次生核

授粉后18h，精核附在极核或次生核的核膜上。

18 hours after pollination , sperm nucleus adheres to the nuclear membrane of polar nuclei or that of the secondary nucleus ;

10.授粉后20h，精核进入1个极核或次生核，二者进行融合。

10 . 20 hours after pollination , sperm nucleus enters one of the polar nuclei or the secondary nucleus and the triple fusion takes place .

约30～34h，次生核内出现分散的雄性染色质，随之出现雄性核仁；

In about 30 ~ 34 hours , it emerges male chromatin scattered , and a small male nucleolus appears .

授粉后16h，花粉管进入胚囊，破坏1个助细胞，并将内含物释放入该助细胞内。精子与次生核融合比与卵核的融合快。

16 hours after pollination , one sperm nucleus moves to egg and enters it . The fusion of a sperm nucleus with a polar nucleus is faster than that with an egg cell .

约26h，另一个精子的精核与次生核核膜相贴伏，随后与之融合；

In about 26 hours after pollination , the sperm nucleus of another sperm nestles on the nucleus membranes of the secondary nucleus , and then fuses with it .

二个极核受精前融合为次生核。

The two polar nuclei have fused into the secondary nucleus before fertilization .

另一个雄配子和次生核结合形成初生胚乳核。

The other male gamete fuses with the secondary nucleus , forming the primary endosperm nucleus .

精子与次生核的融合比与卵核的融合快。

The fusion of sperm nucleus with the polar nucleus is faster than that with the egg cell .

授粉后16~18h精核向极核或次生核移动。

16-18 hours after pollination , the sperm nucleus moves to the polar nuclei or the secondary nucleus .

极核融合为次生核，并位于卵细胞合点端附近；

Two polar nucleus fused into the secondary nucleus , and located near the chalazal end of egg cell ;

另一个精子与中央细胞的次生核融合形成初生胚乳核，初生胚乳核进一步发育成胚乳。

Another sperm fused with the secondary nucleus of a central cell to form a primary endosperm nucleus and then formed endosperm .

胚和胚乳可能分别起源于卵状反足细胞和次生核未受精的自发分裂。

The embryo and the endosperm maybe respectively originate from the egg-like antipodal cell , and secondary nucleus autonomously divided without pollination .

受精前二极核合并成次生核或不合并，位于卵细胞的合点端。

The pair polar nuclei lie in chalazal end to egg before fertilization , which fuse into a secondary nucleus or not ;

成熟胚囊中卵器发育正常并分化明显，两极核在胚囊发育后期融合为一次生核；

The development of egg apparatus are normally and differentiate clearly , the two polar nucleus of the central cell fused into a secondary nucleus lately .

胚囊内淀粉主要分布在次生核的周围以及它和卵细胞之间的细胞质中。

The starch grains in the embryo sac are chiefly distributed around the secondary nucleus and in the cytoplasm between the egg cell and the secondary nucleus .

授粉后60小时，另一个精核贴附在次生核的核膜上，随后与之融合。

About 60 HAP , the sperm nucleus of another sperm is nestles on the nucleus membranes of the secondary nucleus , and then fusing with it .

凤眼莲的胚乳发育属沼生目型，授粉后约19～21小时，另一精于与次生核融合形成游离核；

Solms conforms to the Helobial type , about 19 ~ 20 hours after pollination , the other sperm nucleus entered the secondary nucleus , and the free nuclei period began ;

次生核受精后，很快分裂产生胚乳游离核，到几十至数百个核时形成胚乳细胞。

After fertilization , the primary endosperm nucleus ( fertilized secondary nucleus ) begins to divide into endosperm free-nuclei , and then to form endosperm cells when some dozens to hundreds of free nuclei have reached .

次生极核于合点端受精后，逐渐分裂形成细胞。

After the newborn endosperm nuclei divided , the cells were formed step by step from the chalaza side to the micropyle side .

一个精子与卵细胞融合形成合子；另一个精子与次生极核融合形成初生胚乳核。（3）胚发育属茄型。

A sperm and egg cell fusion formation of homozygous ; another sperm and secondary Primary endosperm formation of a nuclear fusion . ( 3 ) The development of embryo belongs to solanad type .

在同源四倍体水稻与假稻的杂交中受精作用比较特殊，其中包括精细胞与卵细胞的单受精作用，也包括精细胞与次生极核的单受精作用，还包括正常的双受精作用。

The fertilization in the distant hybridization was very peculiar , including the single fertilization of a sperm with an egg , the single fertilization of a sperm with an secondary polar nucleus , and the normal double fertilization .