Sexual reproduction of flowering plants depends on the delivery of two immotile sperm cells to the female gametophyte（FG）,i.e.the embryo sac,through the growth of a pollen tube,a long cylindrical cellular extension ...Sexual reproduction of flowering plants depends on the delivery of two immotile sperm cells to the female gametophyte（FG）,i.e.the embryo sac,through the growth of a pollen tube,a long cylindrical cellular extension from a pollen grain.The journey of pollen tubes toward the embryo sacs is led by female cues,which guide the path of the pollen tubes.展开更多
文摘Sexual reproduction of flowering plants depends on the delivery of two immotile sperm cells to the female gametophyte（FG）,i.e.the embryo sac,through the growth of a pollen tube,a long cylindrical cellular extension from a pollen grain.The journey of pollen tubes toward the embryo sacs is led by female cues,which guide the path of the pollen tubes.
