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- synergid haustorium 助细胞吸器
- 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。
- Pollen tube entered one synergid, and released two sperms between egg and central cells. 精子脱掉细胞质鞘后,形成精核与细胞质体;
- 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。
- Additional embryo resulted from the fertilized synergid was observed in T. chinensis. 助细胞被受精产生多胚现象。
- 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。
- The persistent synergid may still have a synthetic function as its cell wall becomes thick and lipids occur. 因宿存助细胞壁变厚,细胞质内出现脂滴,宿存助细胞可能仍有合成功能。
- The cell wall surrounds the cell, but its chalzal ends and the lateral wall with synergid is discontinuous. 细胞外被细胞壁,其合点端及侧方与助细胞共同壁不连续。
- 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。
- 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;
- Mature embryo sac has 8 nucleis.Egg cell has obvious polarity.One synergid degenerates before fertilization, the other does after fertilization. 成熟胚囊为八核七细胞,卵细胞极性明显,助细胞在极核融合前已退化一个,另一个宿存,宿存助细胞丝状器明显,并保留退化助细胞的痕迹。
- After pollination one synergid degenerates and one synergid still exists during the ellipsoidal embryo stage and undergoes a slow degeneration. 传粉后,一个助细胞退化,宿存助细胞至椭形胚期尚存在。
- 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。
- The synergid possesses a larger nucleus located in the expanded portion of the cell and many small vacuoles throughout the cytoplasm. 助细胞有一较大的核,位于细胞膨大的部位,众多的小液泡遍布细胞质中。
- During formation of the dikaryotic haustorium, there were collars formed around the neckand tubles in cytoplasm in host cell. (4)在双核吸器形成过程中,寄主细胞可分泌胼胝质和产生与侵染有关的管状结构。
- At the early globular embryo,the chalazal portion of the embryo sac grown into tubular haustorium,which still remained coenocytic. 球形胚早期,胚囊合点端的壁伸长发育成一管状胚乳吸器,进而吸器靠近胚乳本体端膨大为囊状。
- Pollen tube entered and destroyed one synergid and released successive round staff between egg and central cells.One sperm nucleus entered egg and the other entered central cell. 两个精核分别进入卵细胞和中央细胞分别与卵核和极核融合。