Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal. 2020. № 2(34). P. 1—10
03.00.00 BIOLOGICAL SCIENCES
UDC 630*17:582.475.2:630*232.318
Arefyev Stanislav Pavlovich, Doctor of Biological Sciences
Institute of North Development Problems, Tyumen Scientific Center, SB RAS Kazantseva Mariya Nikolaevna, Candidate of Biological Sciences
Institute of North Development Problems, Tyumen Scientific Center, SB RAS Popov Petr Petrovich, Doctor of Biological Sciences
Institute of North Development Problems, Tyumen Scientific Center, SB RAS
INDIVIDUAL VARIABILITY OF CONES AND SEEDS OF SIBERIAN SPRUCE ON THE NORTHERN BORDER OF ITS DISTRIBUTION RANGE IN THE YAMAL-NENETS AUTONOMOUS DISTRICT
Abstract
For the first time, the reproductive characteristics of spruce (Picea obovata Ledeb.) were studied on the northern border of its range in the Yamalo-Nenets Autonomous District near the village Yar-Sale in the year of a high cone crop for the region (2019). The spruce here forms very small cones (32—55 mm), and the individual variability of their length is relatively small (12%). The number of full seeds in cones is very small (up to 7 pcs.), this indicator is characterized by high variability, in 18% of the trees there are no seeds in cones at all. The weight of 1 seed is 3—6 (7) mg, the proportion of small (light) seeds (3—4 mg) — 77%, and heavy (5 mg or more) — 23%. In terms of germination (with daily accounting) and seed viability, there is a large individual variability. Spruce seed distribution from the area of the village Yar-Sale in terms of mass and time (days) of germination is characterized by a pronounced positive asymmetry. The low rates of germination and viability of spruce seeds at the northern limit are undoubtedly due to the extreme conditions of the growth and reproduction of this species. Despite the low sowing quality of seeds, they are of great value for the reproduction of the species. The large individual variability of the local spruce in the quantity and quality of the seeds produced makes it possible to individually select trees as seed for forestry.
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Bibliography link to this article:
Arefyev S. P., Kazantseva M. N., Popov P. P. Individual variability of cones and seeds of Siberian spruce on the northern border of its distribution range in the Yamal-Nenets Autonomous District. Vestnik of Orenburg State Pedagogical University. Electronic Scientific Journal, 2020, no. 2 (34), pp. 1—10. DOI: https://doi.org/10.32516/2303-9922.2020.34.1.