| Popis: |
The crowns of trees of virginal and generative ontogenetic state of seven species of deciduous plants were studied: Ulmus glabra, Ulmus minor, Celtis sinensis, Zelkova carpinifolia, Aesculus hippocastanum, Fraxinus excelsior, in total more than 500 individuals. A crown of a tree consists of two principal morphofunctional parts: the “skeleton” and the “lace” of the crown. Their functions, appearance, development and time of existence in the crown are related to the geometric space of branches. The presence of these shoot complexes in the crown is based on different spatial and temporal principles. As a result of long-term observations, the types of primary and secondary “lace” of the crown have been identified, including two subgroups of the primary “lace”. The peculiarities of the development of tree branches in ontogenesis have been investigated. At the level of a tree as a whole, it is proposed to consider the entire complex of the crown “lace” as an example of the mathematical model “standing wave” (soliton). |
