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首页> 外文期刊>Plant Pathology >Paraphoma root rot of alfalfa (Medicago sativa) in Inner Mongolia, China
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Paraphoma root rot of alfalfa (Medicago sativa) in Inner Mongolia, China

机译：苜蓿（Medicago Sativa）的Paraphoma根腐烂在中国内蒙古

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摘要

Root rot symptoms were observed in fields of alfalfa in Chifeng city, Inner Mongolia, China in 2016. Disease incidences of seven alfalfa varieties planted in 2014 ranged from 56% to 95%, while incidence of Gongnong No. 1 planted in 2016 was 8%, 31% and 76% in 2016, 2017 and 2018, respectively. Paraphoma isolates were consistently recovered from black necrotic root tissues of diseased plants with a frequency of 77.1%. Based on morphological characters and phylogenetic analysis of rDNA internal transcribed spacer (ITS), elongation factor 1-alpha (EF1-alpha) and beta-tubulin (TUB), this fungus was identified as Paraphoma radicina. Glasshouse pathogenicity experiments showed that P. radicina significantly reduced above- and below-ground biomass of alfalfa plants 2 months after inoculation. Paraphoma radicina infected 70% of the plants inoculated with a root dip in conidia, and these symptoms were consistent with the symptoms in the field. Paraphoma radicina was successfully reisolated from disease roots of the inoculated alfalfa plants. This is the first report of P. radicina as the causal agent of alfalfa root rot in China.
机译：2016年中国内蒙古赤峰市紫花苜蓿领域观察到根腐症状。2014年七苜蓿品种的疾病发生率为56％至95％，而2016年巩金1号种植的发病率为8％ 2016年，2016年和2018年的31％和76％分别。 Pupaphoma分离物始终从患病植物的黑坏死根组织中回收，频率为77.1％。基于RDNA内转录间隔物（其）的形态学特性和系统发育分析，伸长因子1-α（EF1-α）和β-微管蛋白（浴缸），该真菌被鉴定为Paphoma Radicina。玻璃院致病性实验表明，接种后2个月，P. Radicina显着降低了苜蓿植物的苜蓿植物的后和地下生物量。 Paraphoma Radicina感染了70％的植物，在分类中浸入了根浸，这些症状与现场的症状一致。从接种的苜蓿植物的疾病根部成功地重新坐出了Paphoma Radicina。这是P. Radicina作为中国苜蓿根腐的因果剂的第一个报告。

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  • 来源
    《Plant Pathology》 |2020年第2期|共9页
  • 作者

    Cao S.; Liang Q. W.; Nzabanita C.; Li Y. Z.;

  • 作者单位

    Lanzhou Univ State Key Lab Grassland Agroecosyst Coll Pastoral Key Lab Grassland Livestock Ind Innovat Minist Ed Minist Agr &

    Rural Affairs Engn Res Ctr Grassland Lanzhou 730020 Gansu Peoples R China;

    Chifeng Acad Agr &

    Anim Sci Chifeng 024001 Peoples R China;

    Lanzhou Univ State Key Lab Grassland Agroecosyst Coll Pastoral Key Lab Grassland Livestock Ind Innovat Minist Ed Minist Agr &

    Rural Affairs Engn Res Ctr Grassland Lanzhou 730020 Gansu Peoples R China;

    Lanzhou Univ State Key Lab Grassland Agroecosyst Coll Pastoral Key Lab Grassland Livestock Ind Innovat Minist Ed Minist Agr &

    Rural Affairs Engn Res Ctr Grassland Lanzhou 730020 Gansu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物病理学;
  • 关键词

    morphological identification; Paraphoma radicina; pathogenicity; phylogenetic analysis; setose pycnidia;

    机译：形态学鉴定;Puphoma Gradicina;致病性;系统发育分析;凝固性Pycnidia;

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