摘要
研究了纹枯病菌侵入玉米叶鞘的显微和超微过程 ,结果表明 :在接种病菌后12～24h,病菌可通过表皮、气孔和自然孔口3种途径侵入寄主 ,其中以表皮直接侵入为主。侵染垫是病菌主要侵入结构。接种12h,可在叶鞘表面形成少量近圆形的侵染垫。接种24h ,则有大量侵染垫形成 ,侵染垫下可见侵入钉直接侵入寄主表皮。接种24h后叶鞘组织细胞内可见大量侵入的菌丝。
The penetration process to maize plant sheath by Rhizoctonia solani AG1-IA was studied micrologically and ultramicrologically. Results showed that the pathogen was able to penetrate host through three paths such as epidermis, stomata and natural cracks 12～24h after inoculation. The direct penetration into epidermis was considered as a major way, and infection cushion was major infection structure of pathogen.12h after inoculation, massive round-shaped infection cushions of pathogen formed, and even more formed 24h after inoculation. Penetration peg under infection cushion was easily seen and its penetration into epidermis was also observed. After 24h from inoculation, a large number of pathogen mycelium were found within sheath tissue.
出处
《沈阳农业大学学报》
CAS
CSCD
2000年第5期503-506,共4页
Journal of Shenyang Agricultural University
基金
国家九五科技攻关课题资助项目 !(96005010303)
关键词
玉米
纹枯病菌
侵染过程
maize
sheath blight pathogen
penetration process\
