New Report of Curvularia pseudobrachyspora Causing Brown Spot on Costa Rican Pitahaya Fruit (Hylocereus costaricensis) in Thailand

IF 0.6 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Chiang Mai Journal of Science Pub Date : 2023-01-31 DOI:10.12982/cmjs.2023.003

Fakih Latehnuering, C. Pornsuriya, P. Wonglom, O. Ruangwong, A. Sunpapao

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引用次数: 1

Abstract

In J une 2021, brown spots was observed on Costa Rican pitahaya fruits (Hylocereus costaricensis) in a dragon fruit cultivation in Phatthalung province, southern Thailand. Infected dragon fruits showed small, circular, brown spots that expanded later to irregular shapes and the center of the symptomatic spot becoming dark brown with age. The fungus was isolated and cultured on potato dextrose agar (PDA) for morphological observation. Based on the macroscopic and microscopic features and phylogenetic tree of combined glyceraldehyde-3-phosphate dehydrogenase (gpd), internal transcribed spacer (ITS), and large subunit (LSU) sequences, this isolate was identified as Curvularia pseudobrachyspora. Pathogenicity tests by agar plug method revealed that this fungal isolate caused brown spot disease on Costa Rican pitahaya fruits with observations similar to the natural infection. To our knowledge, this is the first report of C. pseudobrachyspora causing brown spot disease on Costa Rican pitahaya fruits in Thailand.

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引起泰国哥斯达黎加果褐斑病的假短孢子曲霉病新报道

2021年6月，在泰国南部Phatthalung省的火龙果栽培中，在哥斯达黎加火龙果(Hylocereus costaricensis)上观察到棕色斑点。受感染的火龙果表现为小的圆形棕色斑点，随后扩大为不规则形状，随着年龄的增长，症状斑点的中心变成深褐色。分离真菌，在马铃薯葡萄糖琼脂(PDA)上培养，进行形态学观察。根据甘油三酯-3-磷酸脱氢酶(gpd)、内转录间隔物(ITS)和大亚单位(LSU)组合序列的宏观和微观特征及系统发育树，鉴定该菌株为伪短孢曲霉(Curvularia pseudobrachyspora)。琼脂塞法致病性试验表明，该真菌分离物引起哥斯达黎加果褐斑病，与自然侵染结果相似。据我们所知，这是泰国首次报道假短孢子虫引起哥斯达黎加火龙果褐斑病。

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来源期刊

Chiang Mai Journal of Science MULTIDISCIPLINARY SCIENCES-

CiteScore

1.00

自引率

25.00%

发文量

103

审稿时长

3 months

期刊介绍： The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.