Pub Date : 1900-01-01DOI: 10.46646/2521-683x/2021-2-15-20
M. V. Lazarenko, S. Buga
According to the results of the investigations, carried out in 2017–2020 in the green spaces of cities in Belarus, the damage caused by larvae of Phytomyza agromyzina Meigen, 1830 to Siberian dogwood (Cornus alba L.) and blood twig dogwood (Cornus sanguinea (L.) Opiz), based on determining the relative area of damaged leaf surface, was assessed. The values of this parameter for individual leaf blades varied in the range from 0.86 to 63.58 %, while the average for the samples did not exceed 24.47 %. The total area of Ph. agromyzina mines on individual Cornus leaf blades ranged from 0.23 to 3.65 cm2. Using the nonparametric Mann–Whitney and Kolmogorov–Smirnov tests, the differences in medians and the integral differences between the samples were estimated. These values were not statistically significant when comparing data for Minsk and Vitebsk, and different years for both C. alba and C. sanguinea. However, in the values of the relative area of the damaged surface between the samples of both Cornus species the differences were statistically significant (p <0.05).
{"title":"DAMAGE CAUSED BY LARVAE OF MINING FLY (PHYTOMYZA AGROMYZINA MEIGEN, 1830) TO DOGWOODS IN URBAN GREEN SPACES","authors":"M. V. Lazarenko, S. Buga","doi":"10.46646/2521-683x/2021-2-15-20","DOIUrl":"https://doi.org/10.46646/2521-683x/2021-2-15-20","url":null,"abstract":"According to the results of the investigations, carried out in 2017–2020 in the green spaces of cities in Belarus, the damage caused by larvae of Phytomyza agromyzina Meigen, 1830 to Siberian dogwood (Cornus alba L.) and blood twig dogwood (Cornus sanguinea (L.) Opiz), based on determining the relative area of damaged leaf surface, was assessed. The values of this parameter for individual leaf blades varied in the range from 0.86 to 63.58 %, while the average for the samples did not exceed 24.47 %. The total area of Ph. agromyzina mines on individual Cornus leaf blades ranged from 0.23 to 3.65 cm2. Using the nonparametric Mann–Whitney and Kolmogorov–Smirnov tests, the differences in medians and the integral differences between the samples were estimated. These values were not statistically significant when comparing data for Minsk and Vitebsk, and different years for both C. alba and C. sanguinea. However, in the values of the relative area of the damaged surface between the samples of both Cornus species the differences were statistically significant (p <0.05).","PeriodicalId":269987,"journal":{"name":"JOURNAL OF THE BELARUSIAN STATE UNIVERSITY ECOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134144707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.46646/2521-683x/2021-2-29-35
Volga M. Khramchankova, M. V. Matveyenkau
In vitro, the photoprotective, cytotoxic and photomodifying properties of hexane and benzene extracts from the widely distributed in Belarus lichens Cladonia arbuscula, Evernia prunastri, Hypogymnia physodes, Ramalina pollinaria and Xanthoria parietina in the culture of human keratinocytes (HaCAT), are estimated. It was found that these extracts are not photoprotective, they have a photomodifying effect upon irradiation of keratinocyte cultures with ultraviolet light. Hexane extract of E. prunastri and benzene extracts of R. pollinaria and H. physodes at a concentration of 2.5 μg/ml are photoprotectors that weaken the effect of ultraviolet radiation by 1.6 ÷ 1.8 times. Extracts of C. arbuscula and X. parietina are photosensitizers – they increase the toxic effect of ultraviolet radiation by 10 or more times, regardless of the concentration of the extract in the nutrient medium. Hexane and benzene extracts of C. arbuscula and H. physodes lichens are cytotoxic to the HaCAT culture. With an increase in the dose of ultraviolet irradiation of keratinocytes from zero to lethal values, the benzene extract of R. pollinaria acted as a photoprotector at a concentration of 2.5 μg / ml, and as a photosensitizer at higher concentrations. The hexane and benzene extracts of E. prunastri and H. physodes exhibited sensitizing properties that increased with an increase in the concentration of lichen extracts. C. arbuscula hexane extract and X. parietina benzene extract were the most potent photosensitizers.
{"title":"PHOTOPROTECTIVE, CYTOTOXIC AND PHOTOMODIFYING ACTIVITY OF LICHEN BIOMASS NON-POLAR FRACTIONS AGAINST HUMAN KERATINOCYTE (HaCAT)","authors":"Volga M. Khramchankova, M. V. Matveyenkau","doi":"10.46646/2521-683x/2021-2-29-35","DOIUrl":"https://doi.org/10.46646/2521-683x/2021-2-29-35","url":null,"abstract":"In vitro, the photoprotective, cytotoxic and photomodifying properties of hexane and benzene extracts from the widely distributed in Belarus lichens Cladonia arbuscula, Evernia prunastri, Hypogymnia physodes, Ramalina pollinaria and Xanthoria parietina in the culture of human keratinocytes (HaCAT), are estimated. It was found that these extracts are not photoprotective, they have a photomodifying effect upon irradiation of keratinocyte cultures with ultraviolet light. Hexane extract of E. prunastri and benzene extracts of R. pollinaria and H. physodes at a concentration of 2.5 μg/ml are photoprotectors that weaken the effect of ultraviolet radiation by 1.6 ÷ 1.8 times. Extracts of C. arbuscula and X. parietina are photosensitizers – they increase the toxic effect of ultraviolet radiation by 10 or more times, regardless of the concentration of the extract in the nutrient medium. Hexane and benzene extracts of C. arbuscula and H. physodes lichens are cytotoxic to the HaCAT culture. With an increase in the dose of ultraviolet irradiation of keratinocytes from zero to lethal values, the benzene extract of R. pollinaria acted as a photoprotector at a concentration of 2.5 μg / ml, and as a photosensitizer at higher concentrations. The hexane and benzene extracts of E. prunastri and H. physodes exhibited sensitizing properties that increased with an increase in the concentration of lichen extracts. C. arbuscula hexane extract and X. parietina benzene extract were the most potent photosensitizers.","PeriodicalId":269987,"journal":{"name":"JOURNAL OF THE BELARUSIAN STATE UNIVERSITY ECOLOGY","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132175549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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