THE PHYSIOLOGICAL BASIS OF PATTERN GENERATION IN THE SUNFLOWER

The following sections are included:

• Introduction

• Formation of the Receptacle

  • Origin

  • Maintenance of Symmetry in the Generative Area

• Floret Production

• Fibonacci Prevalence in Floret Row Numbers

• Wound-Induced Florets

• Initiation of Floret and Floret Bract Primordia

  • Polarity Change in the Generative Area

  • Surface Buckling as an Alternative Physical Theory

  • Chemical Inhibition of Floret Production

• Cytokinin Promotion of Floret Production

  • Response to Cytokinins

  • Response of the Dome to Cytokinin

• Non-Cytokinin Growth Regulators

• Mutant with Irregular Floret Patterning

• Conclusions

• References