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首页> 外文期刊>Plant Disease >Characterization and Pathogenicity of Colletotrichum Species on Philodendron tatei cv. Congo in Gansu Province, China
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Characterization and Pathogenicity of Colletotrichum Species on Philodendron tatei cv. Congo in Gansu Province, China

机译：Philodendron CV中胶凝藻类种类的表征及致病性。 刚果在甘肃省，中国

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摘要

In recent years in China, leaf spot caused by Colletotrichum species has been an emerging disease of Philodendron tatei cv. Congo. From 2016 to 2019, typical symptoms, appearing as circular or ovoid, sunken, and brown lesions with a yellow halo, were commonly observed on P. tatei cv. Congo in and around Lanzhou, Gansu Province, China. Conidiomata were often visible on infected leaf surfaces. Leaf disease incidence was approximately 5 to 20%. A total of 126 single-spored Colletotrichum isolates were obtained from leaf lesions. Multilocus phylogenetic relationships were analyzed based on seven genomic loci (ITS, ACT, GAPDH, HIS3, CAL, CHS-1, and TUB2) and the morphological characters of the isolates determined. These isolates were identified as three Colletotrichum species in this study. A further 93 isolates, accounting for 74% of all Colletotrichum isolates, were described as new species and named as Colletotrichum philodendricola sp. nov. after the host plant genus name, Philodendron; another two isolates were named as C. pseudoboninense sp. nov. based on phylogenetic and morphological relativeness to C. boninense; the other 31 isolates, belonging to the C. orchidearum species complex, were identified as a known species C. orchidearum. Both novel species C. philodendricola and C. pseudoboninense belong to the C. boninense species complex. Pathogenicity tests by both spray and point inoculations confirmed that all three species could infect leaves of P. tatei cv. Congo. For spray inoculation, the mean infection rate of leaves on the three species was only 4.7% (0 to 12%), and the size on lesions was mostly 1 to 2 mm in length. For point inoculation, 30 days after nonwounding inoculation, the infection rate on leaves was 0 to 35%; in wounding inoculation, the infection rate of leaves was 35 to 65%; wounding in healthy leaves greatly enhanced the pathogenicity of these three species to P. tatei cv. Congo; however, the sizes of lesions among the three species were not significantly different. To our knowledge, this is the first report of Colletotrichum species associated with anthracnose diseases on P. tatei cv. Congo. Results obtained in this study will assist the disease prevention and appropriate management strategies.
机译：近年来在中国，由Collettrichum物种引起的叶斑成为Philodendron Tatei CV的新兴疾病。刚果。从2016到2019年，典型的症状，随着圆形或卵形，沉没，棕色病变，在P.Tatei CV上常见。刚果在兰州，甘肃省，中国。在感染的叶子表面上经常可见分析。叶疾病发病率约为5％至20％。从叶片病变中获得总共126个单刺的胶合体分离物。基于七种基因组基因座（其ACT，GAPDH，HIS3，CAL，CHS-1和TUB2）和测定的分离物的形态特征进行分析多层菌属系统发育关系。这些分离物被鉴定为这项研究中的三种胶合作子。另外93个分离物，占所有Colletotrichum分离株的74％，被描述为新物种，并命名为Collettrichum Philodendricola SP。 11月。在宿主植物属之后，Philodendron;另外两个分离株被命名为C.Pseudoboninense SP。 11月。基于P.Boninense的系统发育和形态学性能;其他31个分离物属于C. orchidearum物种复合物，被鉴定为已知的物种C. orchidearum。既有新颖的C. Philodendricola和C.Pseudoboninense都属于C. Boninense物种复合物。喷雾和点接种的致病性试验证实，所有三种物种都可能感染P.Tatei CV的叶子。刚果。对于喷雾接种，三种物种的叶片的平均感染率仅为4.7％（0至12％），病变的尺寸大部分长度为1至2mm。对于点接种，非染色接种后30天，叶片的感染率为0〜35％;在接种的伤口中，叶片的感染率为35％至65％;健康叶片的伤人大大提高了这三种物种的致病性至p.Tatei CV。刚果;然而，三种物种之间的病变尺寸没有显着差异。据我们所知，这是与毒素CV上与炭疽病疾病有关的胶凝物种的第一份报告。刚果。本研究中获得的结果将协助疾病预防和适当的管理策略。

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  • 来源
    《Plant Disease》 |2020年第10期|共14页
  • 作者

    Xue Longhai; Zhang Yongwen; Duan Tingyu; Li Mengyuan; White James F.; Liu Yong; Li Chunjie;

  • 作者单位

    Lanzhou Univ Minist Educ Gansu Tech Innovat Ctr Western China Minist Agr &

    Rural Affairs Engn Res Ctr Grassland State Key Lab Grassland Agroecosyst Key Lab Grass Lanzhou 730020 Peoples R China;

    Lanzhou Univ Minist Educ Gansu Tech Innovat Ctr Western China Minist Agr &

    Rural Affairs Engn Res Ctr Grassland State Key Lab Grassland Agroecosyst Key Lab Grass Lanzhou 730020 Peoples R China;

    Lanzhou Univ Minist Educ Gansu Tech Innovat Ctr Western China Minist Agr &

    Rural Affairs Engn Res Ctr Grassland State Key Lab Grassland Agroecosyst Key Lab Grass Lanzhou 730020 Peoples R China;

    Lanzhou Univ Coll Management Lanzhou 730020 Peoples R China;

    Rutgers State Univ Dept Plant Biol New Brunswick NJ 08901 USA;

    Sichuan Acad Agr Sci Inst Plant Protect Chengdu 610066 Peoples R China;

    Lanzhou Univ Minist Educ Gansu Tech Innovat Ctr Western China Minist Agr &

    Rural Affairs Engn Res Ctr Grassland State Key Lab Grassland Agroecosyst Key Lab Grass Lanzhou 730020 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物保护;
  • 关键词

    Philodendron tatei cv. Congo; new species of Colletotrichum; brown spot; identification;

    机译：Philodendron Tatei CV。 刚果;新物种的Collettrichum;棕色点;鉴定;

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