Double fertilization is a specific characteristic of angiosperms,in which two sperm cells fuse with the egg and central cell respectively[1].Different from that of animals,the two sperm cells of angiosperms have lost ...Double fertilization is a specific characteristic of angiosperms,in which two sperm cells fuse with the egg and central cell respectively[1].Different from that of animals,the two sperm cells of angiosperms have lost their motility.Therefore,to fulfill the double fertilization,the two immobile sperm cells have to be sent to the female games by a specific structure,the pollen tube.Upon landing on the stigma of the pistil,the pollen grain germinates and devel-展开更多
文摘Double fertilization is a specific characteristic of angiosperms,in which two sperm cells fuse with the egg and central cell respectively[1].Different from that of animals,the two sperm cells of angiosperms have lost their motility.Therefore,to fulfill the double fertilization,the two immobile sperm cells have to be sent to the female games by a specific structure,the pollen tube.Upon landing on the stigma of the pistil,the pollen grain germinates and devel-
