Annesi T, Coppola R, D'Amico L, Motta E
Istituto Sperimentale per la Patologia Vegetale (ISPaVe), via C. G. Bertero 22, 00156 Rome, Italy.
Plant Dis. 2005 Jan;89(1):107. doi: 10.1094/PD-89-0107C.
Inonotus rickii (Pat.) D. Reid (Hymenochaetaceae), widespread in tropical and subtropical countries, produces cankers and decay in several hardwoods. In Italy, it was recorded for the first time approximately 20 years ago on Parkinsonia sp. and Schinus molle L. in Sicily (2) and more recently on Acer negundo L. and Celtis australis L. in Rome (1). During May 2004, a survey was performed in Sicily in public and botanical gardens where the fungus had been detected in the past. Although the previously attacked plants had been removed, more trees were showing decline symptoms, with sparse foliage and some dieback. Typical brown, powdery masses of chlamydospores of I. rickii were observed near wounds or pruning cuts on Quercus cerris L. in Palermo and Sambucus nigra L. and Aberia caffra Hook. F. & Harv. in Catania. From each fungal specimen, fragments were isolated and cultured on malt agar. Cultures produced acute, thick-walled, brown setae (as much as 250 µm long) and abundant chlamydospores that were yellowish brown, thick walled, irregularly shaped, and 10 to 12 × 8 to 12 µm. Each isolate conformed to I. rickii (3). Cultures and voucher specimens have been deposited in the ISPaVe collection (PF40, PF41, and PF42) and the ROPV herbarium (772, 773, and 774). To our knowledge, this is the first report of I. rickii in living Q. cerris and A. caffra. S. nigra is a new host in Italy. This record shows that the pathogen has fully established itself in southern Europe where it may expand its host range. References: (1) T. Annesi et al. For. Pathol. 33:405, 2003. (2) M. Intini. Micol. Ital. 20:49, 1988. (3) J. A. Stalpers. Karstenia 40:167, 2000.
里克木层孔菌（Inonotus rickii (Pat.) D. Reid）（锈革孔菌科）广泛分布于热带和亚热带国家，可在多种硬木上引发溃疡和腐朽。在意大利，大约20年前首次在西西里岛的牧豆树属植物（Parkinsonia sp.）和垂叶金合欢（Schinus molle L.）上发现该菌（2），最近在罗马的复叶槭（Acer negundo L.）和南欧朴树（Celtis australis L.）上也有发现（1）。2004年5月，在西西里岛的公共花园和植物园进行了一次调查，这些地方过去曾检测到这种真菌。尽管之前受感染的植物已被移除，但更多的树木出现了衰退症状，树叶稀疏且有一些枯枝。在巴勒莫的栓皮栎（Quercus cerris L.）以及卡塔尼亚的黑接骨木（Sambucus nigra L.）和南非刺李（Aberia caffra Hook. F. & Harv.）的伤口或修剪切口附近，观察到了里克木层孔菌典型的棕色粉状厚垣孢子团。从每个真菌标本中分离出片段，并在麦芽琼脂上进行培养。培养物产生了尖锐、壁厚的棕色刚毛（长达250微米）和大量厚垣孢子，这些厚垣孢子呈黄棕色，壁厚，形状不规则，大小为10至12×8至12微米。每个分离株均符合里克木层孔菌的特征（3）。培养物和凭证标本已保存在意大利植物病理研究所菌种保藏中心（ISPaVe collection）（PF40、PF41和PF42）以及罗马植物病理研究所标本馆（ROPV herbarium）（772、773和774）。据我们所知，这是里克木层孔菌在活的栓皮栎和南非刺李上的首次报道。黑接骨木是该菌在意大利的新寄主。这一记录表明该病原菌已在南欧完全定殖，并且可能会扩大其寄主范围。参考文献：（1）T. Annesi等人，《森林病理学》33:405，2003年。（2）M. Intini，《意大利真菌学》20:49，1988年。（3）J. A. Stalpers，《卡尔斯特尼亚》40:167，2000年。
