The episodes of high heat and low rainfall that have occurred in recent months show the urgency of finding innovative solutions to maintain crop performance while having a less impactful agriculture on human health and the environment. Biostimulants could be promising products that improve the efficiency of nutrient use by plants to enhance physiological performance, especially under adverse environmental conditions such as water or heat stress (Campobenedetto et al., 2021). The scientific community of the GPR Bordeaux Plant Science (Grand programme de Recherche, a network of research, infrastructures, training carried by the University of Bordeaux) believes that it is the responsibility of research to fill the knowledge gap in order to ensure the confident acceptance of these innovative solutions. We conducted a systematic study of phenotypes including easy-to-use measurements of a set of physical and biochemical plant traits and rapid hyperspectral reflectance measurements on leaf tomato (cv M82) that might have predictive potential. The experiments took place in greenhouses, with or without biostimulant (Stim pure liquid) and/or thermic treatment at the Astredhor Sud-Ouest station (France). We have identified plant traits and key infrared regions that are used to build models enabling the prediction of yield and merchantability of horticultural crops related to the response to biostimulant. These markers can give us insights into the mechanisms involved in the compromises between biomass production, resistance of plants to biotic and/or abiotic stress and the quality of plant products. The path from demonstration to operationalization of the approach is far from linear but could be useful for assessing the impact of innovative solutions and leading to a relevant decision-making tool for the manufacturers of these new products and the farmers who use them.< Réduire