reproduction in flowering plants l.
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Reproduction in Flowering Plants. Mrs. Zemcik Living Environment. Flower. Sexual reproductive structure Produces egg and sperm Fertilization takes place inside the flower. Pistil *Stigma –top of the pistil, Sticky surface for pollen to stick to

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reproduction in flowering plants

Reproduction in Flowering Plants

Mrs. Zemcik

Living Environment

flower
Flower
  • Sexual reproductive structure
  • Produces egg and sperm
  • Fertilization takes place inside the flower
slide3
Pistil

*Stigma –top of the pistil,

Sticky surface for pollen to stick to

*Style – connects the stigma to the ovary

*Ovary –contains ovules

( eggs)

Stamen

*Anther –produces sperm nuclei by meiosis. Sperm nuclei are enclosed by pollen grains.

*Filament – holds the anther up

Female reproductive organ

Male reproductive organ

pollination
Pollination
  • Transfer of mature pollen grains from the anther to the stigma

-wind

-insects

-birds & other animals

slide6
When a pollen grain lands on the stigma, it germinates and a pollen tube grows down through the style to an ovule (egg)
fertilization
Fertilization
  • The sperm travels through the pollen tube to the ovule. The sperm & egg fuse forming the zygote (fertilized egg) –this grows into the plant embryo (cells grow by mitosis)
slide8
*Self pollination –pollen from same flower*Cross pollination – pollen from a different flower - more variation
slide9
The ovary and zygote (fertilized ovule) develop and ripen.

*The ovule forms the seed and the ovary forms the fruit.

  • A fruit is a ripened ovary
slide10
The plant embryo uses food stored in the cotyledon of the seed until it develops leaves for photosynthesis
slide11

Seedling

micropyle –opening in ovule where pollen tube attached, sperm enteredhilum –scar where ovule attached to ovaryradicle –embryonic root
slide12

Epicotyl – grows above the cotyledons and gives rise to the leaves.

Hypocotyl –below the point of attachment of the cotyledon, develops into the stem.

parts of a seed

Seed coat

Hypocotyl

Epicotyl

Cotyledons

Endosperm

Seed coat

Epicotyl

Hypocotyl

Cotyledon

Radicle

Parts of a seed
  • Dicot
  • Monocot
seed germination

Monocot

Dicot

Epigeous

Hypogeous

Radicle

Seed Germination
slide16

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