How did flowers and fruits assume their familiar appearance?
The Origin of the archetypal flower and fruit form in self-organized patterns in the ancestral germ plasm
When your finger indents a balloon or a pillow, a symmetrical radial pattern immediately emerges on itssurface. A similar pattern emerges when you turn the sleeve of a coat inside out. A similar topological phenomenon is proposed as the developmental and evolutionary origin of the radial symmetry found invirtually all extant plant forms.
The precursor of the plant seed is the germ plasm, a single amoeboid cell, consisting of a protoplasm-filled membrane. During amoeboid cell locomotion, the membrane enter
|Figure 1. Flower morphogenesis from primordial germ plasm to flower and fruit. a. Germ plasm; b-d. Axial extension; e-g. Roots/shoot differentiation; h-m. Flower/fruit development.|