2. Articole

Permanent URI for this collectionhttps://msuir.usm.md/handle/123456789/13419

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Author: search.filters.author.Elisovetcaia, Dina

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    Impact of non-optimal temperature and bioregulator on root and seedling vigour of corn [Articol]
    (Editura USM, 2025) Ivanova, Raisa; Lutcan, Elena; Vanicovici, Nicolai; Borovskaia, Ala; Elisovetcaia, Dina
    Take into account that the corn vigour has the strong correlated field emergence and yield, the purpose of this work was to evaluate the combined influence of non-optimal temperatures and a natural bioregulator on the vigour of corn root and seedling. The seeds of Porumbeni 455 corn hybrid pre-treated with natural bioregulator (JS) extracted from Juniperus sabina were subjected to treatment at 50°C (heat test) and at 10°C (cold test). The vigour of root and seedling was assessed after seed germination. Temperature above the optimum significantly affected both the vigour of root and the vigour of seedling, but temperature below the optimum only reduced the root vigour of the tested corn hybrid. The JS bioregulator contributed to an increase in root system vigour. Corn seeds pre-treated with JS had root vigour greater than untreated ones by 13.08 and 18.46%, respectively in the cold and heat test. The evaluation of factor impact showed that the temperature influenced both the root and seedling vigour more than the treatment with the bioregulator, and their combined effect significantly modified only the root vigour.
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    Adaptation of beech plants from different provenances to natural growth conditions [Articol]
    (Editura USM, 2025) Elisovetcaia, Dina; Ivanova, Raisa; Popovschi, Ecaterina; Fedorenco, Elena; Brindza, Ján
    This study assessed the adaptive potential of Fagus sylvatica L. seedlings from various provenances under natural growth conditions in the Republic of Moldova. Between 2022 and 2024, seedlings of different ages and origins (Slovakia, Romania, Moldova, and Ukraine) were transplanted and monitored. Key indicators included adaptation rate, survival rate and annual growth. Seedlings from Slovak provenances (Nitra-19 and Rožňava-22) showed the highest initial transplant resistance, with survival rates of 96.15% and 97.00%, respectively. Plants from Ciorești-21 (Republic of Moldova) followed closely, demonstrating the highest survival rate (87.00%) one year after transplantation. Growth assessments showed that although Romanian seedlings (Humosu-20) were initially taller, those from Slovakia and Republic of Moldova surpassed them in growth after one year. Adaptation was influenced by genetic and epigenetic factors, seedling morphology, precipitation levels, and climatic similarity between the origin site and the planting location. These results highlight the importance of selecting suitable provenances sites for beech seed collection and conditions for successful conservation and restoration of beech forests.
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    Effect of X-ray radiation on the viability of European beech seeds
    (CEP USM, 2024-10-07) Elisovetcaia, Dina; Ivanova, Raisa; Fedorenco, Elena
    Fagus sylvatica seeds from the "Plaiul Fagului" Natural Reserve, Republic of Moldova (PF-23) were treated in peeled (without pericarp) and unpeeled (with pericarp) form with X-ray doses from 25 to 425 Gy. No linear dependence of the viability of both peeled and unpeeled seeds on the radiation dose was established using the hydrogen peroxide test (HP). The use of the Indigo-carmine test (IC) made it possible to reveal a linear dependence of the viability of beech seeds (with pericarp) on the irradiation dose of X-rays. X-ray treatment in doses from 50 to 300 Gy reduced seed viability in the range from 39.53 to 48.84% (limit 50%); X-rays treatment above 600 Gy reduced seed viability by 67.44% or more.
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    QUALITY CHANGES DURING STORAGE OF BEECH SEEDS COLLECTED FROM DIFFERENT PLACES
    (CEP USM, 2023) Elisovetcaia, Dina; Ivanova, Raisa; Popovschi, Ecaterina; Mascenco, Natalia
    In this study, the changes in quality of Fagus sylvatica seeds collected in 2020 from different places of the Republic of Moldova (Plaiul Fagului, Hîrjauca) and Ukraine (Zakarpattia) on the third year of storage were evaluated. Beech seeds quality maintenance depended on the values of moisture, initial viability and seeds germination. The seeds from the Plaiul Fagului with a higher initial germination 76.7-84.0% and lower moisture content (8.69-9.24%) slightly reduced their quality during storage, by 1.0-2.3%.The germination indices such as germination rate, mean daily germination, average seed germination time, total time of seed germination, were improved by treatment of stored seeds with the natural bioregulator, genistifolioside. Treatment with genistifolioside also contributed to the elongation of seed roots by 17- 24% in all variants.