Influence of water scarcity on macronutrients contents in young leaves of wine grape cultivars

Abstract

This study aimed to determine the variability of plant nutrition content in two-year old local and well-known wine grape cultivars under different water constraint scenarios. Own rooted and potted eight grapevine cultivars (cv. ‘Adakarası’, ‘Papazkarası’, ‘Karasakız’, ‘Karalahana’, ‘Yapıncak’, ‘Vasilaki’, ‘Cabernet Sauvignon’ and ‘Sauvignon Blanc’) were subjected to five irrigation treatments (100% daily irrigation of available water capacity (AWC), 75% irrigation of AWC, 50% irrigation of AWC, 25% irrigation of AWC, and no irrigation for 0% treatment) for two consecutive years during vegetative growth (May – late September). An increase in nitrogen, potassium and magnesium contents in leaf tissues with decreasing water amount was observed. Similar effect was found for phosphorus and calcium contents. The sulfur concentration in leaf tissues remained almost unchanged. In addition, the variability of genetic potential influenced the nutrient intake of the studied cultivars. The ability of grapevine cultivars to cope with the water deficit of the cultivars should definitely be assessed in adaptation strategies developed to make viticulture sustainable under the effects of the climate crisis.

A New Approach for Element Characterization of Grapevine Tissue with Laser-Induced Breakdown Spectroscopy

“…Understanding the elemental composition of grapes is essential Horticulturae 2024, 10, 82 2 of 14 for optimizing cultivation practices, encompassing factors like irrigation and fertilization, and ensuring the long-term sustainability of vineyards. Climate change-induced water availability shifts directly affect the grape composition [7,8]. Moreover, pollutants present in the environment [9] and soil degradation attributed to heavy metals [10] can manifest in various grape organs, potentially interfering with the overall composition.…”

Defoliation and water leaf potential effects on oenological properties of Merlot (Vitis vinifera L.) grape must

“…Leaves are organs that have critical physiological tasks in the establishment of photosynthesis, transpiration, and carbon balance in the grapevine, the regulation of the microclimate in the canopy, the establishment of the plant and soil water budget balance, the accumulation of sugar and nitrogen in the berry. The total biomass produced by the grapevine is directly related to the amount of carbon the leaves absorb during the photosynthesis process [Candar et al 2021].…”

“…The physiological activity also affects the total leaf area on the grapevine, yield, and biochemical processes during the ripening period. However, leaf shape and size may be ineffective in some cases [Chitwood et al 2016, Candar et al 2021.…”

Exploring the relationship between leaf water potential, defoliation, and grape berry physical properties of Merlot (Vitis vinifera L.) grapevine

“…The attainment of optimal berry maturity and wine quality, particularly in cool climates, relies on striking a balance between leaf area and yield, as highlighted by King et al (2015). Numerous researchers have endeavored to elucidate the impact of cultivation practices on grapevine, employing different varieties and treatments to explore this topic (Smart et al, 1990;Deloire et al, 2005;Poni et al, 2009;Korkutal and Bahar, 2013;Bahar et al, 2017;Candar et al, 2019;Korkutal et al, 2019;2021b;Candar et al, 2020a;2020b;Alço et al, 2023).…”