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矮沙冬青雌配子体及胚胎发育研究
周江菊;唐源江;廖景平;
1.凯里学院生物科学技术系;2.中国科学院华南植物园;3.中国科学院华南植物园 贵州凯里556000;4.广东广州510650
摘要:
矮沙冬青子房单心皮1室,边缘胎座,弯生胚珠,胚珠具双珠被、厚珠心。大孢子孢原细胞发生于珠心表皮下,大孢子母细胞减数分裂形成直线排列的四分体,合点端大孢子具功能,并按蓼型胚囊发育,雌配子体成熟于4月中旬。双受精后,胚乳发育为核型。在矮沙冬青大孢子发生、雌配子体和胚胎发育过程中未发现异常现象,因此认为矮沙冬青濒危不存在雌性生殖结构与发育过程异常的内在因素。
关键词:  矮沙冬青    大孢子发生    雌配子体    受精    胚胎    胚乳
DOI:
分类号:
Fund project:中国科学院知识创新工程重要方向性项目(KSCX2-SW-104)~~
Abstract:
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