The co-occurrence of two powdery mildew species on Cannabis sativa in the Czech Republic

IF 1.1 4区农林科学 Q3 PLANT SCIENCES Journal of Phytopathology Pub Date : 2024-06-25 DOI:10.1111/jph.13348

Barbora Mieslerová, Miloslav Kitner, Josef Baltazar Šenkyřík, Tereza Křivánková, Michaela Sedlářová, Uwe Braun, Aleš Lebeda

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Abstract

In late summer 2022 and 2023, powdery mildew symptoms were found on female plants of hemp (Cannabis sativa) growing in a private garden in Hradec nad Moravicí (Silesia, Czech Republic). On the upper sides of the leaves, white powdery colonies were observed which coalesced and finally covered the whole leaf surface. The stems and flowers were not affected. Microscopic examination revealed the formation of asexual (anamorphic) states characterized by conidiophores forming catenescent conidia (Euoidium type), but with two types of conidia, viz., ellipsoid to ovoid or doliiform conidia with fibrosin bodies (resembling conidia of Podosphaera spp.), and ellipsoid to doliiform conidia without fibrosin bodies (resembling conidia of Golovinomyces spp.). Molecular genetic analyses confirmed co-infections in the studied hemp samples by two powdery mildew species, viz., Podosphaera macularis and Golovinomyces ambrosiae, which represent first records from the Czech Republic, as well as Europe and in the world. The authors discuss the latest information and ideas regarding this pathosystem.

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捷克共和国大麻上两种白粉病菌的共存情况

2022 年夏末和 2023 年夏末，在 Hradec nad Moravicí（捷克共和国西里西亚）一个私人花园中种植的大麻（Cannabis sativa）雌株上发现了白粉病症状。在叶片上部两侧观察到白色粉状菌落，这些菌落逐渐聚合，最后覆盖了整个叶面。茎和花未受影响。显微镜检查发现，该病菌形成了无性（无形态）状态，其特征是分生孢子梗形成猫眼状分生孢子（Euoidium 型），但有两种类型的分生孢子，即椭圆形至卵形或多角形的分生孢子，带有纤维素体（类似 Podosphaera 属的分生孢子），以及椭圆形至多角形的分生孢子，不带有纤维素体（类似 Golovinomyces 属的分生孢子）。分子遗传分析证实，在所研究的大麻样本中，有两种白粉病菌同时感染，即黄斑荚膜白粉病菌（Podosphaera macularis）和伏洛温霉菌（Golovinomyces ambrosiae），这是捷克共和国、欧洲和世界上的首次记录。作者讨论了有关该病原系统的最新信息和观点。

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来源期刊

Journal of Phytopathology 生物-植物科学

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays. Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes. Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.