Sexual Plant Reproduction

• Sexual reproduction in plants Involves the fusion of sex cells from parent plants
• The other term for flowering plants is angiosperm
• Pollen grains are male gametophyte which develop from microspore.
• Sexual reproduction in flowering plants involves the fusion of sex cells from parent plants
• Embryo sac is the female gametophyte which develops from a megaspore.
• male reproductive part

  stamen
• makes tiny grains called pollen, which contain male sex cell

  anther
• holds up the anther

  filament
• female reproductive part

  carpel or pistil
• top part of the carpel with sticky surface to trap pollen

  stigma
• joins the stigma and the ovary

  style
• contains the female sex cells called ovules

  ovary
• What stage of sexual reproduction is this? Anther contains pollen sacs which contains microspores

  Pollen and Egg Formation
• What stage of sexual reproduction is this? Microspores undergo meiosis resulting to formation of pollen grains

  Pollen and Egg Formation
• What stage of sexual reproduction is this? Egg cells are formed in the ovule of the flower

  Pollen and Egg Formation
• This is the transfer of pollen grains from the stamen to the stigma

  Pollination
• pollen is carried from the stamen to the stigma of the same plant

  self-pollination
• pollen carried to the stigma of another plant

  cross-pollination
• The tip of pollen tube bursts to release 2 sperms cells which migrates down the pollen tube

  Fertilization
• One the sperm cell fertilizes and egg cell forming zygote

  fertilization
• After fertilization, the zygote’s cells will undergo further mitotic divisions
• Ovary swells up and ripens to form a fruit, which may contain one or may seeds
• Seeds together with its fruit are sometimes carried away from the parent plant in the process called dispersal

  Seed dispersion
• Methods of dispersing seeds: by wind, water, animal, or explosion
• The process in which a new plant grows from the seed

  Germination
• Ultimately when seed, sometimes with its fruit, land on the ground, it breaks through the seed coat and grow.

  Germination