Abstract
The paper deals with the introduction of genus Crataegus L. samples in Polar-Alpine Botanical Garden-Institute. The paper presents long-term periods of phenological phases onset of 14 Crataegus L. samples. Features of generative phenological development of 11 Crataegus L. samples are described. In the introduced Crataegus L. plants the time for the phenological phases passage depends on the origin and age. Adaptive advantages are plants of natural origin. This category of samples record phenophases of linear growth and lignifications of annual shoots which favorably affects the degree of adaptation. The phenophases onset of the majority of plants of the older and younger age groups is noted at close time. In plants of the older age group the phases of linear growth end and shoots lignifications are marked earlier than those of 18-19-year-olds. The indicators characterizing generative development (the duration of the prefloral period, flowering) are appropriate when assessing the adaptability of introduced plants. The majority of the samples are characterized by regular flowering and fruiting. The studied plants belong to the group with the average flowering onset. Short prefloral period contributes to early start and flowering end, earlier ripening of.
Highlights
It has been measured that the level of soil pollution by lactose positive intestinal protozoa depends on the period they have been in human use
Industrialized areas are characterized by the lowest level of lactose positive protozoa contamination which is explained by the fact that those industries use modern technologies which are able to minimize ecological risks
The paper deals with the introduction of genus Crataegus L. samples in Polar-Alpine Botanical GardenInstitute
Summary
Результаты интродукции представителей семейства Rosaceae Juss. достаточно широко освещены в научных публикациях. Коляда анализирует перспективность 14 видов североамериканских представителей семейства Rosaceae [2; 3]. Мифтахова представили результаты интродукции Розоцветных в Республике Коми [4]. Rosaceae в Якутии затронуты в работах Н.С. Фенологическому развитию боярышников посвящено достаточное количество работ [8,9,10,11,12,13,14]. Интродукция боярышников на Кольский Север исследована недостаточно. Некоторые вопросы развития и роста боярышников затронуты в работах сотрудников ПАБСИ [15; 16; 18]. Объекты исследования Характеристика исследуемых образцов Crataegus L. Объекты исследования Характеристика исследуемых образцов Crataegus L. представлена в табл. 1
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