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Université de Fribourg

Regulation of phyllotaxis

Reinhardt, Didier

In: International Journal of Developmental Biology, 2005, vol. 49, p. 539

Plant architecture is characterized by a high degree of regularity. Leaves, flowers and floral organs are arranged in regular patterns, a phenomenon referred to as phyllotaxis. Regular phyllotaxis is found in virtually all higher plants, from mosses, over ferns, to gymnosperms and angiosperms. Due to its remarkable precision, its beauty and its accessibility, phyllotaxis has for centuries been...

Université de Fribourg

Microsurgical and laser ablation analysis of leaf positioning and dorsoventral patterning in tomato

Reinhardt, Didier ; Frenz, Martin ; Mandel, Therese ; Kuhlemeier, Cris

In: Development, 2005, vol. 132, p. 15

Leaves are arranged according to regular patterns, a phenomenon referred to as phyllotaxis. Important determinants of phyllotaxis are the divergence angle between successive leaves, and the size of the leaves relative to the shoot axis. Young leaf primordia are thought to provide positional information to the meristem, thereby influencing the positioning of new primordia and hence the divergence...