墨兰雌配子体和胚胎发生  

FEMALE GAMETOPHYTE DEVELOPMENT AND EMBRYOGENY IN CYMBIDIUM SINENSE(ANDR.)WILLD.

作　　者：叶秀[1] 郭俊彦[1] 

机构地区：[1]中国科学院华南植物研究所

出　　处：《热带亚热带植物学报》1995年第1期54-58,共5页Journal of Tropical and Subtropical Botany

基　　金：香港球槎基金

摘　　要：墨兰［Ｃｙｍｂｉｄｉｕｍｓｉｎｅｎｓｅ（Ａｎｄｒ．）Ｗｉｌｌｄ．］的胚珠倒生型，具薄珠心和二层珠被。胚囊发育为葱型，成熟胚囊为８核。从传粉到受精约１００ｄ，正常双受精。初生胚乳细胞分裂为具２—６个核的胚乳。胚具５—６细胞的胚柄。传粉到种子成熟约８个月，成熟种子只具单层细胞的种皮和一个未分化的球形胚，胚柄及胚乳核都消失。Female gametophyte development and the early embryogenesis in Cymbidium sinense were observed. The ovule is anatropous with 2 integuments and one layered nucellus around the megaspore mother cell. The mature embryo sac consists of 8nuclei and conforms to the Allium type. The interval between pollination and fertilization is about 100 days and the normal double fertilization has been observed. Primary endosperm cell divides and forms 2─6 nucleus endosperm. During the development of the embryo, a suspensor consisting of a row of 5─6 cells is formed. It takes about 8 months from the pollination to the maturation of the seed. The embryo in the mature seed is just a globular mass of 110─120 cells without diffelentiation. The endosperm nucleus and suspensor are all degenerated in the mature seed.

关 键 词：墨兰 雌配子体 胚胎发生 

分 类 号：Q949.718.4[生物学—植物学]