Marincowitz S, Pham N Q, Wingfield B D, Roets F, Wingfield M J
Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Hatfield, 0028, South Africa.
Department of Plant and Soil Sciences, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Hatfield, 0028, South Africa.
Fungal Syst Evol. 2023 Nov;12:59-71. doi: 10.3114/fuse.2023.12.04. Epub 2023 Jul 31.
is a succulent shrub that is indigenous to South Africa and widely distributed throughout the country. Dying plants have been observed in their natural habitat in the Northern and Western Cape Provinces of South Africa in recent years. Stems displaying lesions were collected and the emerging cultures were identified based on ITS, LSU, , , and/or sequence data. Four filamentous fungi were consistently observed and isolated. One was identified as () , and the other three were new to science and are described here as ., . and (.) These new species and were the most commonly encountered, and their pathogenicity was tested on plants in a greenhouse trial. All four species gave rise to lesions that were significantly larger than those associated with the controls, but they were not significantly different to each other. Although the lesions associated with the inoculations were well-developed, they did not give rise to plant death, suggesting that they are not responsible for the large-scale die-off of in the field. The primary cause of the death of in the studied area remains unknown and could be due to environmental factors such as has been found with the die-off of in South Africa. Marincowitz S, Pham NQ, Wingfield BD, Roets F, Wingfield MJ (2023). Microfungi associated with dying in South Africa and their relative pathogenicity. : 59-71. doi: 10.3114/fuse.2023.12.04.
是一种肉质灌木，原产于南非，在该国广泛分布。近年来，在南非北开普省和西开普省的自然栖息地中观察到了濒死植物。收集了显示病变的茎，并根据ITS、LSU、 、 和/或 序列数据对新出现的培养物进行了鉴定。一致观察并分离出四种丝状真菌。一种被鉴定为 （） ，另外三种是科学上新发现的，并在此描述为 、 和 （.） 这些新物种和 是最常遇到的，并且在温室试验中对 植物测试了它们的致病性。所有四个物种引起的病变都明显大于与对照相关的病变，但它们彼此之间没有显著差异。尽管与接种相关的病变发育良好，但它们并未导致植物死亡，这表明它们不是导致田间 大规模死亡的原因。研究区域内 死亡的主要原因仍然未知，可能是由于环境因素，就像在南非 死亡事件中发现的那样。马林科维茨S、范恩Q、温菲尔德BD、罗茨F、温菲尔德MJ（2023年）。与南非濒死 的微真菌及其相对致病性。 ：59 - 71。doi：10.3114/fuse.2023.12.04 。 （注：原文中部分内容缺失，翻译时保留了原文格式）
