Друковані видання. Навчально-науковий інститут агротехнологій, селекції та екології

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Browsing Друковані видання. Навчально-науковий інститут агротехнологій, селекції та екології by Author "Barabolia, O. V."

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    Analysis of the state of dendroflora of park zones in Poltava concerning its its lesion by mistletoe (Viscum album L.)
    (2023) Pysarenko, V. M.; Pishchalenko, M. A.; Barabolia, O. V.; Krasota, O. G.; Писаренко, Віктор Микитович; Піщаленко, Марина Анатоліївна; Бараболя, Ольга Валеріївна; Красота, Олена Григорівна
    Mistletoe (Viscum album L.) white is the only plant on the Earth that has a unique substance that paralyses cancer cells and simultaneously stimulates human immunity. However, despite its curative properties, mistletoe white has so far caused considerable damage to tree plantations in human settlements, acting not only as a parasitic plant, but also as a spreader of various diseases of woody plants. Mistletoe, being an inseparable component of tree plantations, both natural and urbanized ecosystems, settling on trees. Then it begins to destroy them intensively. This is why the question of protection of trees from mistletoe white is relevant at present. The purpose of the article is research the state of tree species in park zones of Poltava concerning their damage by white mistletoe (Viscum album L.). The article presents the results of the analysis of the state of the main tree species of the park zones of Poltava city of concerning their lesion by white mistletoe during 2017‒2022. According to the results of the study identified tree species, which due to their species biologo-physiological features are affected more and vice versa show greater resistance to damage by mistletoe white (Viscum album L.). Recommendations for improving the species composition of tree species in park areas of Poltava, taking into account their resistance to mistletoe white damage, have been formulated. For the first time, we studied the degree of damage to deciduous trees in the park areas of Poltava, and set the degree of damage to trees affected by white mistletoe depending on their species biology and physiology, particularly, the structure and thickness of the bark. The influence of species-specific biologic and physiological features of tree species in the park areas of Poltava on the degree of their lesion by mistletoe white has been established. The most resistant woods have been determined, which can be recommended for renewal of the species composition of the dendroflora of the park zones of the urban ecosystem.
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    Response of Triticum aestivum seedlings of different ecological and geographical origin to heat and drought: relationship with resistance to oxidative stress and osmolyte accumulation
    (2023) Kolupaev, Yu. E.; Yastreb, T. O.; Ryabchun, N. I.; Kuzmyshyna, N. V.; Shkliarevskyi, M. A.; Barabolia, O. V.; Pysarenko, V. M.; Бараболя, Ольга Валеріївна; Писаренко, Віктор Микитович
    The phenomenon of plant cross-tolerance to various stressors, particularly heat and drought, has been studied in considerable detail. However, there are no data on the relationship between resistance to these stressors in Triticum aestivum cultivars of different ecological and geographical origins at the stage of etiolated seedlings. At the same time, they are used for an accelerated assessment of the heat and drought resistance of breeding samples (separately for each factor). This work compared the response of seedlings of seven winter common wheat cultivars to heat stress (4-hour heating at 45°C) and a model drought (action of 12% PEG 6000). A correlation was found between the inhibition of seedling biomass accumulation as a whole (r=0.55) and separately for shoots (r=0.66) under heat and osmotic stress. A high correlation was shown between inhibition of shoot growth and accumulation of hydrogen peroxide and lipid peroxidation (LPO) products in shoots during heating (r=0.91 and 0.76, respectively) and a much lower correlation between the values of these markers of oxidative stress and inhibition of shoot growth during drought. A significant inverse correlation was found between the accumulation of sugars in the shoots and inhibition of shoot growth under drought (r=-0.85), and moderately high under heat stress (r=-0.60). At the same time, only a positive medium correlation (r=0.49) was observed between proline content and growth inhibition under both types of stress. However, a high positive correlation was found between proline and LPO products under drought conditions (r=0.91). It is concluded that the resistance of wheat seedlings to oxidative stress is more closely related to heat tolerance than to drought tolerance. The results also indicate a significant contribution of sugars, but not proline, to the resistance of wheat seedlings to drought and heat stress.