1. Background Introduction By Bensen Fan Kristin Gill Maria Garcia

2. Part I. Seed Development By Bensen Fan

3. Seed Anatomy Cotyledon Axis

4. Flower Anatomy Pistil Anthers (Makes Pollens) Ovary (Contains ovules) Stigma

5. Pollination & Fertilization: Forming of a New Life! Sperms Pollen Tube

6. Embryo Development: Zygote - Young Embryo Asymmetric Division Apical Cell Basal Cell Embryo Proper Suspensor Terminally Differentiated

7. Late Development: Torpedo - Mature Embryo SM = Shoot Meristem; RM = Root Meristem

8. Final Stage: Dormancy Mature Seeds Dormant Seeds

9. Germination: Beginning of a New Cycle…

11. Part II. Arabidopsis thaliana Embryo Development By Kristin Grill

12. What is the life cycle of an Arabidopsis plant?

13. What happens during embryo development? Each stage is essential for embryo development! EMBRYO SACGLOBULARHEARTTORPED O MATURATION

14. Embryos develop after double fertilization Early embryos consist of 2 regions: 1. Embryo Proper 2. Suspensor Globular Embryo Embryo Proper Suspensor

15. Early embryo development is a very coordinated developmental process Embryo Sac Egg Cell Central Cell Synergids 2-Cell Embryo Apical cell Basal cell Globular Embryo Embryo Proper Suspensor

16. The parts of a globular embryo undergo different fates Globular Embryo Embryo Proper Suspensor Mature Embryo Differentiated Organ Mature Arabidopsis Plant

17. Late embryo development… consists of cotyledon and axis development! 2 cotyledons Heart Stage Torpedo Stage

18. Mature Embryo Consists of: 1.Cotyledons 2.Axis - contains the shoot and root meristems

19. Part III: Why is Arabidopsis Thaliana a model plant? By Maria Garcia

20. Here’s Why Arabidopsis Thaliana is convenient. It has a: Fast generation time Small genome Large mutant collections Large scientific community working on all aspects of plant biology

21. How fast does it grow? Short non-seasonal generation time Grows all year 4 to 8 weeks from a seed to a mature plant

22. How small is it? Arabidopsis has a small genome 120Mb (25,000 genes- same as humans!) Arabidopsis genome was sequenced in the year 2000

23. Easy to Manipulate Large mutant collections Chemical Insertional Knock-Out! Easily manipulated Genetically tractable

24. Everyone is in on it Large scientific community working on all aspects of plant biology Many resources on this plant already Much is already known about this plant