Fertilization of plants with flowers is unique because, unlike all other organisms, in their case is realized simultaneous fertilization of two cells by a process called double fertilization. The only exception is the plants included in the genus Ephedra in which case the second fertilization and their development stops and degenerates.At angiospermous, fecundation takes place after wind, water or insects pollination. The grain of pollen, reached on stigma, germinates forming a police tube.
Through this tube enters the two male gametes, coming from mitotic division of the kernel which generated pollen grain.
Spermatic kernel fertilizes female gametes and form egg cell. The second spermatic core fertilizes the secondary nucleus of theembryo bag, resulting albumen, with nutritional role for the embryo.
After double fertilization, follows the process that will lead to transformation of ovule in seeds and the ovary in fruit.
The process of double fertilization has contributed immensely to the success of organic plants with flowers, by accelerating the growth and increasing chances of survival in vulnerable stages.
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