Ceratocystis atrox sp. nov. associated with Phoracantha acanthocera infestations on Eucalyptus grandis in Australia
Ceratocystis atrox sp. nov. associated with Phoracantha acanthocera infestations on Eucalyptus grandis in Australia
复制标题
DOI：
10.1071/ap07042
复制
发表时间：
2007-08
影响因子：
1.4
通讯作者：
M. Wyk;G. Pegg;S. Lawson;M. Wingfield
中科院分区：
文献类型：
--
作者：
M. Wyk;G. Pegg;S. Lawson;M. Wingfield
长喙壳属包括重要的树木病原体以及明显的寄生物种。在澳大利亚的巨桉（Eucalyptus grandis）上已记录有4种植物，其中只有一种，C.梨状巴恩斯和M.J.Wingf.，是已知的致病性。最近对北方昆士兰州桉树病虫害的调查发现，一种与蛀木害虫刺角褐天牛Phoracantha acanthocera（Macleay）（天牛科：鞘翅目）所形成的蛀道有关的长喙壳属（Ceratocystis）。本研究的目的是根据形态特征和三个基因区域的DNA序列数据的比较来鉴定真菌。该真菌的外围类似于C。伞花还有霍斯特但与本种最明显的区别在于菌丝颜色深得多，子囊颈长，菌丝分节，无粉孢子。对组合序列数据的比较证实，来自棘角单胞菌的Ceratocystis sp.代表一个未描述的分类单元，其名称为Ceratocystis atrox sp. nov. C. atrox似乎与P. acanthocera有密切的关系，尽管其在昆虫生物学中的作用尚不清楚，其致病性也未被考虑。
Ceratocystis spp. include important pathogens of trees as well as apparently saprophytic species. Four species have been recorded on Eucalyptus grandis in Australia, of which only one, C. pirilliformis Barnes and M.J. Wingf., is known to be pathogenic. A recent survey of pests and diseases of Eucalyptus trees in northern Queensland revealed a species of Ceratocystis associated with the tunnels made by the aggressive wood-boring insect Phoracantha acanthocera (Macleay) (Cerambicydae: Coleoptera). The aim of the present study was to identify the fungus based on morphological characteristics and comparisons of DNA sequence data for three gene regions. The fungus peripherally resembles C. fimbriata Ell. and Halst. but differs from this species most obviously by having much darker mycelium, longer ascomatal necks, segmented hyphae and an absence of aleuroconidia. Comparisons of combined sequence data confirmed that the Ceratocystis sp. from P. acanthocera represents an undescribed taxon, which is provided with the name Ceratocystis atrox sp. nov. C. atrox appears to have a close relationship with P. acanthocera, although its role in the biology of the insect is unknown and its pathogenicity has not been considered.