Sensory and functional quality characterization of protected designation of origin ‘Piennolo del Vesuvio’ cherry tomato landraces from Campania-Italy

Abstract Compositional characterization was performed on seven ‘Pomodorino del Piennolo del Vesuvio’ (PPV) tomato landraces, a signature product of Campania (Italy) threatened by genetic erosion. Characterization encompassed determinations of macro-minerals, soluble carbohydrates, starch, acidity, lycopene, polyphenols, anthocyanins, protein and free amino acids. Exceptionally high dry matter (13.0±0.2 %) and sugar content (101.3±3.8 μmol g -1 fw) and very low (0.007-0.009) Na/K ratio were invariably obtained across landraces, contrasted by significant variation in acidity (28.5-3.9 g kg -1 dw). Giagiu, Acampora and Riccia San Vito differentiated by high polyphenols content (131.8±2.5 mg 100g -1 ) while Acampora, Cozzolino and Fofo by high lycopene content (13.3±10.6 mg 100g -1 fw). Glutamate, GABA and glutamine represented 65% of the 22 detected amino acids mean total content. Glutamate, linked to umami taste, was highest (19.2 µmol g -1 fw) in Fofo. Our results will contribute towards the systematic documentation sensory and functional quality profiles of an important collection of tomato landraces.