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Background Introduction

Background Introduction. By Bensen Fan Kristin Gill Maria Garcia. Part I. Seed Development. By Bensen Fan. Seed Anatomy. Axis. Cotyledon. Flower Anatomy. Anthers (Makes Pollens). Stigma. Ovary (Contains ovules). Pistil.

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Background Introduction

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Presentation Transcript

  1. Background Introduction By Bensen Fan Kristin Gill Maria Garcia

  2. Part I. Seed Development By Bensen Fan

  3. Seed Anatomy Axis Cotyledon

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

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

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

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

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

  12. What happens during embryo development? Each stage is essential for embryo development! EMBRYO SAC GLOBULAR HEART TORPEDO MATURATION

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

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

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

  16. Late embryo development… Heart Stage TorpedoStage consists of cotyledon and axis development! 2 cotyledons

  17. Mature Embryo Consists of: Cotyledons Axis - contains the shoot and root meristems

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

  19. 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

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

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

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

  23. 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

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