| 摘要: |
| 对石刁柏的生殖生物学特性进行了研究,结果如下:①花药壁发育为单子叶型,药壁由表皮、药室内壁、中层、绒毡层4层细胞组成。绒毡层具分泌型及介于分泌型与变形型之间的第3种类型;②小孢子母细胞减数分裂胞质分裂连续型,四分体左右对称。成熟花粉粒2细胞,单萌发沟;③电镜下,花粉粒壁具内壁、外壁二层结构。外壁由外壁外层、外壁内层组成,其中外壁外层又分为覆盖层、基粒棒、基足层3部分。④倒生胚珠。蓼型胚囊,助细胞珠孔端具扫帚状分枝丝状器。 |
| 关键词: 石刁柏,雌雄异株,配子体 |
| DOI： |
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| Microsporogensis and Megasporogenesis and Formation of Male and Female Gametophyte in Asparagus officinalis. L. |
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Zhu Hua Yang Shuxing
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| Abstract: |
| The reproductive or genesis biocharacteristics of Asparagus officinalis L. were studied with the research results shown in the following:1. The type of anther development is monocotyledonous. Anther wall consists of four-layer cells including epidermis,endothecium, Middle layer and tapetum. The tape-tum is of the secretory type and the third type between the secretory type and the amoeboid type.2. The meiosis of micoospoer mother cell is the cytokinesis successive type, The type of arrangement of tetrad is bilateral. The mature pollen grain has two cells with mono-mono-germinal forrow.3. Under electron microscope, the mature pollen grain wall consists of exine and inline. The exine is divided into sexine and nexine. of which, the sexine consists of bac-ularium. tectum and foot layer.4. Anatropous ovuleo polygonum type, the synergids has broomy branch filiform apparatus on micropylar. |
| Key words: Asparagus officinalis, heterothallism, gametophyte |
