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A broad diversity survey of Rhizoctonia species from the Brazilian Amazon reveals the prevalence of R. solani AG‐1 IA on signal grass and the new record of AG‐1 IF on cowpea and soybeans
Plant Pathology ( IF 2.3 ) Pub Date : 2020-01-21 , DOI: 10.1111/ppa.13142 Edisson Chavarro‐Mesa 1, 2 , Paulo Ceresini 2 , Danilo Pereira 3 , Samara Vicentini 2 , Tatiane Silva 2 , Lina Ramos‐Molina 4 , Matheus Negrisoli 5 , Daniel Schurt 6 , José R. Vieira Júnior 7
Plant Pathology ( IF 2.3 ) Pub Date : 2020-01-21 , DOI: 10.1111/ppa.13142 Edisson Chavarro‐Mesa 1, 2 , Paulo Ceresini 2 , Danilo Pereira 3 , Samara Vicentini 2 , Tatiane Silva 2 , Lina Ramos‐Molina 4 , Matheus Negrisoli 5 , Daniel Schurt 6 , José R. Vieira Júnior 7
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Leaf blight, sheath blight, and web blight are major diseases caused by Rhizoctonia species on both Fabaceae and Poaceae plant hosts in the Brazilian Amazon agroecosystem. To determine the diversity of Rhizoctonia species associated with foliar diseases on fabaceous (cowpea and soybean) and poaceous (rice and signal grass [Urochloa brizantha]) hosts, a broad survey was conducted in Pará, Rondônia, Roraima, and Mato Grosso, in the Amazon, from 2012 to 2013. We extended our survey to Cerrado areas of Mato Grosso, and the lowlands of Paraíba Valley, in São Paulo, where these Rhizoctonia foliar diseases have not been reported so far. Our findings revealed that these diseases are caused by a diversity of Rhizoctonia solani AG‐1 complex. We detected that R. solani AG‐1 IA (sexual phase Thanatephorus cucumeris) was the predominant pathogen associated with signal grass leaf blight and collar rot diseases in the Amazon, especially in Rondônia and northern Mato Grosso. In addition, a subgroup of R. solani (AG‐1 IF), not previously reported in Brazil, was associated with leaf blight on cowpea and soybean, in Roraima. Another subgroup (AG‐1 ID) was also detected in Roraima. In Mato Grosso Cerrados we did not find any of the major Rhizoctonia foliar pathogens. Instead, R. oryzae (Waitea circinata) was the predominant species associated with a collar rot on U. brizantha. In the lowlands of São Paulo, R. oryzae‐sativae (Ceratobasidium oryzae‐sativae) was the predominant pathogen detected causing the rice sheath spot disease.
中文翻译：
来自巴西亚马逊的对根瘤菌物种的广泛多样性调查显示，茄子R. solani AG-1 IA在信号草上盛行，cow豆和大豆上AG-1 IF的新记录
叶枯病，纹枯病和网络病是引起重大疾病纹枯病在巴西亚马逊河流域农业生态系统都豆科和禾本科植物宿主物种。要确定的多样性丝核菌与叶面病害上豆苗（豇豆和大豆）和poaceous相关物种（水稻和信号草[尾稃草属brizantha ]）的主机，一个广泛的调查是在帕拉，朗多尼亚，罗赖马，和马托格罗索进行的，在亚马逊，从2012年到2013年。我们将调查范围扩大到了马托格罗索州的塞拉多地区和圣保罗的帕拉伊巴河谷低地，到目前为止，尚未报告这些根瘤菌叶病。我们的研究结果表明，这些疾病是由茄状枯萎病引起的AG-1复合体。我们发现在亚马逊河地区，特别是在朗多尼亚和北部的马托格罗索州，茄属R. solani AG-1 IA（性相位Thanatephorus cucumeris）是与信号草叶枯萎病和领腐病相关的主要病原体。此外，Roraima地区的一个尚未在巴西报道的茄子R. solani（AG-1 IF）亚型与cow豆和大豆的叶枯病有关。在Roraima中还检测到另一个亚组（AG-1 ID）。在马托格罗索Cerrados我们没有发现任何重大纹枯病叶片病原体。取而代之的是，米根霉（Waitea circinata）与上轴环腐相关联的主要种类U. brizantha。在圣保罗的低地，稻瘟病菌（Ceratobasidium oryzae-sativae）是导致稻米鞘斑病的主要病原体。
更新日期：2020-01-21
中文翻译：
来自巴西亚马逊的对根瘤菌物种的广泛多样性调查显示，茄子R. solani AG-1 IA在信号草上盛行，cow豆和大豆上AG-1 IF的新记录
叶枯病，纹枯病和网络病是引起重大疾病纹枯病在巴西亚马逊河流域农业生态系统都豆科和禾本科植物宿主物种。要确定的多样性丝核菌与叶面病害上豆苗（豇豆和大豆）和poaceous相关物种（水稻和信号草[尾稃草属brizantha ]）的主机，一个广泛的调查是在帕拉，朗多尼亚，罗赖马，和马托格罗索进行的，在亚马逊，从2012年到2013年。我们将调查范围扩大到了马托格罗索州的塞拉多地区和圣保罗的帕拉伊巴河谷低地，到目前为止，尚未报告这些根瘤菌叶病。我们的研究结果表明，这些疾病是由茄状枯萎病引起的AG-1复合体。我们发现在亚马逊河地区，特别是在朗多尼亚和北部的马托格罗索州，茄属R. solani AG-1 IA（性相位Thanatephorus cucumeris）是与信号草叶枯萎病和领腐病相关的主要病原体。此外，Roraima地区的一个尚未在巴西报道的茄子R. solani（AG-1 IF）亚型与cow豆和大豆的叶枯病有关。在Roraima中还检测到另一个亚组（AG-1 ID）。在马托格罗索Cerrados我们没有发现任何重大纹枯病叶片病原体。取而代之的是，米根霉（Waitea circinata）与上轴环腐相关联的主要种类U. brizantha。在圣保罗的低地，稻瘟病菌（Ceratobasidium oryzae-sativae）是导致稻米鞘斑病的主要病原体。
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