论文部分内容阅读
对高频率多胚水稻 (OryzasativaL .)ApⅢ受精前后卵器的细胞结构和组织化学变化进行了观察 ,并同已报道的正常水稻和多胚水稻大至相同发育时期的卵器进行了比较 ,结果表明 :ApⅢ的 2 932个幼嫩子房中 ,每个子房只有一个胚囊。没有看到含有一对胚囊和每个胚囊里有一套卵器的现象。除解体的和含胚的胚囊外 ,16 5 5个胚囊中 ,含 1个卵细胞和 2个助细胞组成的正常卵器为 16 4 3个 (99.2 7% ) ,含 2个卵细胞和 2个助细胞的 4细胞卵器为 12个 (0 .73% )。没有观察到大量 4细胞卵器、5细胞卵器 (即由 3个卵细胞和 2个助细胞组成 )和卵状细胞 ,以及其他 4卵、5卵卵器的变异类型。卵细胞位于对着子房壁维管束一侧。细胞质含丰富的蛋白质和多糖颗粒 ;细胞核位于细胞中下部 ,少有偏远轴端的 ,直到合子分裂前由蛋白质物质和多糖颗粒聚成的环所包裹。成熟胚囊中常见2个助细胞。助细胞位于珠孔端靠子房壁维管束一侧 ,多数为长颈烧瓶状 ,少有长形和星月形的。其珠孔端壁内侧丝状器发达 ,细胞质的结构 ,蛋白质物质和多糖颗粒的积累、分布及消长 ,细胞核的大小、组织化学反应和周围物质的动态与卵细胞的相同。此外 ,ApⅢ的 2个助细胞存留时间较长。当花粉管进入助细胞的早期 ,助细胞的丝状器和帽颈端被花粉管损伤 ,中下部
The cell structure and histochemical changes of ovary before and after fertilization of Apryx in high frequency and multiple embryo rice (Oryzasativa L.) were observed and compared with the reported ovules of normal rice and polyembryonic rice up to the same developmental stage. Results Show: Ap Ⅲ 2 932 young ovary, only one embryo sac per ovary. Did not see a pair of embryo sac and each embryo sac has an egg phenomenon. In addition to the disintegrated and embryo-derived embryo sacs, 16 4 3 (99.2 7%) normal oviposit bodies with one egg cell and two helper cells in 16 5 5 embryo sacs contained 2 oocytes and 2 The average number of 4-cell egg cells in a helper cell was 12 (0.73%). No large numbers of 4-cell arches, 5-cell arches (ie, 3 oocytes and 2 helper cells) and ovoids, as well as other 4 ova and 5 ova were observed. The egg cell is located on the side of the vascular bundle facing the wall of the ovary. The cytoplasm is rich in protein and polysaccharide particles; the nucleus is located in the lower part of the cell, few remote axis ends, until the zygotic division before the protein material and polysaccharide particles polycyclic ring wrapped. Mature embryo sac 2 common helper cells. Helper cells located in the side of the drupe by the side of the wall of the vascular bundle, the majority of long-necked flask-shaped, rarely long and Xing Yue-shaped. The inner side of the peritoneal wall of the filamentous well-developed, cytoplasmic structure, accumulation and distribution of protein substances and polysaccharide particles, growth and decline, the size of the nucleus, histochemical reactions and the surrounding substances with the same motility and egg cells. In addition, Ap III’s 2 helper cells last longer. When the pollen tube enters the early stages of the helper cells, the helper cells’ filamentous and cap-nosed ends are damaged by pollen tubes,