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Modeling physical pressure in floral development
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PRE
AI
DOI：10.1080/23818107.2026.2673404.png)
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Abstract
En 中文
Recent studies have qualitatively inferred pressure forces within inflorescences and flowers from the deformation patterns observed in floral meristems. Here, we aim to develop a quantitative biophysical model to better characterize these pressures. Our phyllotaxis-based model enables the assignment of numerical values to mechanical forces according to the spatial arrangement of neighboring organs, including bracts, bracteoles, and adjacent floral meristems within inflorescences. We parameterized the model across a range of species representing diverse angiosperm families. These include Portulacineae, whose flowers are laterally compressed by two opposing involucral bracts, and Sapindaceae, in which the genus Acer exhibits remarkable diversity in inflorescence architecture, from simple decussate botryoids to complex abracteolate cincinni. In the Faboideae, Astragalus compactus illustrates how a zygomorphic Bauplan can be mechanically deformed by pressure exerted by a subtending leaf. Overall, the model successfully simulates the mechanical pressures inferred from nearly all developmental biology studies addressing this phenomenon.
Keywords:
Phyllotaxis
physical pressure
inflorescence
rheological model
calyx aestivation
Journal
B
IF:
1.3
Papers:
44
Citations:
0