Journal of Siberian Federal University. Biology / Aspects of Crataegus maximowiczii C. K. Schneid Development on the Introduction above the Arctic Circle

Full text (.pdf)
Journal of Siberian Federal University. Biology. 2023 16 (1)
Zotova, Olesya E.; Goncharova, Oxana A.
Contact information
Zotova, Olesya E.: Polar-Alpine Botanical Garden-Institute of the Kola Science Center RAS Apatity, Russian Federation; ; ORCID: 0000-0003-4986-606X; Goncharova, Oxana A.: Polar-Alpine Botanical Garden-Institute of the Kola Science Center RAS Apatity, Russian Federation; ORCID: 0000-0002-8881-8522
phenological phases; flowering; fruit-to- flower ratio; seed weight; pre-sowing treatment; Subarctic

This study aims to assess the developmental characteristics of Crataegus maximowczii C. K. Schneid on its introduction to the Kola Peninsula. Introduction of new plants aims to offer a range of highly ornamental trees and shrubs for municipal landscaping. Extending lists of highly viable and decorative plants that are suitable for landscaping has always been important. The paper describes the timing of phenological phases, morphometric parameters of inflorescences and fruits, as well as seed propagation under polar conditions. Phenological observations of plants were performed 2–3 times a week during the growing season. Morphometric characteristics of inflorescences were examined during the period of mass flowering of each specimen. The inflorescence density was determined as the ratio of the number of flowers in an inflorescence to its width, the fruit-to- flower ratio was determined as the percentage of full fruit number to the number of buds. A hundred seeds of each specimen were collected, and individual weight of each seed was determined using the analytical balance. Pre-sowing treatment included cold stratification or scarification followed by two-stage stratification. Crataegus maximowiczii has a short shoot growth period, short pre-floral period, annual flowering and fruiting. Flowering phases were first observed at the age of 8 years. Flowering and fruiting phases occurred annually; the abundance of flowering and fruiting was given 4–5 points on the five-point V. G. Kapper scale. The pre- floral period was of medium duration and lasted on average for 37 days. Fruit ripening occurred in September. The most stable parameter of the examined specimens was the number of flowers per inflorescence, while the number of fruits and, consequently, the fruit-to- flower ratio were more dependent on external conditions. Morphometric characteristics of inflorescences were species-specific. Average weight samples subjected to combined pre-sowing treatment had the highest germination rate

Paper at repository of SibFU

Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).