BUSCADOR RECOLECTA

In the current context of energy transition towards a model that has a lower impact on CO2 emissions [1], a circular economy system is also being sought, where emissions can be offset by the environment. To achieve these objectives, which in the case of the Iberian Peninsula are set at 2050 for both Portugal and Spain, as members of the European Union and therefore affected by the European Climate Law, where the EU commits to neutrality in carbon by 2050.

The agrivoltaic concept is taking shape all over the world and especially in Europe, but also in Asia and America, and its purpose is a combination of land use for agricultural and livestock purposes with the production of photovoltaic electricity.

This presentation reflects the experiments that are being initiated in three different locations under the umbrella of three projects whose results are intended to be mutually useful to advance this new technique.

The scarcity of water resources affects tomato production. Deficit irrigation may optimize water management with only a low reduction in yield. Deficit irrigation scheduling based on applied water presented no clear conclusions. Water stress management based on plant water status, such as water potential, could improve the scheduling. The aim of this work was to evaluate the physiological and yield responses of different tomato cultivars to deficit irrigation. Three experiments were carried out in 2020 and 2022 at the University of Seville (Spain). “Cherry” and “chocolate Marmande” cultivars with an indeterminate growth pattern were grown in a greenhouse. Treatments were: Control (full irrigated) and Deficit. Deficit plants were irrigated based on water potential measurements. Moderate water stress did not significantly reduce the yield, although it affected other processes. Fruit size and total soluble solids were the most sensitive parameters to water stress. The latter increased only when persistent water stress was applied. However, truss development and fruit number were not affected by the level of water stress imposed. Such results suggest that moderate water stress, even in sensitive phenological stages such as flowering, would not reduce yield. Deficit irrigation scheduling based on plant water status will allow accurate management of water stress., This research was supported by the project PID2021-1227722OB-I00, funded by the Ministerio de Ciencia e Innovación (MCIN/AEI/10.13039/501100011033/) and the Fondo Europeo de Desarrollo (FEDER)., Peer reviewed

<p>Water scarcity presents an increasingly urgent challenge with global implications for the production of irrigated vegetables. Among these crops, tomatoes stand out as one of the most widely cultivated. Given their vulnerability to water stress, it is crucial to ensure efficient and sustainable water management for tomato irrigation. This study aims to explore the varying capacities for drought avoidance, drought acclimation, and drought tolerance among three local and three commercial resilient tomato varieties in response to water stress and re-watering. We subjected tomato plants to either two brief periods of water stress (WE1) or one extended period of water stress (WE2), followed by rehydration, as evidenced by the measured stem water potential (Ψstem ≈ -1.6 MPa). Physiological and biochemical parameters were analyzed to understand how different tomato varieties respond to water stress. Our results did not reveal significant differences in the response to water stress among the varieties that could be attributed to their origin. Once the plants were rehydrated, they quickly regained their original values, with no statistically significant differences compared to untreated plants. An assessment of lipid peroxidation, antioxidant capacity, phenols, and flavonoids revealed that only during the second episode of water stress in WE1 plants or at the end of the prolonged water stress in WE2 plants did water stress trigger an overproduction of reactive oxygen species (ROS), which attacked membrane lipids and resulted in oxidative damage. However, after rehydration, tomato plants returned to normal values of oxidative parameters, indicating the absence of irreversible damage. Although the severe water stress did not compromise the viability of the plants, all treatments and varieties exhibited a predictable and substantial growth inhibition. In conclusion, the different tomato varieties studied displayed similar responses to water stress, primarily characterized by inhibition of gas exchange processes and heightened oxidative stress. Nonetheless, none of the plants suffered irreversible damage from this stress, as they fully recovered their normal physiological and biochemical values following re-watering.
The whole work can be download at: https://doi.org/10.1016/j.agwat.2023.108529</p>
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<p>Descripción del dataset</p>
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<p>Original data for the paper, in a excel file with several sheets.</p>
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<p>1. Metolodogía (empleada para la recogida o generación de los datos)</p>
<p>Data were obtained in an assay of tomato in a greenhouse.</p>