Question

what do you mean by triple fusion in plant..?

Answer 1

triple fusion

: the fusion involving two polar nuclei and a sperm nucleus that occurs in double fertilization in a seed plant and results in the formation of the endosperm

hope it helps you...

Answer 2

in plants pollination is followed by fertilization.The pollen lands on the stigma ,germinates and gives out a pollen tube.
The male gamete divides into 2 and both the nuclei move into the pollen tube .The pollen tube grows throught the style .ovary and reaches the ovule.
The ovule contains the embryo sac which consists of the egg cell (female gamete) ,the 2 nuclei are released into the embryo sac .One of them fuses with the egg cell and this is called syngamy .The product of syngamy is the zygote.The other male gamete fuses with 2 polar nuclei in the embryo sac .This is called triple fusion because 3 nuclei are taking part in fusion(2 polar nuclei and one male gamete).