Life Cycle Of Flowering Plant

Life Cycle Of Flowering Plant

The flowering plants show two generations i.e. sporophyte and gametophyte, whichalternate with one another, during life cycle.A sporophyte is a dominant multicellular, diploid generation which is formed from zygote or fertilized egg. This generation produces spores (microspores and megaspores) by meiosis. The gametophyte is a small multicellular, haploid generation, which is formed from spores. The male gametophyte develops from microspore or pollen grain; and the female gametophyte develops from megaspore. The male and female gametophytes produce male and female gametes (sperms and egg) by mitosis. The gametophytes in flowering plants are short lived, much reduced and dependent for protection on sporophyte.

Double fertilization
The pollen tube grows via style through micropyle into the ovule.