Online: ISSN 2784 – 0360 | ISSN – L 2784 – 0360 | Print: ISSN 2784 – 0379 ISSN-L 2784 – 0360

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Rotaru Liliana

Preliminary Studies on Some Morpho-Structural and Biochemical Characterisation of Some Genotypes of Vitis vinifera L. Cultivated in Northeast Romania

Mar 8, 2024 |

Liliana Rotaru, Vasile Răzvan Filimon, Roxana Mihaela Filimon, Mihai Mustea, Roberto Renato Bernardis, Lucia Cintia Colibaba

ABSTRACT. The monitoring of new grapevine varieties with superior agrobiological and technological characteristics, in relation to the evolution of the climatic factors, represents an important and continuous objective of the worldwide viticultural research and breeding programs. Observations and determinations of the current study were performed on 11 new table grapes varieties created in Romania, growing in the Ampelographic collection of the University of Life Sciences Iasi, north-eastern area of Romania. The grapevine varieties were evaluated under the morpho-structural aspect, regarding the leaf area, the average weight of the grapes, the number and weight of the berries, rachis weight, the number and weight of the seeds, the weight of the skin and pulp, calculating the main technological indices. From a biochemical point of view, the content of photosynthetic pigments in leaves, the concentration of soluble dry solids and titratable acidity of the grapes were determined in the climatic condition of the Copou – Iasi vineyard. Therefore, the monitoring of genetic resources provides useful data for grape producers and researchers regarding the integration of new table grape varieties into the viticultural ecosystems, evaluating their yield and quality in correlation with the evolution and influence of the climatic factors.

Keywords: agrobiological and technological value; autochthonous grapevine variety; chemical composition; genetic resources; physico-structural characterization.

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The Production of Low-Alcohol Wines by Sequential Semi-Anaerobic Must Fermentation

Apr 11, 2023 |

Vasile Răzvan Filimon, Roxana Mihaela Filimon, Ancuța Nechita, Florin Dumitru Bora, Liliana Rotaru, Valeriu V. Cotea

ABSTRACT. Nowadays, consumers go towards products that provide food security and nutritional richness, consumption of highly alcoholic beverages not complying with these health-related requirements. This study aimed to obtain low-alcohol wines by performing sequential alcoholic fermentation of grape must (Muscat Ottonel). Thus, 11 commercial yeast strains (10 Saccharomyces cerevisiae and 1 Torulaspora delbrueckii) were preliminarily tested in anaerobic and semi-anaerobic conditions. Based on laboratory tests, grape must fermentation was sequentially initiated in semi-anaerobic conditions (loose cotton plugs; intermittent homogenization), with the T. delbrueckii strain (106 CFU/mL) and the addition of preliminarily selected S. cerevisiae strains (104 CFU/mL), to the consumption of 50% of the sugars in the must, to complete the fermentation. By applying this technology, dry wines were obtained with an alcohol content lower by up to 1.10% vol., but with a lower concentration of volatile terpenes, due to additional must oxidation. Also, semi-anaerobiosis enhanced glycerol synthesis by yeasts (< 35%), with a positive impact on the sensory characteristics of the wine. Keywords: alcoholic fermentation; glycerol; low-alcohol wine; non-Saccharomyces yeast; Torulaspora delbrueckii.

* Abstract published in Conference Programme dedicated to LIFE SCIENCES TODAY FOR TOMORROW

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Vine Varieties for White Wines in the Climate Context of the Odobesti Vineyard, Romania

Nov 18, 2022 |

Ionica Bosoi, Liliana Rotaru, Marioara Pușcalău, Cintia Colibaba

ABSTRACT. Odobeşti Vineyard is one of the most famous and oldest Romanian vineyards, with a focus on white wines. To improve the existing assortment of varieties over time at the Research and Development Station for Viticulture and Vinification, Odobesti (RDSVV, Odobești), four vine varieties were obtained and approved: ʹŞarbaʹ (1972), ʹBăbească griʹ (1975), ʹMioriţaʹ (1980) and ʹVranceaʹ (2018), with superior quality and productive potential and a high capacity to capitalise on the edaphoclimatic conditions specific to this viticultual area. This study presents the behaviour of these varieties of vines in the climatic conditions of the Odobesti Vineyard in the period 2017–2021. The following parameters were studied and determined: the phenological spectrum of the vine, fertility and productivity (% fertile shoots, fertility coefficients, productivity indices), quantity and quality of grape production (grapes/vine, average bunch weight, grape production/vine, sugar content, total acidity and glucoacidimetric index). The data obtained were compared with the ʹSauvignon Blancʹ variety, which is widely grown in this area. The evolution of the vegetation phenophases was conditioned by the climatic factors during the study period. There was a tendency to shorten them due to the increase in air temperature values. The variety ʹVranceaʹ presented a high fertility potential (89.5% fertile shoots), the varieties ʹBăbească griʹ and ʹMiorițaʹ showed a higher productive potential than the control variety ʹSauvignon Blancʹ (6.06–6.12 kg/vine), and the variety ʹȘarbaʹ recorded the highest accumulations in sugars (230.5 g/L). In the climatic context of the Odobești Vineyard, the white wine varieties ʹȘarbaʹ, ʹBăbeasca griʹ, ʹMiorițaʹ and ʹVranceaʹ have demonstrated a valuable agrobiological and technological potential, comparable to that of the ʹSauvignon Blancʹ variety.

Keywords: climatic conditions; fertility; vineyard; productivity; wine grapevine varieties.

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Agrobiological Value of Some White Grape Varieties Created at Research and Development Station for Viticulture and Vinification Odobești, Vrancea County, Romania

Feb 2, 2022 |

Ionica Bosoi, Liliana Rotaru, Cintia Colibaba, Marioara Pușcalău

ABSTRACT. Vine varieties react differently to the influence of environmental factors by decreasing or significantly intensifying the vigour of shoot growth, a biological reaction that also affects fertility and productivity. This article presents data on some agrobiological properties (vegetative growth of shoots, fertility and productivity) of some white wine varieties, created at the Research and Development Station for Viticulture and Vinification (R.D.S.V.V.) Odobești, Vrancea County, Romania) – Şarba, Băbească gri, Mioriţa and Vrancea, in the period 2020 – 2021. The data obtained were compared with the control variety Fetească regală. In Odobeşti vineyard, 2020 was much warmer than normal, characterized by a severely deficient rainfall regime resulting in atmospheric drought, followed by the gradual development of pedological drought. The vigour of shoots was negatively influenced by the climatic conditions of the vegetation period in 2020, the highest values being recorded for the varieties Șarba (159.6 cm) and Vrancea (141.5 cm), which showed significant positive differences, compared to the control variety. The fertility of the buds was lower in 2020, compared to 2021, the Vrancea variety being distinguished by higher potential fertility than the varieties Șarba, Băbească gri and Miorița, but lower potential fertility than the control variety. The absolute fertility coefficient (Cfa) had superunitary values for all varieties (1.07 – 1.50), and the relative fertility coefficient (Cfr) had subunitary values, except for the Vrancea variety (1.32). The varieties Șarba, Băbească gri and Miorița achieved an absolute productivity index (Ipa) superior to the control variety Fetească regală due to the higher average weight of the grapes, and the relative productivity index (Ipr) ranged from 199 for the Vrancea variety to 182 for the variety Șarba.

Keywords: grape variety; vigour; fertility coefficients; productivity index.

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© by the authors; licensee Journal of Applied Life Sciences and Environment, Iasi, Romania. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0)