Age-Related Variability of Generative Shoots Morphogenesis of Siberian Stone Pine

• Main Authors: Svetlana N. Velisevich, Sergey N. Goroshkevich
• Format: Article
• Language: English
• Published: Siberian Federal University 2011-03-01
• Series: Журнал Сибирского федерального университета: Серия Биология
• Subjects: Pinus sibirica Du Tour; shoot; organogenesis; growth; ontogenesis; Siberian stone pine
• Online Access: http://elib.sfu-kras.ru/bitstream/2311/2370/1/Velisevich.pdf

On the example of male and female shoots in young (140 years), middle-aged (235 years) and old (346 years) generative trees of Siberian stone pine (Ket-Chulym rivers, south-eastern part of Western Siberia) the effect of tree age on the ratio of vegetative and generative processes is studied. The traits characterizing vegetative development of generative shoots are reduced linear during the reproductive period of ontogenesis. The traits of the generative development of shoots and indirectly related vegetative traits reached maximum values in middle-aged trees. At the peak of reproduction increases the direct and indirect relationship between vegetative and generative traits of shoots: increased vegetative organogenesis in young trees has effected the cone initiation, reduced vegetative development in middle age has a positive effect on the cone formation and continuation this trend due to tree aging even strengthens this relationship. It is suggested that observed differences due to: (1) changing the balance between vegetative and generative organogenesis in the seasonal cycle of development of shoots and (2) ontogenetic changes in the root-leaf functional correlation.