Early stages of Pinus sibirica (Pinaceae) ontogenesis in the subzone of Middle Taiga.

摘要

The morphological and spatial structure and quantitative characteristics of growth and development are determined for the Siberian stone pine (Pinus sibirica) seedlings in Russia. Temporal boundaries and duration of postembryonic development stagesand phases are refined. The prejuvenile stage includes three phases (seed germination, germ and plantlet), and the juvenile stage includes three phases (1-year's seedling, many-year's seedling, seedling with irregular formation of lateral shoots). The beginning of regular formation of the lateral shoots indicates changing to the immature stage.