摘要
对日本菟丝子有较强致病力的刺盘孢菌,其在PDA培养基上的特点是,菌落桔红色,产孢量大,气生菌丝稀疏,不形成分生孢子盘和刚毛。 不太可能筛选出一个对所有寄主上的日本菟丝子都有较强致病力的菌株,但完全有可能筛选出对其中少数几个主要寄主上的菟丝子均有较强致病力的菌株。 高温高湿和伤口对菌株的侵染有利;菌株的孢子悬浮液中加入2％蔗糖或少量菟丝子压榨液可促使孢子提早萌发并提高其萌发率。 菟丝子的茎蔓尤其幼嫩部分比花穗更易感病。 固体扩大培养基的成分中,用80％麦麸加20％玉米粉配制较好,菌株的产孢量大。
The fungus with stronger pathogenicity to Cuscula japonica Choisy is Colletotrichum spp., on PDA culture midium, its characteristics is with orange or orange-red colony, high output of spores, thin airhypha, not forming acervuli and setae.It is not possible enough to screen for a strain which possesses stronger pathogenicity to C. japonica parasitizing on all host plants, but it is entirly possible to screen for which on a few main host plants.High temperature, high humidity and wounds are of benefit to infectivity. In spore suspension 2 % sucrose or a littil C. japonica squeeze juice are added, the sprouting of spore can be shifted to an earlier time and its sprouting rate can be raised.The stem of C. japonica particularly the tender portion is more susceptive than the inflorescence.A better solid extension culture midium getting high output of spores of the strain is composed of 80% wheat bran and 20% miaze flour.
出处
《广西植物》
CAS
CSCD
北大核心
1992年第1期88-94,共7页
Guihaia
基金
国家自然科学基金
关键词
日本菟丝子
刺盘孢菌
Cuscuta japonica
Colletotrichum spp.
