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- Primary endosperm nucleus and the degenerating antipodal cells;8. 7.;初生胚乳核和开始退化的反足细胞;
- The other male gamete fuses with the secondary nucleus, forming the primary endosperm nucleus. 另一个雄配子和次生核结合形成初生胚乳核。
- The pollen grain germinates on a special extension of the carpel, the stigma, and double fertilization results in a diploid zygote and triploid (usually) endosperm nucleus. 花粉粒在柱头上萌发,双受精导致双倍体的合子和三倍体的胚乳形成。
- The majority embryo of seeds aborted at earlier stage could develop to earlier globular embryo phase due to the abnormal endosperm nucleus division. 与正常杂种相比,早期败育型杂种的初生胚乳核分裂出现异常,多数胚最终只能发育至球形早期;
- The development of the endosperm is of nuclear type.The division of primary endosperm nucleus is prior to that of zygote. 胚乳的发育属于核型,初生胚孔核的分裂远远早于受精卵的分裂。
- Double fertilization The fusion of one pollen nucleus with the egg to form the zygote and of the other pollen nucleus with a polar nucleus to form the triploid endosperm nucleus. 双受精:指花粉粒中的一个精子与胚珠中的卵细胞结合形成受精卵,另一个精核与极核结合形成三倍体的胚乳核。
- The endosperm development follows the Nuclear type and includes three successive stages, which are free endosperm nucleus stage, cellularization stage and mature stage. 胚乳发育类型为核型,包括游离核阶段、细胞化阶段和生长成熟阶段。
- The primary endosperm nucleus division was often prior to zygote, and it divided quickly.The endosperm cells surrounding the embryo were disintegrated during the development of embryo. 初生胚乳核先于合子分裂,胚乳细胞分裂较快,胚周围的胚乳细胞有降解现象。
- The development of endosperm was of Nuclear type.The primary endosperm nucleus division was often posterior to zygote, and its division speed was also slower than that of embryo cells. 胚乳发育属核型,初生胚乳核常常晚于合子分裂,胚乳核的分裂速度慢于胚体细胞的分裂速度。
- One fuses with the egg cell to form a zygote while the other either degenerates or, in certain angiosperms, fuses with the polar nuclei to give the primary endosperm nucleus. 一个与卵细胞结合形成受精卵,另一个要么退化,要么在某些被子植物中与极核结合形成初生胚乳核。
- several divisions of primary endosperm nucleus 初生胚乳核的几次分裂
- The endosperm is usually triploid and develops from the primary endosperm nucleus, the triploid nucleus resulting from the fusion of one of the male gametes from the pollen tube with the polar nuclei in the embryo sac. 胚乳通常是三倍体,由初生胚乳核发育而来,三倍体核来源于花粉管中的雄配子与胚囊中两个极核的融合。
- The fortress was the nucleus of the ancient city. 这城堡是这座古城的中心。
- The protoplasm outside the nucleus of a cell. 细胞质,细胞浆细胞分子外部的细胞质
- Zygote, in which the male and female nucleoli not fused yet, and primary endosperm nucleus already divided; 8.;受精卵,精、卵核核仁尚未融合,初生胚乳核已分裂形成胚乳核;
- These 1000 books will form the nucleus of the new school library. 这一千本书将构成学校新图书馆藏书的基础。
- The atomic center is the nucleus, and the electronics winds revolve it. 原子的中央是原子核,电子绕着它旋转。
- The endosperm development is of cellular type. 胚乳发育为细胞型。
- A proton or a neutron, especially as part of an atomic nucleus. 核子质子或中心,尤指作为原子核的一个组成部分
- The endosperm was the cellular endosperm. 胚乳为细胞型胚乳。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries