中国匍柄霉属分类研究Ⅲ:生于数科植物上的四个新种

Taxonomic studies of Stemphylium from China Ⅲ:Four new species on plants of several families

报道匍柄霉属的四个新种:播娘蒿匍柄霉Stemphylium descurainiae、绣球匍柄霉Stemphylium hydrangeae、豌豆匍柄霉Stemphylium pisi和塔形匍柄霉Stemphylium turriforme。研究过的标本(干制培养物)及活菌种保存在山东农业大学植物病理学标本室(HSAUP)。

Four new species in the genus Stemphylium, S. descurainiae, S. hydrangeae, S. pisi and S. turriforme are reported. S. descurainiae is characterized by having smooth-walled conidia with which it is distinguishable from its closely related species, S. bolickii, S. vesicarium and S. rosarium. The main distinction between S. hydrangeae and its allied species, S. solani, S. lycopersici and S. nabarii is that the conidia of this new taxon are relatively long （L/W = 3～3.5）. Although the conidium shape of S. pisi, S. turriforme and S. lancipes is somewhat similar, the conidium size range and the ratio of long to width （L/W） of conidia are very useful in distinguishing them from each other. The conidia of S. pisi are smaller than those of S. lancipes （75～80 × 20～251arn）, but are much bigger than those of S. turriforme. Besides, the conidia of S. lancipes are relatively thin and long （L/W = 3.2～3.8）, while those of S. pisi （L/W = 1.9～2.5） and S. turriforme （L/W = 2.2） are relatively short. Specimens （dried cultures） and living cultures are deposited in the Herbarium of Shandong Agricultural University： Plant Pathology （HSAUP）.