Fertilization characteristic of seed plants in which one sperm nucleus fuses with the egg nucleus to form an embryo and another fuses with polar nuclei to form endosperm.
Definition of DOUBLE FERTILIZATION. : fertilization characteristic of seed plants in which one sperm nucleus fuses with the egg nucleus to form an embryo and another fuses with polar nuclei to form endosperm. ADVERTISEMENT. Britannica.com: Encyclopedia article about double fertilization. : fertilization characteristic of seed plants in which one sperm nucleus fuses with the egg nucleus to form an embryo and another fuses with polar nuclei to form endosperm. ADVERTISEMENT. Britannica.com: Encyclopedia article about double fertilization. n. The union in flowering plants of two sperm nuclei with three nuclei in the embryo sac. One sperm nucleus unites with the egg to form a diploid zygote, and the other unites with two polar nuclei to form the triploid, primary endosperm nucleus.  double fertilization A character istic of angiosperm s in which a pollen tube carries two sperm cells to the female gametophyte in the ovule. A mechanism of fertilization in angiosperm s, in which two sperm cells unite with two cells in the embryo sac to form the zygote and endosperm. double helix ... Double fertilization gives rise to Sperm Cells. Sperm cells begin as a grain of pollen. Each pollen grain is the source of a pollen tube and a haploid sperm nucleus. The pollen tube is generated first to allow the sperm cell to travel to the ova. In the process, the sperm nuclei divides through mitosis to become two haploid sperm. The process of double fertilization is common to all angiosperms as well as a few of the gymnosperms, or plants that produce seeds not enclosed in an ovary. Other People Are Reading. 1. It is union of one male gamete with egg and the other male gamete with secondary nucleus of the same embryo sac. 2. It is restricted to angiosperms only. Advertisements: 3. Double fertilization produces a diploid zygote and a triploid primary endosperm cell.  Angiosperms are flowering plants that produce seeds enclosed within an ovary structure, or fruit. The process of double fertilization is common to all angiosperms as well as a few of the gymnosperms, or plants that produce seeds not enclosed in an ovary. Other People Are Reading. a sexual process in angio-spermous plants, in which both the egg cell and the central cell of the embryo sac are fertilized. Double fertilization was discovered by the Russian scientist S. G. Navashin in 1898 in two species of plants—the lily Lilium martagon and the fritillaria Fritillaria orientalis. Both of the sperms brought into the embryo sac through the pollen tube participate in double fertilization.  Double fertilization. The pollen tube enters the ovule through the micropyle and ruptures. double fertilization A character istic of angiosperm s in which a pollen tube carries two sperm cells to the female gametophyte in the ovule. double fertilization. A mechanism of fertilization in angiosperm s, in which two sperm cells unite with two cells in the embryo sac to form the zygote and endosperm. double helix ... Double fertilization gives rise to the zygote and endosperm. After landing on a receptive stigma, the pollen grain absorbs moisture and germinates, producing a pollen tube that extends down the style toward the ovary Significance of double fertilization is as follows: 1  It gives stimulus to the plant due to which ovary develops into fruit and ovules develop into seeds. 
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what is double fertilization