摘要
采用常规石蜡切片技术,对链格孢侵入苹果梨果皮的途径及潜伏结构进行了研究,结果表明:皮孔是链格孢侵入果实组织的主要通道。粘附于皮孔的孢子首先萌发产生菌丝,随后菌丝进一步扩展,使皮孔表层细胞解体,同时侵入点表皮及内侧3～4层细胞迅速栓化,限制了菌丝的扩展,形成椭圆形、卵形、多角形细胞聚集在一起的“拟薄壁细胞”,并进一步发展成为“微菌核”,在病程中表现出一段时间的休眠。
Pathway of Alternaria alternata infecting Pyrus bretchneideri peel and its latent structure were studied by general paraffin section method. The results showed that lenticels were main pathway for A. alternata infecting Pyrus bretchneideri fruits. The conidia attached to lenticel surface germinated and formed hyphae, which collapsed superficial cell of lenticel. The development of the hyphae was limited due to the lignification of epiderm and 3-4 layers of cells below it, which forced the hyphae to produce a structure as parenchyma cells which might develop a structure of aggregated cells resembling microsclerotia later and remained in dormancy.
出处
《甘肃农业大学学报》
CAS
CSCD
2005年第4期516-520,共5页
Journal of Gansu Agricultural University
基金
甘肃省农委攻关项目(项目编号:9870599)。
关键词
苹果梨
黑斑病菌
潜伏侵染
Pyrus bretchneideri
Alternaria alternate
latent infection
