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菌物学报  2015 

引起青稞和燕麦鞘腐病的无性型菌物新属种——禾生指葡孢霉

DOI: DOI:10.13346/j.mycosystema.140079, PP. 331-340

Keywords: 无性型真菌,指葡孢霉属,形态学特征,序列分析,禾本科

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Abstract:

引起甘肃及邻省青稞和燕麦鞘腐病的病原菌为无性型真菌anamorphicfungi中一未描述的丛梗丝孢菌moniliaceoushyphomycete。该菌分生孢子梗无色,散生,直立或匍匐;交互、叉状、聚伞状或帚状分枝。产孢细胞簇生于分生孢子梗末级分枝顶端成指状或掌状,顶部常具齿状着孢点,全壁芽生式产孢。分生孢子无色、单胞,罕有一个隔膜,近球形、卵圆形、倒梨形、纺锤形、葫芦形或不规则形,表面具网状脊或疣突,在孢梗顶端常聚集成葡萄状。分生孢子群体白色,随培养物老化,渐变为淡黄色。本菌与葡萄孢属Botrytis及其他Botrytis-like形态相似属明显不同,故建立指葡孢霉属Dactylobotrys(新属);模式种为禾生指葡孢霉Dactylobotrysgraminicola(新种)。模式标本保存在中国科学院菌物标本馆(HMAS245110,主模式)和甘肃省农业科学院植物保护研究所植物病害标本室(GAPP1131,等模式)。

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