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Lecture 3: Embryogenesis and Meristems

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Lecture 3: Embryogenesis and Meristems

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    1. 1 Lecture 3: Embryogenesis and Meristems Definitions Stages of embryo development Genes required in embryogenesis Meristems: root apical meristem shoot apical meristem Formation and maintenance of apical meristem Signal transduction in apical meristem

    2. 2 Motivation

    3. 3 Embryogenesis

    4. 4 Embryogenesis establishes essential features of a mature plant

    5. 5 Meristems in plant development

    6. 6 Stages of Arabidopsis embryo development

    7. 7 Stages of embryogenesis - Arabidopsis embryogenesis is characterized by a precise pattern of cell division

    8. 8 The axial pattern of the embryo is established during the first cell division of the zygote

    9. 9 Postembryonic development of Arabidopsis

    10. 10 Embryogenesis requires specific gene expression

    11. 11 Mutants of the root meristem

    12. 12 SCR and SHR control tissue patterning during root development

    13. 13 SCR and SHR control tissue patterning during root development

    14. 14 Root apical meristem (RAM) - Root development

    15. 15 Root apical meristem - Root development

    16. 16 Model of lateral root formation

    17. 17 Shoot apical meristem (SAM)

    18. 18 SAM forms where auxin is low

    19. 19 Genes required for formation and maintenance of apical meristem in Arabidopsis

    20. 20 Genes required for formation and maintenance of apical meristem in Arabidopsis

    21. 21 WUSCHEL and SHOOTMERISTEMLESS play complementary roles in maintaining the shoot meristem

    22. 22 How is the size of the apical meristem constrained?

    23. 23 CLAVATA genes

    24. 24 Model of the CLV1/2 receptor kinase signaling cascade – Stem cell regulation

    25. 25 Maintenance of stem cells in the vegetative and inflorescence meristems involves an autofeedback loop

    26. 26 Summary

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