Delving Into Stem Canker Disease of Potato Caused by Paramyrothecium roridum: A Morphological and Host Range Study in Iran.

IF 2.3 3区生物学 Q3 MICROBIOLOGY

Current Microbiology Pub Date : 2024-11-24 DOI:10.1007/s00284-024-03988-z

Somayeh Farokhian, Samad Jamali, Hadi Khateri, Saeed Abbasi

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引用次数: 0

Abstract

In the summer of 2019, a severe stem canker disease affected potato (Solanum tuberosum) plants in a 10-hectare commercial field in Kermanshah province, Iran. Approximately 10% of the plants exhibited wilting, leaf yellowing and brown stem lesions with black sporodochia. Infected plants produced small tubers with no visible lesions. Ten fungal isolates from diseased plants were identified as Paramyrothecium roridum based on colony culture, microscopic characteristics, and analysis of the internal transcribed spacer (ITS) region and part of the β-tubulin gene. The pathogenicity of P. roridum on seedlings was confirmed by fulfilling Koch's postulates. Host range studies revealed a broad pathogenicity of the P. roridum isolate, successfully infecting various plant species with varying disease severities. Cucumis melo (melon) and Nicotiana rustica (wild tobacco) displayed susceptibility, while Triticum aestivum (wheat) and Avena sativa (oat) from the Poaceae family exhibited resistance. This study identifies P. roridum as a novel cause of potato stem canker disease in Iran.

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深入研究 Paramyrothecium roridum 引起的马铃薯茎枯病：伊朗的形态和寄主范围研究

2019 年夏季，伊朗克尔曼沙阿省一块 10 公顷的商业田地里的马铃薯（Solanum tuberosum）植株受到严重的茎腐病影响。约 10% 的植株出现枯萎、叶片黄化和带有黑色孢子囊的褐色茎部病变。受感染的植株结出的块茎较小，没有明显病变。根据菌落培养、显微特征以及内部转录间隔区（ITS）和部分 β-微管蛋白基因分析，从病株中分离出的 10 株真菌被鉴定为 Paramyrothecium roridum。Roridum 对幼苗的致病性已通过符合科赫推论得到证实。寄主范围研究表明，P. roridum 分离物具有广泛的致病性，可成功感染多种植物，且病害严重程度各不相同。甜瓜（Cucumis melo）和野生烟草（Nicotiana rustica）表现出易感性，而菊科的小麦（Triticum aestivum）和燕麦（Avena sativa）则表现出抗性。这项研究确定 P. roridum 是伊朗马铃薯茎腐病的新病原。

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来源期刊

Current Microbiology 生物-微生物学

CiteScore

4.80

自引率

3.80%

发文量

380

审稿时长

2.5 months

期刊介绍： Current Microbiology is a well-established journal that publishes articles in all aspects of microbial cells and the interactions between the microorganisms, their hosts and the environment. Current Microbiology publishes original research articles, short communications, reviews and letters to the editor, spanning the following areas: physiology, biochemistry, genetics, genomics, biotechnology, ecology, evolution, morphology, taxonomy, diagnostic methods, medical and clinical microbiology and immunology as applied to microorganisms.