1. Introduction to Plant Reproduction
Chapter 9 – Lesson 1

2. Introduction To Plant Reproduction
Sexual Reproduction
Asexual Reproduction
These processes occur in seed plants, and seedless plants.

3. Seed Plants
Seedless Plants

4. Types of Reproduction Sexual Reproduction
Requires the production of sex cells – sperm and egg – in reproductive organs.
Offspring produced are genetically different from either parent organism.
In some plants, water and wind help bring the sperm to the egg.
For other plants, animals such as insects help bring the sperm and egg together.

6. SexualReproduction (continued)
Reproductive Organs
Male reproductive organs produce sperm.
Female reproductive organs produce eggs.
If a plant has both organs it can reproduce by itself.
If organs are present on separate plants, sperm and egg must come together with the help of the elements.

7. Types of Reproduction (continued)
Asexual Reproduction
Does not involve or require the production of sex cells.
One organism produces offspring that are genetically identical to it.

8. Examples of Asexual Reproduction
Plants need to reproduce sexually in order to reproduce asexually…
Plantlet on Leaf
Strawberry Plant - Runner
Liverwart - Gemmae

9. Plant Life Cycle Two stages Plants have a two-stage life cycle.
The two stages are the gametophyte stage and the sporophyte stage.

10. Plant Life Cycle (continued)
Gametophyte Stage
During the gametophyte stage, gametes are produced.
Gametes are sex cells (sperm and egg).
The cells in this stage are haploid (n).

11. Gametophytes
Seed Plants
Seedless Plants

12. Plant Life Cycle (continued)
Sporophyte Stage
During the sporophyte stage, spores are produced.
The sporophyte structures have diploid (2n) cells, but produces spores that are haploid (n).

13. Sporophytes Seed Plants Seedless Plants
In flowering plants, the sporophyte comprises the whole multicellular body except the pollen and embryo sac
Seed Plants
Seedless Plants

14. Plant Life Cycle Diagram

15. Pollination and Seed Dispersal
Plant Earth
Pollination and Seed Dispersal