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43
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Introduction
I’m a researcher in grapevine ecophysiology in aspects related to viticulture, canopy management, irrigation, and genetic diversity. These last years we have been focused on the adaptation to climate change, and its impacts on the main physiological processes involved in berry and wine composition. In parallel, we have been rescuing, conserving, and characterizing the enological potential of Argentinian and South American varieties.
Publications
Publications (43)
Higher temperatures in recent years have advanced berry ripening and harvest date, decoupling berry sugar accumulation of anthocyanins final concentration and therefore reducing wine potential color. Late pruning is proposed as a tool to modify phenology and to delay berry ripening later in the season when temperatures are lower. The aim of this wo...
La vid (Vitis vinifera L.) fue introducida en Sudamérica durante el siglo XVI. En los valles de Ica y Cañete, los nombres "Quebranta Mollar", "Mollar" y "Prieta Mollar" son comúnmente utilizados en referencia a los diferentes colores de las bayas de estas variedades dentro de un mismo racimo. Esta heterogeneidad en cuanto al color de las bayas, sum...
These last years, minor cultivars have gained attention as they provide an opportunity to offer original products in a global market and to combat global warming. Recent evidence brought to light the existing diversity within the group of autochthonous cultivars from Argentina and other South American countries, commonly known as criollas. The obje...
This study showed that the 29 collected samples corresponded to 11 genotypes: seven traditional cultivars and four unknown genotypes not registered previously. The
known cultivars were 'Muscat of Alexandria', 'Listán Prieto', 'Quebranta', 'Moscatel Rosado', 'Pedro Giménez', 'Muscat Hamburg' and 'Palomino Fino'. The four not registered genotypes ar...
Supplementary material of the manuscript:
Prospection and identification of traditional-heritage Peruvian grapevine cultivars (Vitis vinifera L.) from Ica and Cañete valleys
Late pruning is a field technique that has recently been proposed to mitigate the advance in phenology produced by global warming. However, contrasting effects have been observed depending on the cultivar and the date of pruning evaluated. In this work, our aim was to evaluate the effects of delayed pruning on phenology, vegetative growth, yield co...
Background and Aims
Global warming will threaten vineyard sustainability in warm and arid regions. Therefore, increasing water use efficiency (WUE) is essential for long-term viticulture sustainability. Nevertheless, studies concerning the response of stomata and WUE to temperature are scarce. We evaluated the effect of sustained warming on WUE and...
En Latinoamérica, las primeras plantas de vid fueron introducidas por los colonizadores españoles a inicios del siglo XVI. En cada uno de estos países, se cuenta con un gran número de variedades autóctonas, que se denominan “criollas”. Estas variedades se originaron a lo largo de casi 500 años de historia vitivinícola en la región, derivadas de cru...
The growing demand in recent years for sustainable wine production has led to the management of waste and by-products. Among them, vine-shoots could be used as additives comparable to the oak fragments widely employed in enology. This work analyzes the feasibility of applying vine-shoot chips during winemaking and the aging of Malbec and Bonarda wi...
At present in our country, 45% of the total surface of vineyards is implanted with vertical shoot positioning (VSP) which around 30% belongs to spurs cordon. Although this type of conduction is easy implementation, manage and supervise, it must be conducted in an appropriate way, mainly in the pruning and trimming tasks in order to avoid aging the...
Plants acclimate to shade by sensing light signals such as low photosynthetic active radiation (PAR), low blue light (BL) levels and low red-to-far red ratios (R:FR) trough plant photoreceptors cross talk. We previously demonstrated that grapevine is irresponsive to variations in R:FR and that BL-attenuation mediates morphological and architectural...
Photosynthesis acclimation to high temperature differs among and within species. Grapevine intra-specific variation in photosynthetic acclimation to elevated temperature has been scarcely assessed. Our objectives were to (i) evaluate the mechanisms underlying long-term acclimation of photosynthesis to elevated temperature in grapevine, and (ii) det...
Light is a main environmental factor that determines leaf microclimate within the vine, as well as its photosynthesis and carbohydrate metabolism. This study aimed to examine the relationships between photosynthesis, carbohydrate metabolism, and the expression of related genes in leaves of grapevine grown under different radiation regimes. During t...
Background and aims:
Scaling from single leaf to whole canopy photosynthesis faces several complexities related to variations in light interception and leaf properties. To evaluate the impact of canopy strucuture on gas-exchange, we developed a functional-structural plant model to upscale leaf processes to the whole canopy based on leaf N content....
This paper presents HydroShoot, a leaf-based functional-structural plant model (FSPM) that simulates gas-exchange rates of complex plant canopies under water deficit conditions. HydroShoot is built assuming that simulating both the hydraulic structure of the shoot together with the energy budget of individual leaves is the asset for successfully sc...
The denomination of “Uva de Italia” or “Italia” is commonly used by growers to refer to a group of varieties used from the colonial times to making a brandy of Pisco with muscat aroma. Previous work have demonstrated that Uva de Italia corresponds in fact to the variety
Muscat of Alexandria, a widely spread variety around the world and in South Am...
This paper aims at presenting HydroShoot, a functional-structural plant model (FSPM) that is developed to simulate gas-exchange rates of complex plant canopies under water deficit conditions, by scaling up gas-exchange rates from the leaf to the canopy levels. The main hypothesis is that simulating both the hydraulic structure of the shoot together...
The denomination of “Uva de Italia” or “Italia” is commonly used by growers to refer to a group of varieties used from the colonial times to making a brandy of Pisco with muscat aroma. Previous work have demonstrated that Uva de Italia corresponds in fact to the variety Muscat of Alexandria, a widely spread variety around the world and in South Ame...
Grapevine is one of the most important fruit crops worldwide. Vineyard management practices affect light
interception and spectral characteristics inside the canopy. Plant photoreceptors drive shade acclimation responses
after the perception of light signals such as low photosynthetic active radiation (PAR), low blue light
(BL) levels and low red-t...
Grapevine is one of the most important fruit crops worldwide. Vineyard management practices affect light interception and spectral characteristics inside the canopy. Plant photoreceptors drive shade acclimation responses after the perception of light signals such as low photosynthetic active radiation (PAR), low blue light (BL) levels and low red-t...
Grapevines are crops of global economic importance that will face increasing drought stress because many varieties are described as highly sensitive to hydraulic failure as frequency and intensity of summer drought increase. We developed and used novel approaches to define water stress thresholds for preventing hydraulic failure, which were compare...
Hydraulic conductance and water transport in plants may be affected by environmental factors, which in turn regulate leaf gas exchange, plant growth and yield. In this study, we assessed the combined effects of radiation and water regimes on leaf stomatal conductance (gs), petiole specific hydraulic conductivity (Kpetiole) and anatomy (vessel numbe...
Background and Aims: Based on 19 nuclear simple sequence repeat markers and parental analysis, we aimed to identify and propose the pedigree of different accessions held at the Estación Experimental Agropecuaria Mendoza of the Instituto Nacional de Tecnología Agropecuaria germplasmcollection. The results were compared with data recorded in large, i...
The measurement of the carbon balances is necessary to evaluate the contribution of different biomes to carbon sequestration and therefore to mitigate the global climate change effects. Carbon balance of grapevine is of major interest because of the extension and wide distribution of this crop, but also to characterize its sustainability and to sat...
Background and AimsRegulated deficit irrigation and crop load adjustment are viticultural practices used to improve grape and wine composition. Our objective was to evaluate the combined effect of irrigation and crop load levels on leaf photosynthesis, accumulation of non-structural carbohydrates and leaf carbon utilisation during the season.Method...
Modelling the spatial and temporal distribution of leaf nitrogen is central to specify photosynthetic parameters and simulate canopy photosynthesis. Leaf photosynthetic parameters depend both on local light availability and whole plant N status. The interaction between these two levels of integration has generally been modelled by assuming an optim...
The main limitation imposed by water deficit on photosynthesis is a decreased CO 2 diffusion to the chloroplast mediated by stomata closure. However, a decrease in mesophyll conductance, electron transport rate through photosystem II or a relative increase in photorespiration have also been observed in different studies. The degree of importance of...
The combined effects of radiation and water supply on leaf water potential, stomatal conductance and petiole hydraulic conductance (k petiole) of field-grown grapevines (Vitis vinifera L. cv. Chasselas) were studied during 2013 growing season at the Agroscope Research Station in Leytron (Switzerland). Combinations of two irrigation levels (I: irrig...
Influencia de la exposición a la radiación sobre el metabolismo de hidratos de carbono en hojas de vid cv. Malbec Resumen. La luz es el factor principal que determina la actividad fotosintética de las hojas y por lo tanto el crecimiento y desarrollo de la planta. El objetivo de este trabajo fue evaluar el efecto de diferentes exposiciones de hojas...
Xylem hydraulic conductance and therefore, water transport, is affected by environmental factors which in turn limit leaf gas exchanges, plant growth and yield. In this study, we assessed the combined effects of light and water supply on leaf water potential, stomatal conductance and petiole hydraulic conductance (kpetiole) of field-grown grapevine...
Background and AimsRegulated deficit irrigation (RDI) and bunch thinning are two viticultural practices applied worldwide. There is limited knowledge, however, about their combined effects on carbohydrate dynamics and accumulation. We evaluated during year 3 and 4 of the experiment the effect of 4 consecutive years of RDI and bunch thinning on carb...
Photosynthesis and carbohydrate dynamics are highly affected by abiotic stresses, making them a target to be studied in a context of fluctuating and constraining environment. The impact of regulated deficit irrigation (RDI) and crop load on grape and wine quality have been widely studied. However, there is limited knowledge about the effects of com...
Biomass production in plants is primarily determined by a balance between carbon assimilation through photosynthesis, carbon storage, respiration and sugar exportation. Photosynthesis and carbohydrate dynamics are two processes affected by abiotic stresses, making them a key target to be studied in a context of fluctuating environment where the res...
Understanding the distribution of gas exchange within a plant is a prerequisite for scaling up from leaves to canopies. We evaluated whether leaf traits were reliable predictors of the effects of leaf ageing and leaf irradiance on leaf photosynthetic capacity (V(cmax) , J(max) ) in field-grown vines (Vitis vinifera L). Simultaneously, we measured g...
An experiment was conducted during the 2006-07 growing season to determine the effects of changes in canopy architecture on plant water status, in an irrigated 'Syrah' vineyard in Mendoza, Argentina. Changes in canopy architecture were carried out in the Ybm INTA trellis system in which the canopy can be opened or closed generating a single or a do...
Aims: Genetic variability in grapevine cultivars may influence their strategy to cope with drought through stomatal regulation of transpiration rate. The aim of the present study was to evaluate the stomatal sensitivity of five cultivars (Ekigaïna, Grenache, Marselan, Mourvèdre, and Syrah) to soil water status and air water vapor pressure deficit (...
