摘要
采用常规石蜡切片方法,对耳叶补血草进行了大孢子发生和雌配子体发育的研究。研究表明:耳叶补血草的雌蕊由5心皮组成,柱头、花柱分离,子房合生,1室,基生胎座,胚珠1个,拳卷型,双珠被,厚珠心,珠孔由内珠被形成,孢原细胞发生于珠心表皮下,经一次平周分裂,形成造孢细胞,由造孢细胞直接发育成大孢子母细胞,大孢子母细胞减数分裂形成4个大孢子呈直线排列,合点端大孢子具功能,属于典型的蓼型胚囊发育。
Reported in this paper were the megasporogenesis and the development of female gametophyte of the species Limonium otolepis （Schrenk） Kuntze.by means of paraffin. The resuhs were as follows：based on the cross section of a flower, the pistil was composed of five carpels, stigmas and styli separate, the ovary was coadnate, basal placenta, it had only one circinotropous ovule, the ovule was crassinucellate and had two layers of integument, the micropyle was formed by the inner integument, the archesporial cell come from the nucella ceils under the epidermis layer and formed the sporogenous cell after periclinal division, then the sporogenous cell developed into the megaspore directly, the megasporocyte underwent meiosis and gave rise to a linear tetrad of megaspore, the chalazal megaspore was functional and developed into mature embryonary sac. The development pattern of female gametophyte was the Polygonum type.
出处
《石河子大学学报（自然科学版）》
CAS
2005年第4期454-456,共3页
Journal of Shihezi University(Natural Science)
基金
国家重大基础研究前期研究专项基金资助项目(2002CCA02800)
关键词
大孢子发生
雌配子体发育
耳叶补血草
megasporogenesis
the development of female gametophyte
Limonium otolepis
