Stigma style ovary ovule megasporocyte micropyle The carpel.

Presentation on theme: "Stigma style ovary ovule megasporocyte micropyle The carpel."— Presentation transcript:

1 stigma style ovary ovule megasporocyte micropyle The carpel

2 Megasporogenesis

3 megaspore Megasporogenesis

4 Megagametogenesis

5 antipodals Polar nuclei synergids Egg nucleus Megagametogenesis

6 antipodals Polar nuclei synergids Egg cell Mature female gametophyte = embryo sac

7 Review: Megasporocyte (2N) Megaspore (N) meiosis Megaspore (N) Megagametophyte (N) Mitosis and rearrangement Megagametophyte contains the egg cell

8 Stamen anther filament

9 Pollen sac Cross section of an anther microsporocyte

10 microsporogenesis microspore microsporocyte

11 microspore meiosis microsporogenesis Review: Next step: microgametogenesis

12 exine

13 Pollen grain Generative cell Tube cell nucleus

14 pollination

15 Tube nucleus Generative nucleus Pollen germination

16 Tube nucleus sperm

17 Tube nucleus Mature microgametophyte

18 Review: microsporocyte (2N) microspore (N) meiosis microspore (N) microgametophyte (N) Mitosis and rearrangement microgametophyte contains the sperm

19 antipodals Polar nuclei synergids Egg cell sperm Tube nucleus

20 antipodals Polar nuclei synergids Egg cell sperm Tube nucleus

21 Polar nuclei Egg cell 2N Zygote 3N Primary endosperm nucleus Double Fertilization

22 endosperm embryo Seed coat fruit