一株石榴炭疽病病原真菌的鉴定

A Study on Pathogen Identification of Punica Granatum

为了解石榴炭疽病病原，采用形态学结合多基因系统学的方法对其进行鉴定。结果表明：该菌为喀斯特刺盘孢Colletotrichumkarstii，分生孢子直，单孢，无色，圆柱形，顶端钝圆，大小为14．6（12．3～16．3）×6．6（6．1～7．3）μm，长宽比在1．9～2．6之间，平均为2．2。附着孢圆形至近椭圆形，简单，淡褐色，全缘，大小为7．1（5．3～8．7）×5．3（4．9～5．7）μm。本文为该菌在石榴科植物上的首次报道。

Morphological characteristics and multi -gene combination analysis to identify the pathogen was studied in this paper. The result showed that the pathogen was CoUetotrichum karstii. Conidia straight, aseptate, hyaline, cylindrical, the apex rounded, 12. 3 - 16. 3 ×6. 1 - 7.3μm （ average 14. 6 × 6. 6μm） , L/W = 2. 2. Appressoria single, rotund to subelliptical, light brown, entire margin, 5.3 - 8. 7 × 4. 9 - 5.7μm （average 7.1 × 5.3μm）. This paper is the first to report this species on Punicaceae plant.