中国油料作物学报2017，Vol.39Issue(2)：228-233,6.DOI:10.7505/j.issn.1007-9084.2017.02.013
油菜菌核病病原菌核的菌丝型萌发特性
Myceliogenic germination of sclerotia of Sclerotinia sclerotiorum on rapeseed
摘要
Abstract
In recent years,sclerotia mycelial germination (led to Sclerotinia stem rot) was found at oilseed rape seedling stage in Sichuan and Hubei provinces.To better understand this new type of sclerotinia rot,studies were carried out in relation to myceliogenic germination.Rapid water uptake was observed in sclerotia during the first hour and sclerotia were saturated in approximately 2 h.Saturated sclerotia had doubled in weight and geminated myceliogenically within 4 days of incubation without exogenous nutrients at 25 ℃.Almost all sclerotium germinated myceliogenically within 11 d of incubation.High soil moisture was favorable for sclerotia to germinate myceliogenically.Younger sclerotia germinated faster.But after 9 d,the difference of germinating speed was not significant.Sclerotia could germinate myceliogenically at 10.0-30.0℃,and germinated rapidly at 20.0-27.5℃.The germination rate of sclerotia decreased with pH increasing.The highest germination rate was observed at pH 3 on the 4th day.Field inoculation test showed that sclerotia germinated myceliogenically.The mycelial germination caused Sclerotinia stem rot before initial flowering stage.The highest disease index reached 11.7％ on rapeseed seedling.关键词
核盘菌/菌核/菌丝型萌发/油菜Key words
Sclerotinia sclerotiorum/sclerotia/myceliogenic germination/rapeseed分类
农业科技引用本文复制引用
母红岩,郑露,刘浩,李国庆,姜道宏,黄俊斌..油菜菌核病病原菌核的菌丝型萌发特性[J].中国油料作物学报,2017,39(2):228-233,6.基金项目
油菜创新技术体系岗位科学家专项(nycytx-00514) （nycytx-00514）
公益性行业(农业)科研专项(201103016) （农业）
