Department of Plant Pathology, Universidade Federal de Lavras, 3037, Lavras, Minas Gerais, Brazil.
Department of Plant Pathology, Universidade Federal do Tocantins, 66, Gurupi, Tocantins, Brazil.
Fungal Biol. 2024 May;128(3):1790-1799. doi: 10.1016/j.funbio.2024.04.001. Epub 2024 Apr 8.
Species in the Melastomataceae (Myrtales) include trees and woody shrubs that are amongst the most common hosts of Chrysoporthe and related fungi. These fungi cause stem cankers, branch death and in extreme cases, kill their hosts. Chrysoporthe-like fungi were observed on Miconia spp. and Rhynchanthera grandiflora (Melastomataceae) plants during tree disease surveys in south-eastern Brazil including the states of Minas Gerais and Rio de Janeiro. The aims of this study were to isolate and identify the fungi utilising morphological characteristics and phylogenetic analyses. This led to the identification of a new species of Chrysoporthe described here as Chrysoporthe brasilensis sp.nov. Inoculations were conducted on R. grandiflora and M. theaezans, showing that C. brasiliensis is an aggressive pathogen. This study adds to a growing number of reports of new and pathogenic species of Chrysoporthe that potentially threaten native Myrtales globally, including important trees such as Eucalyptus, both in natural ecosystems and in planted forests.
野牡丹科（桃金娘目）中的物种包括树木和木本灌木，它们是樟巢螟和相关真菌的最常见宿主之一。这些真菌会导致茎溃疡、树枝死亡，在极端情况下会导致宿主死亡。在巴西东南部的树木疾病调查中，包括米纳斯吉拉斯州和里约热内卢州，观察到樟巢螟样真菌出现在米索尼娅属和 Rhynchanthera grandiflora（野牡丹科）植物上。本研究的目的是利用形态特征和系统发育分析对真菌进行分离和鉴定。这导致了一种新的樟巢螟的鉴定，被描述为 Chrysoporthe brasilensis sp.nov.。对 R. grandiflora 和 M. theaezans 进行了接种，结果表明 C. brasiliensis 是一种具有侵袭性的病原体。这项研究增加了越来越多的关于樟巢螟新的和致病性物种的报告，这些物种可能对全球的原生桃金娘目植物构成威胁，包括桉树等重要树木，无论是在自然生态系统还是人工林。
