2. Articole

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Author: search.filters.author.Malii, AlionaStart date: 2023

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Now showing 1 - 6 of 6
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    Oil content in seeds by NMR relaxation method [Articol]
    (Editura USM, 2025) Harciuc, Oleg; Sütyemiez, Mehmet; Chistol, Marcela; Malii, Aliona; Stingaci, Aurelia
    The aim of our work was to evaluate the capability of NMR-relaxation method of the determination of oil content in walnut kernels and soybean seeds. NMR-relaxation spin-echoes for protons of the studied seeds were studied on a modernized NMR-relaxometer, using a sequence of 90°- and 180°- high-frequency pulses, with an interval 3.5 ms. As standards in NMR calibration for walnut kernels and for soybean seeds were used different oils. The oil content of commercial walnut kernels SRL “Monicol” is 69±1%, which corresponds to the typical range for the crop, 64- 72%. After harvest 2021 the minimal oil content was in the seeds of soybean variety Pentata (14,6±0,2% for the seeds with dry weight 100-150 mg and 14,9±0,4% for the seeds with dry weight 200-250 mg) and the maximal oil content was in seeds of soybean variety Ladutsa (19,3±0,3% for the seeds with dry weight 100-150 mg and 19,7±0,5% for the seeds with dry weight 150-200 mg).
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    Evaluation of osmotic stress tolerance during the germination stage in soybean genotypes [Articol]
    (Editura USM, 2025) Malii, Aliona
    To evaluate the tolerance of soybean genotypes to osmotic stress, a controlled germination experiment was performed on six soybean lines: three obtained by gamma-ray-induced mutagenesis (C15M7200, B2M8200, Z21M12200) and three by hybridization (L.4, L.8, L.86). Seeds were treated with three concentrations of PEG 6000 (0%, 10%, 15%) to simulate a water stress gradient. The analyzed parameters – germination rate and root length – were recorded 5 and 7 days after sowing. A significant reduction of both parameters was found with increasing PEG concentration, highlighting a different sensitivity between genotypes. Lines C15M7200 and B2M8200 showed better tolerance, while L.8 and Z21M12200 were the most affected. The results highlight genetic variability and support the utility of PEG testing in the early stages of breeding programs for the selection of drought-tolerant genotypes.
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    Studiul influenței razelor X asupra genotipurilor de soia
    (CEP USM, 2024) Malii, Aliona
    The analysis of the impact of X-rays on soybean plants revealed a negative correlation between radiation dose and survival rate. The optimal mutation induction doses are up to 200 Gy for the Laduța variety and Z3M10100 line, while for the Clavera variety, this dose is limited to 150 Gy. Each genotype demonstrated variability in response to X-rays, suggesting different levels of tolerance. The height of the plants significantly decreased with increasing radiation doses, highlighting adverse effects on development. Controls, with no exposure, showed 100% survival, thus emphasizing the need for caution in using radiation in breeding research.
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    Water use efficiency in biology, agriculture and sustainable development
    (CEP USM, 2024-10-07) Harciuc, Oleg; Malii, Aliona
    In the Republic of Moldova 2017-2023 water use efficiency in rainfed soybean fields was in the range of 0,3-0,8 g grain/kg water. Under field conditions, for the Ladutsa soybean variety, a WUE of 0,75 g of grain/kg of water was obtained with seasonal precipitation of 94 mm, which is several times less than 317 mm, considered optimal for achieving the average agricultural WUE of 0,57.
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    WATER USE BY SOYBEAN VARIETIES OF DIFFERENT MATURITY GROUPS
    (CEP USM, 2023) Malii, Aliona; Harciuc, Oleg
    The seasonal change in soil moisture reserves in dependence on the genetic form of soybeans was studied. It has been established that the deep layers of the soil (40-150 cm) more consistently reflect the influence of the plant component than the surface ones. In 2021, water reserves decreased in the 0-150 cm layer: for the Pentata variety - by 103 mm, and for the Onika variety- by 53 mm. Thus, Onika variety (MG I) retained 50 mm more water in the field for the next season compared to variety Pentata (MG III).
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    CRITICAL SOIL MOISTURE IN RAINFED SOYBEAN FIELD
    (CEP USM, 2023) Harciuc, Oleg; Malii, Aliona
    The content of soil moisture in different soil horizons of soybean fields in the 0-150 cm layer was studied in years with different meteorological conditions. The current forecast of the degree of aridity of the growing season is carried out according to soil moisture data in the soil layer 0-150 cm. In the sawing the critical level of soil moisture in rainfed soybean fields was 300 mm. In the pod filling stage the critical level of soil moisture in rainfed soybean fields was 200 mm.