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- micropylar haustorium of endosperm 胚乳珠孔端吸器
- micropylar haustorium 珠孔吸器
- 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。
- TEM image of a section through the micropylar center was obtained. 还拍摄到了通过卵孔中心的纵切面映象。
- 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 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。
- One of the nuclei at the micropylar pole becomes dlimited by a small amount of cytoplasm. 珠孔端有一个核,因为带有少量细胞质而变成界线分明。
- One of the nuclei at the micropylar pole becomes delimited by a small amount of cytoplasm. 珠孔端有一个核,因为带有少量细胞质而变成界线分明。
- 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。
- Synergid cells Two haploid cells located near the egg cell at the micropylar end of the embryo sac in flowering plants. 助细胞:存在于开花植物胚囊内,是位于珠孔端的卵细胞两侧的两个单倍体细胞。
- 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。
- The ovules were cut from middle part and pushed its micropylar position using a dissection needle. 再用显微操作仪的玻璃针将卵细胞和两个助细胞分开,达到分离葱卵细胞的目的。
- Endosperm formation is nuclear type and the endosperm forms chalazal haustorium . 核型胚乳,合点端具胚乳吸器。
- Micropylar collar and the undeveloped forms of operculum were differentiated at the micropylar region. 珠孔区有珠孔领和孔盖的分化,但珠孔领分化不完善。
- 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;
- Micropylar collar, operculum and parenchyma cells are differentiated at micropylar region. 种子珠孔区分化出珠孔领、孔盖和珠孔区薄壁细胞。
- Firstly, several layers of the nucellar cells at the micropylar end elongate longitudinally. 接着,位于珠心组织最上部(珠孔端)的珠心细胞启始死亡;
- Seeds ellipsoid, glabrous, nearly without endosperm, with thickened tissue at micropylar end. 种子椭圆形,无毛,近无胚乳,在珠孔端具加厚组织。
- 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。
- Wall ingrowths occurred in central cell at micropylar region near embryo sac wall. 中央细胞在珠孔端与胚囊壁相邻的部位形成壁内突。