polar nucleus meaning in Chinese
极核
Examples
- In flowering plants the endosperm tissue is usually triploid , resulting from the fusion of one of the pollen nuclei with the two polar nuclei
在开花植物中,胚乳组织多为三倍体,由一个花粉核和两个极核融合产生。 - 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。 - 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 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。