The episodes of high heat and low rainfall that have occurred in recent months show theurgency of finding innovative solutions to maintain crop performance while having a lessimpactful agriculture on human health and the environment. Biostimulants could bepromising products that improve the efficiency of nutrient use by plants to enhancephysiological performance, especially under adverse environmental conditions such aswater or heat stress (Campobenedetto et al., 2021).The scientific community of the GPR Bordeaux Plant Science (Grand programme deRecherche, a network of research, infrastructures, training carried by the University ofBordeaux) believes that it is the responsibility of research to fill the knowledge gap inorder to ensure the confident acceptance of these innovative solutions. We conducted asystematic study of phenotypes including easy-to-use measurements of a set of physicaland biochemical plant traits and rapid hyperspectral reflectance measurements on leaftomato (cv M82) that might have predictive potential. The experiments took place ingreenhouses, with or without biostimulant (Stim pure liquid) and/or thermic treatment atthe Astredhor Sud-Ouest station (France). We have identified plant traits and key infraredregions that are used to build models enabling the prediction of yield and merchantabilityof horticultural crops related to the response to biostimulant.These markers can give us insights into the mechanisms involved in the compromisesbetween biomass production, resistance of plants to biotic and/or abiotic stress and thequality of plant products. The path from demonstration to operationalization of theapproach is far from linear but could be useful for assessing the impact of innovativesolutions and leading to a relevant decision-making tool for the manufacturers of thesenew products and the farmers who use them.< Réduire