Curvularia soli causes a new leaf spot disease on Pereskia aculeata

IF 2.5 2区农林科学 Q1 AGRONOMY

Crop Protection Pub Date : 2024-09-26 DOI:10.1016/j.cropro.2024.106965

Simone Albino Paes, Bianca Moreira Barbosa, Fábio Alex Custódio, Olinto Liparini Pereira

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引用次数: 0

Abstract

Pereskia aculeata (Barbados gooseberry) is a vegetable member of the Cactaceae family. Pereskia aculeata leaves are highly valued for culinary use in some Brazilian regions, mainly in Minas Gerais. In March 2023, severe leaf spot disease affecting P. aculeata plants was observed in Viçosa, Minas Gerais, Brazil. Notably, we found that Curvularia sp. was associated with disease symptoms. However, the fungus Curvularia has not been reported to cause any diseases in P. aculeata. Given the absence of any previous records documenting this fungus as a pathogen for this host, this study aimed to identify Curvularia species associated with leaf spots on P. aculeata and elucidate the etiology of the disease. The fungus was identified as Curvularia soli based on its morphological characteristics and molecular features using glyceraldeyde-3-phosphate dehydrogenase (GAPDH) and translation elongation factor 1-α (TEF1-α) for phylogenetic analyses. Healthy P. aculeata plants were inoculated with a representative isolate of C. soli and the same symptoms as observed in the field were reproduced. All steps were performed to fulfill Koch's postulates and confirm the etiology of the disease.

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Curvularia soli 在 Pereskia aculeata 上引起一种新的叶斑病

Pereskia aculeata（巴巴多斯醋栗）是仙人掌科植物。在巴西的一些地区，主要是米纳斯吉拉斯州，Pereskia aculeata 的叶子具有很高的烹饪价值。2023 年 3 月，在巴西米纳斯吉拉斯州的维索萨发现了严重的叶斑病，影响到 P. aculeata 植物。值得注意的是，我们发现 Curvularia sp. 与疾病症状有关。但是，还没有报道过 Curvularia 真菌会导致 P. aculeata 发生任何病害。鉴于以前没有任何记录表明这种真菌是这种寄主的病原体，本研究旨在确定与 P. aculeata 叶斑病相关的 Curvularia 物种，并阐明这种疾病的病因。根据真菌的形态特征和分子特征，利用甘油三酯脱氢酶（GAPDH）和翻译伸长因子 1-α （TEF1-α）进行系统发育分析，确定该真菌为 Curvularia soli。用具有代表性的 C. soli 分离物接种健康的 P. aculeata 植物，再现田间观察到的相同症状。所有步骤均符合科赫假说，并确认了病原学。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Crop Protection 农林科学-农艺学

CiteScore

6.10

自引率

3.60%

发文量

200

审稿时长

29 days

期刊介绍： The Editors of Crop Protection especially welcome papers describing an interdisciplinary approach showing how different control strategies can be integrated into practical pest management programs, covering high and low input agricultural systems worldwide. Crop Protection particularly emphasizes the practical aspects of control in the field and for protected crops, and includes work which may lead in the near future to more effective control. The journal does not duplicate the many existing excellent biological science journals, which deal mainly with the more fundamental aspects of plant pathology, applied zoology and weed science. Crop Protection covers all practical aspects of pest, disease and weed control, including the following topics: -Abiotic damage- Agronomic control methods- Assessment of pest and disease damage- Molecular methods for the detection and assessment of pests and diseases- Biological control- Biorational pesticides- Control of animal pests of world crops- Control of diseases of crop plants caused by microorganisms- Control of weeds and integrated management- Economic considerations- Effects of plant growth regulators- Environmental benefits of reduced pesticide use- Environmental effects of pesticides- Epidemiology of pests and diseases in relation to control- GM Crops, and genetic engineering applications- Importance and control of postharvest crop losses- Integrated control- Interrelationships and compatibility among different control strategies- Invasive species as they relate to implications for crop protection- Pesticide application methods- Pest management- Phytobiomes for pest and disease control- Resistance management- Sampling and monitoring schemes for diseases, nematodes, pests and weeds.