与夏威夷多形田鼠快速死亡有关的角鼻虫新种。

IF 9.5 1区 生物学 Q1 MYCOLOGY
Persoonia Pub Date : 2018-12-01 Epub Date: 2018-03-27 DOI:10.3767/persoonia.2018.40.07
I Barnes, A Fourie, M J Wingfield, T C Harrington, D L McNew, L S Sugiyama, B C Luiz, W P Heller, L M Keith
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引用次数: 80

摘要

当地的'ōhi'a乐花(Metrosideros polymorpha)对夏威夷具有文化、生物和生态意义,但它受到一种通常被称为'ōhi'a快速死亡(ROD)的疾病的严重威胁。初步调查发现一种角鼻虫属,与C. fibriata s.lat相似。是导致疾病的原因。在这项研究中,我们结合了系统发育、形态和生物物种概念,以及致病性测试和微卫星分析,对从夏威夷岛上患病的“ōhi”树中收集的分离物进行了表征。在多基因系统发育分析的基础上,发现了两个不同的分支,代表了角鼻虫的新种。这里描述的是C. lukuohia和C. huliohia。lukuohia角鼻虫(Ceratocystis lukuohia)是拉丁美洲分支(LAC)的一部分,与来自加勒比海和其他地方(包括夏威夷)的Syngonium和Xanthosoma分离株以及原产于美国东部的C. platani最密切相关。huliohia角鼻虫(Ceratocystis huliohia)属于亚洲-澳大利亚分支(AAC),与原产于亚洲的C. uchidae、C. changhui和C. cercfabiensis亲缘关系最密切。形态学和杂交试验支持这两个新种的描述,致病性试验表明这两个物种都是多形草幼苗的侵袭性病原体。利用微卫星标记对分离物进行鉴定表明,这两个物种都是无性系,很可能代表最近引进的菌株。目前正在进行深入研究,以制定早期发现病原体的快速筛选方案和管理战略,以防止病原体传播到目前没有疾病的夏威夷其他岛屿。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

New <i>Ceratocystis</i> species associated with rapid death of <i>Metrosideros polymorpha</i> in Hawai'i.

New <i>Ceratocystis</i> species associated with rapid death of <i>Metrosideros polymorpha</i> in Hawai'i.

New <i>Ceratocystis</i> species associated with rapid death of <i>Metrosideros polymorpha</i> in Hawai'i.

New Ceratocystis species associated with rapid death of Metrosideros polymorpha in Hawai'i.

The native 'ōhi'a lehua (Metrosideros polymorpha) has cultural, biological and ecological significance to Hawai'i, but it is seriously threatened by a disease commonly referred to as rapid 'ōhi'a death (ROD). Preliminary investigations showed that a Ceratocystis species similar to C. fimbriata s.lat. was the cause of the disease. In this study, we used a combination of the phylogenetic, morphological and biological species concepts, as well as pathogenicity tests and microsatellite analyses, to characterise isolates collected from diseased 'ōhi'a trees across Hawai'i Island. Two distinct lineages, representing new species of Ceratocystis, were evident based on multigene phylogenetic analyses. These are described here as C. lukuohia and C. huliohia. Ceratocystis lukuohia forms part of the Latin American clade (LAC) and was most closely associated with isolates from Syngonium and Xanthosoma from the Caribbean and elsewhere, including Hawai'i, and C. platani, which is native to eastern USA. Ceratocystis huliohia resides in the Asian-Australian clade (AAC) and is most closely related to C. uchidae, C. changhui and C. cercfabiensis, which are thought to be native to Asia. Morphology and interfertility tests support the delineation of these two new species and pathogenicity tests show that both species are aggressive pathogens on seedlings of M. polymorpha. Characterisation of isolates using microsatellite markers suggest that both species are clonal and likely represent recently-introduced strains. Intensive research is underway to develop rapid screening protocols for early detection of the pathogens and management strategies in an attempt to prevent the spread of the pathogens to the other islands of Hawai'i, which are currently disease free.

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来源期刊
Persoonia
Persoonia MYCOLOGY-
CiteScore
17.70
自引率
5.50%
发文量
10
审稿时长
3 months
期刊介绍: Persoonia aspires to publish papers focusing on the molecular systematics and evolution of fungi. Additionally, it seeks to advance fungal taxonomy by employing a polythetic approach to elucidate the genuine phylogeny and relationships within the kingdom Fungi. The journal is dedicated to disseminating high-quality papers that unravel both known and novel fungal taxa at the DNA level. Moreover, it endeavors to provide fresh insights into evolutionary processes and relationships. The scope of papers considered encompasses research articles, along with topical and book reviews.
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