中国胶锈属的分类研究

本文报告我国胶锈属15种,包括中国特有种4种,其中青城山胶锈(Gymnosporangium tsingchenensis)的冬孢子为单胞,是胶锈属在全世界已知种中唯一具有单胞冬孢子的种。另有4种为我国新记录,它们是杜松胶锈(G.cornutum、褐色胶锈(G.fuscum)、高又曼胶锈(G.gaeumannii)和鸟巢状胶锈(G.nidus-avis)。高又曼胶锈是在我国报告的唯一具有夏孢阶段的种。

TAXONOMIC STUDIES ON GYMNOSPORANGIUM IN CHINA

Fifteen species of the genus Gymnosporangium from China are reported in this paper. Four of them including G. tsingchenensis Wei, an interesting and unique species with 1-celled teliospore are endemic. This rust was collected and described in 1947 from western Sichuan and later found in 1976 in Xianju county of Zhejiang Province, it caused serious damage to the plantations of Cupressus funebris. G. taianum Kern is another unusual species characterized by having 4—6 germ pores arranged in a transverse zone in each cell of the 2-celled teliospores. Four other species are new records to China, i. e., G. gaeumannii Zogg, G. cornutum Arth. ex Kern, G. nidus-avis Thaxt. and G. fuscum Hedw. f. G. gaeumannii was collected for the first time from Hami of Xinjiang Autonomous Region in 1973 as the sole species known to occur in China with uredial stage in its life cycle. Specimens collected from Helan Mountain in Ningxia Autonomous Region in 1961 with telia chiefly on leaves of Juniperus rigida are identified as G. cornutum. Nevertheless, it shows somewhat difference from the European and North American species, which usually possess caulicolous telia. Comparative studies have been made between Chinese and Japanese specimens of G. cornuturn (HH-58449) kindly sent by Professor N. Hiratsuka. Both are obviously conspecific.