Floral Development and Morphogenesis in Angiosperms

Floral development in angiosperms encompasses the transition from a vegetative shoot apical meristem to a determinate floral meristem, followed by the initiation, differentiation and spatial patterning of sepals, petals, stamens and carpels. Central to this process are gene regulatory networks that interpret positional cues through combinations of transcription factors, famously summarised in the ABC model of organ identity. Concurrently, gradients of plant hormones such as auxin and cytokinin regulate the establishment of floral organ primordia, while mechanical properties of cell walls and turgor pressures shape emerging structures. Phyllotactic patterns dictate organ arrangement, giving rise to radial or bilateral symmetry, and contribute to species-specific floral architectures. Morphogenetic events in the gynoecium, androecium and perianth illustrate the interplay of genetic determinants and biophysical forces, with heterochronic shifts in organ initiation driving diversity. Understanding these mechanisms has profound implications for crop improvement, pollination biology and conservation of biodiversity. Integrative research in evo-devo and functional genomics continues to reveal how alterations in developmental timing, gene expression domains and mechanical constraints yield the vast array of flower shapes and sizes observed across angiosperms.

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Floral Development and Morphogenesis in Angiosperms publication trend

The graph below shows the total number of articles in floral development and morphogenesis in angiosperms across all publications each year (not limited to Nature Index journals).

Technical terms

Meristem: A region of undifferentiated plant cells responsible for organ initiation and growth.

ABC model: A framework describing how combinations of three classes of homeotic genes specify floral organ identity.

Phyllotaxis: The spatial arrangement of floral or leaf primordia on a meristem.

Zygomorphy: Bilateral symmetry in a flower, where only one plane divides the structure into mirror images.

Actinomorphy: Radial symmetry in a flower, where multiple planes can divide the structure into mirror images.

Organ primordium: The initial cluster of cells that gives rise to a specific floral organ.

References

1. Organ symmetry establishment during gynoecium development. Current Opinion in Plant Biology (2025).
2. Delphinium as a model for development and evolution of complex zygomorphic flowers. Frontiers in Plant Science (2024).
3. Mechanical Forces in Floral Development. Plants (2022).