, Yunnan Province, China. A total of 15 plums with rot symptoms were collected from 4 orchards, and 13 fungal isolates were obtained from these diseased plums. The 13 isolates were classified into 2 groups based on colony morphology. Group 1 comprised 10 isolates exhibiting fluffy white aerial hyphae with golden pigment rings, whereas Group 2 comprised 3 isolates displaying white mycelium with pink pigmentation. The pathogenicity assays confirmed that the 13 isolates induced fruit rot symptoms at 7–10 days post inoculation. The fungal isolates exhibiting the same morphological features as the inoculated strains were reisolated from diseased plums, fulfilling Koch's postulates. Four strains (YZS3.1, YZS4.2, YZS5.3, and YZS7.1) in Group 1 and one strain in Group 2 (YN-3) were identified by molecular characterization, including sequencing of the internal transcribed spacer region, translation elongation factor (TEF1), and RNA polymerase II subunit (RPB2). The phylogenetic analysis of TEF1 and RPB2 identified Group 1 isolates as Fusarium avenaceum and Group 2 isolates as F. graminearum. These findings indicated that F. avenaceum and F. graminearum are the causal agents of fruit rot in plums in Yunnan Province, China.

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来源期刊

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.