Development of a real-time loop-mediated isothermal amplification method with toothpick sampling for non-destructive detection of Ustilago esculenta in Zizania latifolia

IF 1 4区 农林科学 Q3 PLANT SCIENCES
Ryunosuke Yamada, Nobumitsu Sasaki, Ken Komatsu, Kouji Mashimo, Takashi Motobayashi
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Abstract

Infection of Zizania latifolia by the basidiomycete Ustilago esculenta enlarges the stem tissue to produce edible galls called "makomotake" in Japan. The development of stem galls in Z. latifolia may be influenced by the colonization level of U. esculenta at the seedling stage. To evaluate this possibility, it is necessary to establish a method to investigate the relationship between fungal levels in seedlings and the production of makomotake from the same seedlings in a non-destructive manner. To achieve this goal, in this study, we attempted to develop a real-time loop-mediated isothermal amplification (LAMP) method with toothpick sampling for U. esculenta detection. An U. esculenta gene-specific LAMP primer set designed for real-time LAMP showed sufficient detection sensitivity for fungal genomic DNA, which is only about 10 times lower than that of quantitative PCR. Real-time LAMP reactions following toothpick sampling detected U. esculenta efficiently in the culm part of Z. latifolia seedlings that eventually produced makomotake, but did not detect in those that failed to develop stem galls. Our data show that the combination of real-time LAMP and toothpick sampling is a simple and useful method for estimating U. esculenta levels in Z. latifolia seedlings and for studying the subsequent development of stem galls in the same individuals.

Abstract Image

开发一种实时环介导等温扩增法和牙签取样法,用于无损检测菰中的 Ustilago esculenta
基枝霉菌 Ustilago esculenta 感染阔叶天竺葵后会使茎组织增大,产生可食用的虫瘿,在日本被称为 "makomotake"。宽叶菰茎瘿的发育可能受幼苗期 U. esculenta 定殖水平的影响。为了评估这种可能性,有必要建立一种方法,以非破坏性的方式研究幼苗中的真菌水平与同一幼苗的菰产量之间的关系。为了实现这一目标,在本研究中,我们尝试开发一种实时环介导等温扩增(LAMP)方法,用牙签取样检测 U. esculenta。为实时 LAMP 设计的 U. esculenta 基因特异性 LAMP 引物组对真菌基因组 DNA 有足够的检测灵敏度,仅比定量 PCR 低约 10 倍。用牙签取样后进行的实时 LAMP 反应能在最终产生真菌瘿的阔叶浙贝母幼苗的茎秆部分有效地检测到 U. esculenta,但在未产生茎秆瘿的幼苗中却检测不到。我们的数据表明,将实时 LAMP 和牙签取样相结合是一种简单而有用的方法,可用于估计阔叶茨实幼苗中的 U. esculenta 含量,并研究同一个体随后茎瘿的发育情况。
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来源期刊
CiteScore
2.40
自引率
8.30%
发文量
60
审稿时长
6 months
期刊介绍: The Journal of General Plant Pathology welcomes all manuscripts dealing with plant diseases or their control, including pathogen characterization, identification of pathogens, disease physiology and biochemistry, molecular biology, morphology and ultrastructure, genetics, disease transmission, ecology and epidemiology, chemical and biological control, disease assessment, and other topics relevant to plant pathological disorders.
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