AscoFrance, 64 route de Chizé, F-79360, Villiers en Bois, France;
IMA Fungus. 2010 Dec;1(2):101-8. doi: 10.5598/imafungus.2010.01.02.01. Epub 2010 Nov 2.
Species of Calonectria are common saprobes and plant pathogens on a wide range of hosts occurring in subtropical to tropical regions of the world. The aim of the present study was to resolve the status of new Calonectria collections obtained on Ilex leaves from France. Based on DNA sequence data of their β-tubulin and histone gene regions, as well as morphology, the new collections matched the ex-type strain of Cylindrocladium ilicicola. On the host and in culture, yellow to brownish-yellow perithecia were observed that did not strain red in 3 % KOH. Based on these results, C. ilicicola and its purported teleomorph, Ca. pyrochroa, were shown to represent two distinct species, as the latter has bright red perithecia that strain purple in KOH. A new combination, Ca. lauri, based on Tetracytumlauri, is subsequently proposed for C. ilicicola. Calonectria lauri is distinct from Ca. ilicicola, a pathogen commonly associated with Cylindrocladium black rot of peanut. Finally, Ca. canadiana is proposed as new name for Cy. canadiense, which is a nursery pathogen involved with root rot of several tree genera in Quebec, Canada.
假旋孢腔菌属的种是在世界亚热带到热带地区广泛存在的多种宿主上的常见腐生菌和植物病原菌。本研究的目的是确定在法国冬青叶上获得的新假旋孢腔菌属分离物的地位。基于其 β-微管蛋白和组蛋白基因区域的 DNA 序列数据以及形态学特征，新的分离物与 Cylindrocladium ilicicola 的模式菌株相匹配。在宿主和培养物上，观察到黄色到棕黄色的子囊壳，在 3% KOH 中不呈现红色。基于这些结果，C. ilicicola 和它假定的无性型 Ca. pyrochroa 被证明是两个不同的种，因为后者的子囊壳具有鲜艳的红色，在 KOH 中呈现紫色。随后，基于 Tetracytum lauri，提出了一个新的组合，Ca. lauri，用于 C. ilicicola。Calonectria lauri 与 C. ilicicola 不同，后者是与花生黑腐病相关的病原体。最后，Ca. canadiana 被提议作为 Cy. canadiense 的新名称，后者是加拿大魁北克几种树木属根腐病的苗圃病原体。
