摘要
甘草(Glycyrrhiza uralensis Fisch.)花药壁的发育属双子叶型。花粉母细胞减数分裂时的胞质分裂为同时型。四分孢子主要呈四面体型,也有左右对称型和交叉型。小孢子有各种败育形式。成熟花粉粒为二细胞型。双珠被、厚珠心,弯生胚珠。大孢子母细胞产生不等二分体、线状四分体。合点端大孢子,珠孔端第二或第三大孢子均可成为功能大孢子。胚囊发育属蓼型。成熟胚囊有各种形式的变异。受精作用属有丝分裂前配子融合类型。胚发育以柳叶菜型为主。核型胚乳;合点端具胚乳吸器。
This paper reports the studies of overall embryology of Glycyrrhiza uralensis Fisch. Development of the anther wall follows the dicotyledonous type. The cytokinesis of the microspore mother cell in meiosis is of simultaneous type. The arrangement of microspores in tetrad is retra-hedral, isobilateral and decussate. Microspores have various types of abortive to development. Mature pollen grain is of the 2-celled type. The ovule is bitegminous, crassinucellate and campylo-tropous. The megaspore mother cell gives rise to unequal dyad and then linear tetrad. The cha-lazal megaspore, the second or the third megaspore towards the micropylar end are functional megaspore. The development of the embryo sac conforms to the Polygonum type. Mature embryo sac has various types of variation. The fertilization belongs to the premitotic type of syn-gamy. The development of most embryoes belongs to the Onagrad type. The development of the endosperm belongs to the nuclear type and the endosperm near the chalazal end develops into haustorium.
基金
国家自然科学基金资助课题
关键词
甘草
胚胎学
Glycyrrhiza uralensis Fisch.
Embryology
