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用明视野和荧光显微镜及扫描电镜,观察胡杨花粉和胚囊的发育,结果如下:花药4 室。表皮宿存;药室内壁发育为纤维状增厚;中层2层:1层在单核花粉时消失,另1层则直至花药开裂前才完全退化;腺质绒毡层,内切向壁上分布着乌氏体。小孢子母细胞减数分裂并非高度同步的。胞质分裂为同时型,小孢子四分体为四面体形,少数为左右对称形;胼胝质壁的积累从小孢子母细胞的角隅开始。花粉散出时是 2-细胞的。胚珠在发育的早期为双珠被,以后内珠被停止发育,成为单珠被;厚珠心,含1或2个大孢子母细胞;大孢子四分体为直线形或T形排列。大孢子发生过程中胼胝质出现于二分体和四分体的横隔壁或纵隔壁,但侧壁(外壁)始终不沉积胼胝质。合点端的第1个或第2个大孢子发育为功能大孢子。蓼型胶囊。在胚囊发育过程中珠孔端的珠心组织退化,故成熟胶囊的卵器端直接与珠被和珠孔相接。
With bright field and fluorescence microscopy and scanning electron microscopy to observe the development of Populus euphratica and embryo sac, the results are as follows: anthers 4 rooms. Epidermal persistence; the inner wall of the pharmacy developed fibrous thickening; middle layer 2: layer 1 disappeared in the mononuclear pollen, the other layer until the anther dehiscence before completely degenerated; gland tapetal, the inner tangential wall Ubiquitous distribution. Microspore mother cell meiosis is not highly synchronized. Cytoplasm was split into synchro-type, microspore tetrad was tetrahedron, and a few were symmetrical. The accumulation of callose wall started from the corner of microspore mother cell. When the pollen exudes 2-cell. Ovules early in the development of double beads, after the development of the inner bead stopped growing, a single beetle; thick bead heart, containing 1 or 2 megaspore mother cells; megaspore quadrilateral linear or T-shaped arrangement. Callose occurs during megasporogenesis in both the transversal and tetrad transversal or mediastinal wall, but the lateral wall (outer wall) does not always deposit callose. The first or second megaspore on the confluent end develops into a functional megaspore. Polygonum type capsule. In the development of embryo sac Zhuadu end of the degeneration of the heart, so the mature capsule of the egg end directly with beads and beads connected.