The use of interspecific grapevine cultivars offers new perspectives for sustainable viticulture. Although the application of exogenous plant hormones has become widespread in recent years, data regarding the response of interspecific grapevine cultivars to treatments with biostimulants are scarce. The aim of the study was to evaluate the effect of different doses of gibberellic acid (GA₃) (25, 50 and 100 mg L⁻¹), applied by spraying the inflorescences in the late flowering phenophase, and of the complex product Cropmax® (1.0, 2.5 and 5.0 mL L⁻¹) applied by spraying the leaves in three different phenophases, on the phenology, fertility, physiological characteristics, grape yield and quality of the interspecific table grape cultivar Moldova (Guzal kara × Seyve-Villard 12-375), growing in temperate climate conditions (N-E Romania). The application of GA₃ at 50 mg L⁻¹ increased the plant productivity (36%), promoted fruit growth and rachis elongation, improved the percentage of the marketable yield (by 5.5%), balanced the sugar/acidity ratio, but affected the synthesis of phenolic compounds. Foliar application of Cropmax® at 2.5 mL L⁻¹ significantly improved the berry diameter, and sugar and anthocyanin accumulation, but grape acidity remained high. All treatments allowed the normal development of plant phenophases and grape maturation, but GA₃ application slightly extended the number of days of the annual biological cycle of the Moldova hybrid cultivar (up to 5.5 days), probably due to a temporary variation in the physiological parameters (except for stomatal conductance), as determined in mature leaves after the application of the exogenous growth regulator.

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.

This study evaluates viticultural parameters of the Golia grape variety in relation to variable climatic conditions over the 2020–2024 period and analyzes their impact on wine quality. The data show significant climatic variability, with warming trends causing earlier flowering and ripening by 11–13 days. Grape production varied depending on climatic conditions, with 2021 and 2024 recording the highest number of shoots per trunk and increased fertility in 2024. Low winter temperature led to reduced bud viability and affected the overall health of the vines and harvest yields. Average annual precipitation, especially from the growing season, significantly influenced actual yield (AY), while higher annual temperatures and sunshine duration (Sun) resulted in lower grape weight. Greater sugar concentrations accumulated in years with higher temperatures, while higher acidity levels registered at lower temperatures. Higher precipitation (Pp) coupled with thermal accumulation promoted higher dry extract and alcoholic strength (AS), significantly enhancing the perception of honey notes (R² > 0.7, p-value < 0.05). Furthermore, higher thermal regimes negatively impacted the expression of delicate aromatic compounds, diminishing specific notes such as rose and exotic fruits.

Climatic conditions play an essential role in the vegetative growth and phenology of grapevines, significantly affecting yield and the compositional profile of the resulting wines. This study evaluates the adaptability of the Golia grape variety to variable climatic conditions over the 2020-2024 period and analyzes their impact on wine quality. The data show significant climatic variability, with warming trends causing earlier flowering and ripening by 11–13 days. Grape production varied depending on climatic conditions, with 2021 and 2024 recording the highest number of shoots per trunk and increased fertility in 2024. Low winter temperature values led to reduced bud viability and affected the overall health of the vines and harvest yields. Average annual precipitation, especially from growing season significantly influenced actual productivity, while higher annual temperatures and sunshine duration resulted in lower grape weight. Greater sugar concentrations accumulated in years with higher temperatures, while higher acidity levels registered at lower values. The physicochemical properties of the wines were shaped by the quality of the raw materials, reflecting the direct im-pact of climatic variability on grape composition and wine characteristics. The sensory profile of the wines exhibited major annual variation. Floral and fruity aromas were more pronounced in cooler years, while high temperatures led to the development of specific notes such as rose and exotic fruits. The perception of sweetness and honey aroma was linked to higher alcoholic strength (R²=0.8876) and dry extract (R²=0.7719), whereas the wines’ unctuosity was determined by winter precipitation (R²=0.8751).

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.

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.