Vascular phyllotaxis transition and an evolutionary mechanism of phyllotaxis
Takuya Okabe
Abstract:Leaves of vascular plants are arranged regularly around stems, a phenomenon known as phyllotaxis. A constant angle between two successive leaves is called divergence angle. On the one side, the divergence angle α 0 of an initial pattern of leaf primordia at a shoot apex is most commonly an irrational number of about 137.5 degrees, called limit divergence. On the other side, the divergence α of a final pattern of leaf traces in the vascular system of a mature stem is expressed in terms of a sequence of rational… Show more
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