Composition of gum turpentines of pines. XVII. A report on Pinus montezumae from Chiapas and P. oocarpa var. trifoliata and P. durangensis from Durango, Mexico.
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The development of male generative organs of the Siberian stone pine clones of different origin was analyzed in the Krasnoyarsk forest-steppe for many years. Geographical and individual variability was described as concerns the number of microstrobils and pollen variability. The beginning of "flowering", abundance of microstrobils, and their regular formation were shown to markedly vary and, all other conditions being equal, be determined by the presence of clones, their hereditary features, and environmental conditions, as well by the influence of stock.
The patterns of protein biosynthesis in the embryo and endosperm during embryogenesis in the Scots pine were studied using electrophoresis and biochemistry methods. Proteins of the albumin-globulin fraction were visualized already at the early embryonic stages. The main polypeptide components (48-60, 37-39, and 20-22 kDa) were gradually accumulated in the course of maturation. A high synchrony was noted between the stages of embryogenesis and molecular events related to protein biosynthesis and accumulation in the developing seed.