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- megaspore haustorium 大孢子吸器
- Genesis of megaspore and development of embryo sac in Carica papaya L. 番木瓜的大孢子发生与胚囊发育。
- With embryo sac haustorium in chalazal end,the embryo sac is Endymion type. 胚囊发育类型为英地百合型 ,合点端形成胚囊吸器。
- The chalazal end megaspore develops into the embryo sac mother cell. 合点端大孢子发育为胚囊母细胞。
- The megaspore mother cell meiosis to form a linear megaspore tetrad. 大孢子母细胞减数分裂产生直线形大孢子四分体。
- The chalazal megaspore of a linear tetrad develops into a polygonum type sac. 四分体线行排列，合点端的大孢子发育为蓼型胚囊。
- Of the four products of a megaspore mother cell, three usually abort. 在大孢子母细胞分裂产生的四个孢子中，三个会解体消失。
- The primary chalazal haustorium ramifies around the vascular tissues of the ovule. 初生合点吸器沿着胚珠的维管组织分支。
- The gametophyte is derived from the product of a reduction division in the megaspore mother cell. 该配子体是由大孢子母细胞进行减数分裂而来。
- Tuber-like-organ formatin, haustorium formation and bud formation are key steps of C. tubulosa seedling development. 结论：寄生过程遵循种子萌发长出芽管，接触寄主根形成吸器并侵入寄主根，管花肉苁蓉幼体出现3个阶段。
- The haustorium cellularizated from the micropylar end to chalazal end at the later globular stage. 球形胚晚期吸器自珠孔端向合点端逐渐细胞化。
- When the embryo differentiated cotyledons,the haustorium cells gradually degenerated,then disappear. 胚分化出子叶时，胚乳吸器自合点端向珠孔端退化。
- There is only one layer of parietal cells at the stage of sporogenous cell, megaspore mother cell and tetrad. 造孢细胞,大孢子母细胞和四分体时期,周缘细胞仅1层。
- Endosperm formation is nuclear type and the endosperm forms chalazal haustorium . 核型胚乳，合点端具胚乳吸器。
- When the haustorium cell began to degenerate,the reaction of ATPase activity on nucleus membrane is markedly reduced. 在开始退化的吸器细胞中，核膜上的ATP酶活性的反应减弱较早，内质网稍晚；
- Successive cytokinesis in the megasporocyte follows meiosis and the megaspore tetrads are linear. 大孢子母细胞减数分裂形成直线型四分体。
- The nuclear plasm of megaspore and 2 and 4 nucleate embryosac shows a positive Feulgen reaction. 大孢子母细胞及二、四核胚囊的核质显示 Feulgen 正反应。
- Function megaspore is in the chalaza and the monosporic embryo sac is chenopodiad type. 功能大孢子位于合点端，大孢子发育为蓼型胚囊。
- From its undersurface a narrow infection hypha or penetration tube pushes through the cell wall or intercellular spaces and develops into a series of hyphae or a HAUSTORIUM. 从下表面的较细的感染性的菌丝可以穿过细胞壁而发育为一系列菌丝。
- As development goes on, callose fluorescence disappears in the chalazal wall of diplosporous functional megaspore. 二倍体功能大孢子的合点端细胞壁内的胼胝质荧光消失。
