核盘菌科一新种—细辛核盘菌

 细辛核盘菌,Sclerotinia asari Wuet C.R.waug,是核盘菌属的一个新种。它能为害细辛的根、茎、叶、果等各个部分发生毁灭性的菌核疫病。它的主要寄主是细辛;其形态特征、生物学特性均与S.sclerotiorum不同。菌丝体无色,有分隔,宽3.0~7.5微米。菌核大小差异很大,较大的为17~30×20毫米;较小的为0.4×0.3毫米。一颗菌核可萌生子囊盘1~9枚,子囊盘鲜褐色,直径为3~20毫米,柄长5~70毫米。子囊棍棒状,无色,10.25×165.0×7.5~10.0微米。子囊孢子单胞、无色、长椭圆形,10.0~17.5×4.3~7.5微米。附着胞球形,无色,直径3~5微米。并做了中文与拉丁文的形态描述。

SCLEROTINIA ASARI WUET C.R.WANG,A NEW SPECIES OF SCLEROTINIACEAE

A new species of Sclerotinia asari Wuet C.R.Wang caused rots of roots,leaves,petioles,fruits and seeds on Asarum heterotropoides Schmidtvar.mandshuricum(Maxim.) Kitag.is reported.The fungus produced numerous,black,variable sized,irregular shaped,smooth sclerotia in diseased tissues.Brownish apothecia rising singly or in small groups 1 to 9 in number,usually 2 to 3 formed from germinated sclerotia.Discconcave was 3 to 20 mm across.Asci,club-shape,were 102.5~165.0×4.3~7.5μ in size,8-spored.Ascospores,ellipsoidal haped,10.0~17.5×4.3~7.5μ,arranged uniseriately.Paraphyses,cylindrical,2~2.5μ thick were resent.No other conidial state is observed.This new species merely caused damage on A.heterotropoides var.mandshricumunder inoculation tests both in the laboratory and ields.Chinese andLatin diagnosis for the new species are given.The type specimen is deposited in the Mycological Herbarum of Shenyang Agricultural College.