一株自发产生孢子捕食器的捕食线虫真菌——Dactylellina parvicolla WZ27

Dactylellina parvicolla WZ27, a spontaneous conidial trap producing strain of nematode-trapping fungus

对云南省大理苍山火烧遗迹地土壤中的捕食线虫真菌资源进行调查过程中,发现一株能自发产生孢子捕食器官的捕食线虫真菌,编号WZ27,经形态和分子鉴定为细颈亚隔指孢Dactylellina parvicolla。该株菌的主要特征为不需要经过任何物质的诱导即可自发产生孢子捕食器,其自发形成孢子捕食器官的百分率达到18.3%,通过线虫与牛粪的诱导,孢子捕食器官的形成明显增加。同时与细颈亚隔指孢D.parvicolla参考菌株相比,捕食器官生成时间要更短(P<0.001),且捕食率高于参考菌株(P=0.003)。

A strain of nematode-trapping fungus WZ27, which could spontaneously produce conidial trap without any exogenous induction, was isolated from the burned field in Cangshan mountain, Dali, Yunnan Province. Based on morphological and molecular identification the strain was referred to Dactylellina parvicolla. The percentage of the spontaneously producing conidial trap was 18.3%, and the number of conidial trap can be significantly increased by induction of nematode and cow dung. Compared with the reference strain, the trapping device formation time of our strain was shorter（P0.001）, and the nematode trapping efficiency was higher（P=0.003）.