Antimicrobial and Antiradical Activities of Individual Fractions of Pinus sibirica Du Tour and Abies sibirica Ledeb. Growing in Siberia

2021 ◽  
Vol 47 (7) ◽  
pp. 1439-1444
Author(s):  
A. A. Efremov ◽  
I. D. Zykova ◽  
V. A. Senashova ◽  
I. D. Grodnitckaya ◽  
N. V. Pashenova
Keyword(s):  
Pinus Sibirica ◽  
Abies Sibirica ◽  
Pinus Sibirica Du Tour

scholarly journals ANTIMICROBIAL AND ANTIRADICAL ACTIVITY OF INDIVIDUAL FRACTIONS OF PINUS SIBIRICA DU TOUR AND ABIES SIBIRICA LEDEB., NATIVE TO THE SIBERIAN REGION

2020 ◽  
pp. 203-210
Author(s):  
Aleksandr Alekseyevich Efremov ◽  
Irina Dement'yevna Zykova ◽  
Vera Aleksandrovna Senashova ◽  
Irina Dmitriyevna Grodnickaya ◽  
Natal'ya Veniaminovna Pashenova
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Essential Oil ◽  
Essential Oils ◽  
Antiradical Activity ◽  
Micrococcus Luteus ◽  
Pinus Sibirica ◽  
Acinetobacter Baumanii ◽  
Abies Sibirica ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine

By the method of exhaustive hydroparodistillation, essential oil was obtained from Siberian pine (Pinus sibirica Du Tour) and Siberian fir (Abies sibirica Ledeb.), growing on the territory of the Krasnoyarsk territory. Separate fractions of oil were obtained: the first one after 45 min from the beginning of distillation, the second – after 2 hours, the third – after 5 hours, the fourth-after 10 hours, the fifth fraction was collected after the end of hydrodistillation. The antimicrobial activity of separate fractions of essential oil of P. sibirica and A. sibirica was studied against strains of opportunistic microorganisms: Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Staphylococcus aureus 209p, Micrococcus luteus, Acinetobacter baumanii, Candida albicans. The performed studies showed that all the studied samples of essential oils showed either bactericidal or bacteriostatic activity against the strains of microorganisms taken in the experiment, except Pseudomonas aeruginosa. The type of activity displayed depended on the type of strain and sample of essential oil. It is noted that the sensitivity of the experimental strains to the components of the essential oils of P. sibirica and A. sibirica decreases during the transition from the first to the last fraction. We assume that, apparently, this is due to a decrease in the number of monoterpenes in the composition of oils.To study the antiradical activity, the reaction of essential oil components with a stable free 2,2-diphenyl-1-picrylhydrazyl radical was used. Antiradical activity of both whole essential oils of P. sibirica and A. sibirica and their separate fractions was established. There was an increase in antiradical activity with a decrease in the content of monoterpenes in the composition of essential oil.

scholarly journals Influence of essential oils and polyhexamethyleneguanidine on black yeast-like fungi Exophiala alcalophila

2014 ◽  
Vol 68 (3) ◽  
pp. 75-79 ◽  
Author(s):  
T. Kondratyuk ◽  
A. Kalinichenko
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Activity Level ◽  
Black Yeast ◽  
Diffusion Method ◽  
Pinus Sibirica ◽  
Disc Diffusion Method ◽  
Abies Sibirica ◽  
Fungicide Activity ◽  
Pinus Sibirica Du Tour

Influence of essential oils of the following plants Rosmarinum officinalis L., Pinus sibirica Du Tour, Abies sibirica Ledeb., Juniperus communis L., turpentine oil, and polyhexamethyleneguanidine (PHMG) on black yeast-like fungi Exophiala alcalophila FCKU 304 was investigated. Disc-diffusion method was used. Level of the antifungal influence on X. alcalophila found to be different for each chemical. 5% PHMG is characterized by the highest fungicide activity. Level of the antifungal activity of essential oils of plants Rosmarinum officinalis, Pinus sibirica and Abies sibirica is similar to 1.5-3 % PHMG activity. The PHMG and essential oil of Rosmarinum officinalis found to cause exchanges of morphometric indices of cells, colony morphology and intensity of budding E. alcalophila what is considered as adaptations of investigated culture of black yeast-like fungus. Furthermore dimorphic transition 'yeasts – mycelium' of E. alcalophila was observed under influence of essential oil of Rosmarinum officinalis.

scholarly journals Формирование кроны кедра сибирского за 12-летний период после декапитации (пригородная зона г. Красноярска)

2021 ◽  
pp. 89-97
Author(s):  
Dmitriy Grishlov ◽  
Natalia Bratilova ◽  
Rimma Matveeva ◽  
Olga Butorova
Keyword(s):  
Pinus Sibirica ◽  
Pinus Sibirica Du Tour

Показаны особенности формирования кроны кедра сибирского (Pinus sibirica Du Tour) после декапитации, произрастающего на плантации «Метеостанция» в Учебно-опытном лесхозе Караульного лесничества в условиях юга Средней Сибири. Объектом исследований являлась 54-летняя плантация кедра сибирского, выращенная  из семян, заготовленных в 1964 г. в Лениногорском лесхозе (Республика Казахстан). Декапитация проведена у деревьев 42-летнего возраста в 2005 г. с оставлением ствола высотой 1,4-1,7 м. Верхняя часть кроны удалена на 50,0-66,7%. В 2017 г. деревья достигли высоты 5,6-9,1 м. Количество лидирующих побегов, заменивших центральный, составило 3-7 шт., длина которых за 12-летний период достигла 4,0-7,6 м. Деревья с диаметром ствола 12-18 см имели по 3-4, с диаметром 20-26 см – по 6-7 шт. лидирующих побега. Установлено, что уровень изменчивости высоты деревьев низкий; прироста побегов, диаметра ствола – средний, количества лидирующих побегов – высокий. Наибольшей высотой (9,1 м) отличалось дерево № 4-98, превосходя другие особи на 8,3-62,5%. Сопоставлено количество боковых ветвей, образовавшихся на лидирующих побегах за 5 лет (2013-2017 гг.). Отмечено, что их средний прирост за исследуемый период находился в пределах 23,6-45,5 см. Между диаметром ствола и числом лидирующих побегов коэффициент корреляции (r) равен 0,619; числом лидирующих побегов и количеством сформированных боковых ветвей спустя 7-12 лет после декапитации – 0,770, диаметром ствола при обрезке и высотой деревьев после 12 лет декапитации – 0,738.

scholarly journals Ontogeny of Siberian Stone Pine (Pinus Sibirica du Tour) in Southeastern West Siberian Plain

2011 ◽  
Vol 4 (1) ◽  
pp. 3-22 ◽  
Author(s):  
Nikolaeva Svetlana A. ◽  
◽  
Velisevich Svetlana N. ◽  
Savchuk Dmitry A. ◽  
◽  
...  
Keyword(s):  
West Siberian Plain ◽  
Pinus Sibirica ◽  
Stone Pine ◽  
Siberian Stone Pine ◽  
Siberian Stone ◽  
Pinus Sibirica Du Tour

A study of natural durability of selected coniferous wood species from north Asia affected by the fungus Coniophora puteana (Schumach.) P. Karst.

2020 ◽  
Vol 112 ◽  
pp. 32-35
Author(s):  
Boguslaw Andres ◽  
Agnieszka Jankowska ◽  
Grzegorz Duchnik
Keyword(s):  
Wood Species ◽  
Brown Rot ◽  
Larix Sibirica ◽  
Natural Durability ◽  
Pinus Sibirica ◽  
European Larch ◽  
Coniophora Puteana ◽  
North Asia ◽  
Coniferous Wood ◽  
Pinus Sibirica Du Tour

The aim of prestened study was to determine the natural durability of selected coniferous wood species from Asia to the effect of Coniophora puteana (Schumach.) P. Karst., which causes brown rot. The species tested were: Larix gmellini (Rupr.) Kuzen., Larix sibirica Ledeb. and Pinus sibirica Du Tour.. The test was conducted on the basis of PN-EN 350:2016-10 and PN-EN 113:2000. As a result of the research durability classes were determined. Wood durability of tested Asian species was compared with the domestic wood species such as Pinus sylvestris L. and Larix decidua Mill.. The most durable of the tested wood species was Larix sibirica Ledeb., while the European larch showed comparable durability. The wood of Larix gmellini (Rupr.) Kuzen. showed the lowest persistence among the tested species.

scholarly journals Accelerated formation of Siberian pine (Pinus sibirica Du Tour) stands: a case study from Siberia

2019 ◽  
Vol 65 (No. 8) ◽  
pp. 291-300
Author(s):  
Nikita Debkov
Keyword(s):  
Seed Production ◽  
Threshold Value ◽  
Pinus Sibirica ◽  
Natural Conditions ◽  
Normal Seed ◽  
Pine Trees ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine ◽  
Production Dynamics

Under natural conditions, Siberian pine Pinus sibirica begins to produce commercial cone yields of nuts relatively late (after more than 100 years). The aim of this study was to summarise the experience of the directed formation of Siberian pine forests in Siberia. Experimental objects included plots with traditional thinning of varying intensity and frequency as well as chemical treatment. We assessed the parameters of the stand and its seed production dynamics. Only stands with a minimum density (395–435 trees·ha–1) had a normal seed production energy (1.5 or more cones per shoot). Over-dense stands (830–930 trees·ha–1) were characterised by a low seed production energy (two times or more below the threshold value). In all plots, there were Siberian pine trees with absent or unacceptable seed production energy, which should be removed (DBH up to 28 cm). Seed production energy positively correlated with most tree parameters (age, height, diameter, volume, length and width of crown).

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