2026-10-11T22:10:18Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33826572 2026-09-15T23:05:29Z category_1 category_915 category_15 category_16 category_873 category_39 category_734 category_61 category_69 portal_63 item_type_2 month_year_09_2026

Curved Reaction–Diffusion Fronts Generate Quasi-Symmetric Phyllotaxis in a Chemical Turing System Panna Farkas (24958914) István Szalai (1521034) Biophysics Physical Sciences not elsewhere classified Neuroscience Physiology Chemical Sciences not elsewhere classified Ecology Biological Sciences not elsewhere classified Developmental Biology Inorganic Chemistry uncovering general principles locally hexagonal rows frequently smaller offsets symmetric parastichy families expansion maintains near wavelength row offsets intrinsic spatial wavelength localized spot formation generate phyllotactic patterns spot formation radial expansion natural patterns phyllotactic structures symmetric phyllotaxis scaling form results establish radial growth radial contraction propagating front prominent example preserving form experimental link dependent subtypes demonstrated experimentally contraction produces Chemical systems provide controllable platforms for uncovering general principles of self-organization. Phyllotactic structures are a prominent example of natural patterns, arising when radial growth is coupled to spot formation with an intrinsic spatial wavelength. Although Turing reaction–diffusion models can generate phyllotactic patterns, this connection has not been demonstrated experimentally in an established chemical Turing system. Here we show that a propagating front in the chlorine dioxide–iodine–malonic acid reaction converts front-localized spot formation into phyllotactic organization. A planar front produces staggered, locally hexagonal rows, whereas curved fronts organize successive rows into paired, quasi-symmetric parastichy families. The experiments reveal two geometry-dependent subtypes: a radius-scaling form during radial expansion and a wavelength-preserving form during radial contraction. Expansion maintains near-half-wavelength row offsets; contraction produces more variable, frequently smaller offsets. These results establish an experimental link between chemical Turing pattern formation and phyllotaxis. 2026-09-15T00:00:00Z Dataset Media 10.1021/acs.jpclett.6c02604.s002 https://figshare.com/articles/media/Curved_Reaction_Diffusion_Fronts_Generate_Quasi-Symmetric_Phyllotaxis_in_a_Chemical_Turing_System/33826572 CC BY-NC 4.0