Influence of temperature on germination of the seeds of herbaceous plants in Central Yakutia
https://doi.org/10.31242/2618-9712-2021-26-1-10
Abstract
The influence of different temperature conditions on the germination of seeds of 20 species of perennial herbaceous plants in Central Yakutia was studied. The seeds of 8 species of Aconitum kusnezoffii Reichb., Actaea erythrocarpa Fisch., Adonis sibirica Patrin, Anemonidium dichotomum (L.) Holub., Heracleum dissectum Ledeb., Iris laevigata Fisch. et C.A. Mey., Trollius sibiricus Schipcz., Thalictrum minus L. do not germinate in the temperature range from 5 to 35 °C; among them, there are the species of forest and meadow vegetation belonging to Ranunculaceae family. The species were divided into 2 groups according to the demand for heat at the time of germination: plant seeds starting to germinate at 5 °C, and plant seeds starting to germinate at 10 °C. The temperature range of seed germination for the studied species is wide. For the majority of steppe and meadow species, it ranges from 5 to 35 °C, while for forest and coastalwater species – from 10 to 35 °С. The ranges of optimal temperatures for seed germination are diverse. The narrowest optimum range is typical for the seeds of forest plants; in each of them, the optimum temperature regime is specific. The widest range of optimum temperatures is characteristic of the seeds of meadow Acetosa thyrsiflora – from 10 to 25 °С. For the seeds of all the studied steppe species, the optimum lies within the range of 20–25 °С, while there are two optimal temperature points for the coastal-water Rumex aquaticus: 20 and 35 °С. At low (5 °С) and high (35 °С) temperatures, the germination of the seeds of the studied species becomes difficult; the delay in germination under these conditions is a tool protecting the seeds of Yakut plants from untimely germination in late autumn before the harsh winter or in dry summer months, during the period of acute moisture deficit, which is typical for Central Yakutia.
Keywords
germination capacity,
seed germination,
minimum,
maximum and optimal temperature regime of seed germination
Supporting agencies: The work was carried out within the framework of the State Assignment to the IBPC SB RAS under the Project «Vegetation cover of the cryolithozone of taiga in Yakutia: biodiversity, environmental functions, protection and rational use» (0297-2021-0023; reg. number AAAA21- 121012190038-0).
About the Authors
D. N. Androsova
Institute for Biological Problems of Cryolithozone of the Siberian Branch of RAS
Russian Federation
Russian Federation
ANDROSOVA Darija Nikolaevna, junior researcher
41 Lenina pr., Yakutsk 677000
N. S. Danilova
Institute for Biological Problems of Cryolithozone of the Siberian Branch of RAS
Russian Federation
Russian Federation
DANILOVA Nadezhda Sofronovna, chief researcher, Dr. Sci. (Biology), professor
41 Lenina pr., Yakutsk 677000
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Review
For citations:
Androsova D.N., Danilova N.S. Influence of temperature on germination of the seeds of herbaceous plants in Central Yakutia. Arctic and Subarctic Natural Resources. 2021;26(1):107-115. (In Russ.) https://doi.org/10.31242/2618-9712-2021-26-1-10
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