摘要
在光学显微镜和电子显微镜下分别对早期银杏珠被中分泌腔的发育、分泌物的积累及分泌细胞的超微结构进行观察。结果表明：①早期珠被中的分泌结构主要有分泌腔和分泌细胞团，主要分布在表皮下的几层细胞中；②分泌腔的发育经历了原始细胞期、液泡化期、腔间隙形成期、分泌细胞溶解期和成熟期，分泌腔以裂溶生方式形成；③分泌腔形成在珠被外区，授粉后10～30d分泌腔数量逐渐增多，体积逐渐增大并产生大量分泌物，此后随着珠被的发育分泌腔逐渐失去分泌功能；④分泌细胞的细胞壁有明显的内突现象，产生的分泌物主要通过纹孔场向腔隙内运输。
The development, accmulation of secretory products and the ultrastructure of secretory cells in integument of Ginkgo biloba L. were studied with light and electron microscopes. The results indicated that ① The secretory structures in developmental prophase of integument, which were mainly distributing through several epidermal cells, consisted of secretory cavity and the initial cell cluster of secretory cavity; ② The formation pattern of the secretory cavities was schizo-lysigeneous, with five developmental periods of the initial secretory cells, cells vacuolated, small spaces appeared between the cells, secretory cells dissolved, and secretory cells matured; ③ The secretory cavities were formed in the external integument. The number and volume of secretory cavities increased gradually, and produced mass secreted substances in 10-30 days after pollination, Subsequently, the secretory cavity gradually lost secretion function with the development of episperm; ④ The secretory cell walls showed in part ingrowth, and secreted substances produced by secretory cells seemed to be discharged from pit field to cavity.
出处
《扬州大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2010年第1期86-90,共5页
Journal of Yangzhou University：Agricultural and Life Science Edition
基金
江苏省林业三项工程项目(1XSX2008-02)
扬州大学高层人才科研启动基金资助项目(2008-09)
关键词
银杏
珠被
分泌腔
解剖结构
Ginkgo biloba L.
integument
secretory cavity
anatomical structure
