Washington, Oct 23 : Biologists have discovered a gene that has a critical role in the ‘double fertilization’ process in plants.
Scientists already knew that flowering plants, unlike animals require not one, but two sperm cells for successful fertilisation.
The mystery of this ‘double fertilization’ process was how each single pollen grain could produce ‘twin’ sperm cells.
One to join with the egg cell to produce the embryo, and the other to join with a second cell in the ovary to produce the endosperm, a nutrient-rich tissue, inside the seed.
Double fertilisation is essential for fertility and seed production in flowering plants so increased understanding of the process is important.