| 金色狗尾草的大,小孢子发生及雌,雄配子体发育 |
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| 引用本文： | 韩雪梅,牛天堂.金色狗尾草的大,小孢子发生及雌,雄配子体发育[J].草地学报,1997,5(4):228-235. |
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| 作者姓名： | 韩雪梅 牛天堂 |
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| 作者单位： | [1]山西省农业科学院农业生物技术研究中心 [2]山西省农业科学院 |
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| 摘 要： | 金色狗尾草花药壁分四层，即表皮，内壁，中层，绒毡层。表皮细胞在花粉发育过程中始终沉积呈颗粒状小体。绒毡层属腺质型。小孢子母细胞在减数分裂过程中，胞质分裂属连续型，并偶见有染色质穿壁现象。生殖细胞壁在初期具有纤维素。成熟花粉为３细胞，崆贮大量淀粉粒。金色狗尾草胚珠具有双珠被，珠孔由内珠被形成，外珠被有一突起伸向花柱。
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| 关 键 词： | 金色狗尾草 大孢子 小孢子 雌配子体 雄配子体 |
Mega-and Microsporognesis and Development of Femal and Male Gametophyte in Setaria glauca |
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| Han Xuemei,Wh Shubiao.Mega-and Microsporognesis and Development of Femal and Male Gametophyte in Setaria glauca[J].Acta Agrestia Sinica,1997,5(4):228-235. |
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| Authors: | Han Xuemei Wh Shubiao |
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| Abstract: | The anther wall of Setaria glauca consists of four layers: epidermis, endothecium ,mid-dle layer and tapetum. Accumulation of granular bodies was found in the epidermic cells during the de-velopment of pollen. The tapeturn corresponds to glandular type. The cytokinesis of hacrospore mother cells during meiosis conforms to successive type. The intercellular migration of chromatin was observed atthis hme occasionally. The early generative cell wall contains cellulose and the 3-celled Pollen grain ac-cumulates starch grains at its mature. The bitegmic and crassinucellate ovule is anatropous. The outer in-tegument has a protrusion extending to the base of style and the inner integument forms a micropyle. Thefour cells, occasionally two, three or five, of the nucellar epidends abutting the microphle enlarge con-siderably during the development of female gametophyte, thicken their wall gradually and store starchgrains at the stage of mature embryo sac. The megaspore tetrad is linear and the chalazal megaspore de-velops into uni-nucleate embryo sac. Then the uni-nucleate embryo sac forms 7-celled or 8-nucleate em-bryo sac of polygonum type following its three times division successively. |
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| Keywords: | Setaria glauca Megasporogenesis Microsporogenesis Female gametophyte Male gametophyte |
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