Fruit growth and ripening Pollination and fertilization Fruit development Auxin with fruit development Seedless fruit Pollination: Transfer of the pollen grain from an anther to a stigma Pollen grain Stigma Style Ovary Pollination in plant by animal Fertilization A sperm and one egg actually unite to form a diploid zygote Pollen tube Tube cell nucleus Double fertilization sperm Primay endosperm nucleus (3n) Style synergid micropyle Zygote (2n) no pollination + water (Control) no pollination + 10-6 IAA Development of fruit Fruit = mature ovary with seed (3) (1) (2) Development of fruit Fruit = mature ovary with seed (3) (1) (2) Fruit structure seed simple fruit pericarp Multiple fruit Aggregate fruit Seedless fruits Parthenocarpy: fruit develops without fertilization Stenospermocarpy: seeds are actually aborted while still small