在中国,Diaporthe物种 (Sordariomycetes,Diaporthales) 是导致核桃病和核桃衰退的原因
Lili Zhao1, Lin Zhang1, Yi Ding1,2
1School of Ecology and Nature Conservation, Beijing Forestry University, Beijing, China Beijing Forestry University Beijing China.
MycoKeys
|September 22, 2025
概括
七种Diaporthe真菌物种,包括一种新的物种D. yunnana,被确定为致病原体,导致中国的核桃茎病变和死亡. 病原性各不相同,其中D. eres和D. rostrata是最有毒的.
科学领域:
- 植物病理学 植物病理学
- 菌类学 菌类学是指菌类学.
- 农业科学 农业科学
背景情况:
- 在中国种植的英语核桃 (Juglans regia L.) 受到茎病和枯的威胁.
- 确定病因对疾病管理和保护经济价值至关重要.
研究的目的:
- 进行全国性调查,以确定Diaporthe与核桃茎病和中国的死亡相关的物种.
- 确定Juglans regia.上发现的Diaporthe物种的致病性.
主要方法:
- 从中国七个省份收集了276个症状样本.
- 隔离并确定了292个Diaporthe spp. 使用形态和多位点的遗传学分析 (ITS, cal, his3, tef1-α, tub2).
- 使用科赫的假设验证了病原性.
主要成果:
- 确定了七种Diaporthe物种,包括一个新物种Diaporthe yunnana.
- 该物种的分布在地理上有所不同,在亚热带西南中国最为丰富.
- 所有七种物种都引起了病和死亡,在毒性方面存在显著差异 (D. eres和D. rostrata是最有毒的).
- 在Juglans regia上首次报告了D. citrichinensis,D. psoraleae-pinnatae和D. sackstonii. 在Juglans regia上首次报告.
结论:
- 该物种是中国英语核桃的重要病原体.
- 地理分布和病原性在各个Diaport感染Juglans regia.的物种之间有所不同.
- 这项研究扩大了已知的多样性和宿主范围Diaport,影响核桃的病原体.
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