Abstract
The article presents research of Myricaria bracteata shrub ontogenesis and architecture under East Kazakhstan conditions. The study revealed that the specimen ontogenesis is complete and includes two phases of development: a primary shoot and a primary bush. The adult speciment structure is built due to consistent development of perennial orthotropic/skewed orthotropic skeletal axes was forming from the resting buds. Annually dying lateral vegetative and generative shoots are formed of branching resting buds located on these axes. The architectural unit of M. bracteata consists of 5 categories of axes: 1 – perennial orthotropic, 2 – perennial lateral skewed orthotropic, 3 – annual lateral generative bracteose, 4 – annual lateral generative frondose, 5 – annual lateral vegetative ones.
Highlights
Myricaria bracteata Royle is a fluviaphyte [1] which is a pioneer vegetation compound at the succession initial stages of river sand floodplains and pebble overgrowing [2]
The typical habitats of M. bracteata are confined to stony-sandy banks of mountain rivers, pebbles, dried mountain stream and river beds
The field research was carried on in East Kazakhstan, the material was collected on the Kokterek River pebble stones of the Tarbagatai ridge southern macroslope
Summary
Myricaria bracteata Royle is a fluviaphyte [1] which is a pioneer vegetation compound at the succession initial stages of river sand floodplains and pebble overgrowing [2]. Investigations of ontogenesis and growth form make it possible to identify mechanisms of speciment morphological adaptation and their stable existence in changing environment [3]. Structural analysis allows determining the polymerization degree and sprout system hierarchical subordination in a general plant design, which is of great importance in studying evolution of the life form architecture [4]. Pioneer shrubs having deterministic growth of monopodial axes with lateral inflorescences are not practically researched in this attitude. The work objective is to study M. bracteata ontomorphogenesis and architectural organization under East Kazakhstan conditions
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