Double fertilisation is a complex fertilisation mechanism of flowering plants (angiosperms).This process involoves the joining of a female gametophyte (megagametophyte this is also called the embryo sac) with two male gametes (sperms).
Define double fertilisation?
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define double fertilisation
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When the pollen grains enters the embryo sac through the micropyle they fuse with the germ cell as well as the secondary nucleus this fusion with both the cells are termed as double fertilisation.
Fertilisation is the process of fussion of male and female gametes. In plants transfer of pollen grains from stigma to ovary. For this to happen a tube grows out of the pollen grain. The pollen travels through this tube through the style to reach ovary. The pollen tube enters the ovary through an opening called micropyle. Here it releases\xa02 male gametes in the embryo sac in which one male gamete fuses with one female gamete. This is known as syngamy. The other male gamete fuses with two other polar nuclei. This is known as triple fusion. Syngamy along with triple fusion is defined as double fusion.
Define double fertilisation ?
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Double fertilization is a complex process which involves the fusion of one female gametophyte with two male gametes.Double fertilization is a major characteristic of flowering plants. In this process, two male gametes fuse with one female gamete wherein one male gamete fertilizes the egg to form a zygote, whereas the other fuses with two polar nuclei to form an endosperm.Double fertilization gives stimulus to the plant that results in the development of the ovary into fruit and ovules into seed. The fusion of haploid male and female gametes restores the diploid condition of the plant.
It is very complex fertilization mechanism of flowering plants in which joining of two females embryo with two male gametes