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A Novel Disease of Big-Leaf Mahogany Caused by Two Fusarium Species in Mexico

机译：墨西哥两种镰刀种类引起的大叶桃花心木疾病

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摘要

Big-leaf mahogany (Swietenia macrophylla) is valued for its high-quality wood and use in urban landscapes in Mexico. During surveys of mango-producing areas in the central western region of Mexico, symptoms of malformation, the most important diseaseof mango in the area, were observed on big-leaf mahogany trees. The objectives of this research were to describe this new disease and determine its cause. Symptoms on big-leaf mahogany at four sites in Michoacan, Mexico resembled those of the vegetativephase of mango malformation, including compact, bunched growth of apical and lateral buds, with greatly shortened inter-nodes and small leaves that curved back toward the supporting stem. Of 163 isolates that were recovered from symptomatic tissues, mostwereidentified as Fusarium pseudocircinatum (n = 121) and F. mexicanum (n = 39) using molecular systematic data; two isolates represented unnamed phylospecies within the F. incarnatum-equiseti species complex (FIESC 20-d and FIESC 37-a) and another was in the F. solani species complex (FSSC 25-m). However, only F. mexicanum and F. pseudocircinatum induced malformation symptoms on 14-day-old seedlings of big-leaf mahogany. The results indicate that F. mexicanum and F. pseudocircinatum, previously reported inMexico as causal agents of mango malformation disease, also affect big-leaf mahogany. This is the first report of this new disease and the first time that F. mexicanum was shown to affect a host other than mango.
机译：大叶桃花心木（Squietenia Macrophylla）是其高品质的木材，并在墨西哥的城市景观中使用。在墨西哥中西部地区的芒果地区调查中，在大叶桃花心木树上观察到该地区芒果最重要的疾病畸形症状。本研究的目标是描述这种新疾病并确定其原因。墨西哥四个地点的大叶片桃花心木的症状类似于芒果畸形的植物效果的植物效果，包括紧凑，横向芽的束缚生长，并且具有大大缩短的节点和弯曲朝向支撑杆的小叶。从症状组织中回收的163个分离物，用分子系统数据从症状组织中回收的症状组织（n = 121）和F.Mexicanum（n = 39）中的镰刀菌;两种分离株在F. Incarnatum-Equiseti物种复合物（FiESC 20-D和Fiesc 37-A）中表示未命名的文学化，另一个是在F.Solani物种复合物（FSSC 25-M）中。然而，只有F. Mexicanum和F.pseudocircinatum诱导的大叶桃花心木幼苗畸形症状。结果表明，F. Mexicanum和F.Pseudocircinatum，以前报道的Inmexico作为芒果畸形疾病的因果剂，也影响大叶桃花心木。这是这种新疾病的第一个报告，第一次墨西哥患者被证明会影响芒果以外的宿主。

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  • 来源
    《Plant Disease》 |2018年第10期|共8页
  • 作者

    R. Santillan-Mendoza; S. P. Fernandez-Pavia; K. ODonnell; R. C. Ploetz; R. Ortega-Arreola; G. Vazquez-Marrufo; J. Benitez-Malvido; J. C. Montero-Castro; A. Soto-Plancarte; G. Rodriguez-Alvarado;

  • 作者单位

    Laboratorio de Patologfa Vegetal IIAF Universidad Michoacana de San Nicolas de Hidalgo (UMSNH) Km. 9.5 Carr. Morelia-Zinapecuaro Michoacan 58880 Mexico;

    Mycotoxin Prevention and Applied Microbiology Research Unit United States Department of Agriculture-Agricultural Research Service National Center for Agricultural Utilization Research Peoria IL 61604;

    Department of Plant Pathology Tropical Research and Education Center University of Florida Homestead 33031-3314;

    Campo Experimental Tecoman Instituto Nacional de Investigaciones Forestales Agricolas y Pecuarias Tecoman Colima 28100 Mexico;

    Campo Experimental Tecoman Instituto Nacional de Investigaciones Forestales Agricolas y Pecuarias Tecoman Colima 28100 Mexico;

    Centra Multidisciplinario de Estudios en Biotecnologia FMVZ UMSNH;

    Instituto de Investigaciones en Ecosistemas y Sustentabilidad Universidad Nacional Autonoma de Mexico Antigua Carretera a Patzcuaro No. 8701 Ex Hacienda de San Jose de la Huerta Morelia Michoacan 58190 Mexico;

    Facultad de Biologfa UMSNH Cd. Universitaria Morelia Michoacan 58060 Mexico;

    Laboratorio de Patologfa Vegetal IIAF UMSNH;

    Laboratorio de Patologfa Vegetal IIAF UMSNH;

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