RT Journal Article
SR Electronic
T1 Selection of a Mechanical Property for Flesh Firmness of Table Grapes in Accordance with an OIV Ampelographic Descriptor
JF American Journal of Enology and Viticulture
JO Am. J. Enol. Vitic.
FD American Society for Enology and Viticulture
SP 206
OP 214
DO 10.5344/ajev.2014.13115
VO 65
IS 2
A1 Simone Giacosa
A1 Fabrizio Torchio
A1 Susana Río Segade
A1 Mirella Giust
A1 Diego Tomasi
A1 Vincenzo Gerbi
A1 Luca Rolle
YR 2014
UL http://www.ajevonline.org/content/65/2/206.abstract
AB Flesh firmness is a sensory characteristic proposed by Organisation Internationale de la Vigne et du Vin (OIV) as an ampelographic descriptor for grape varieties and Vitis species (OIV code 235). To accurately define the flesh firmness of table grapes, an instrumental texture parameter that makes it possible to classify the five reference table-grape cultivars according to this descriptor was selected. The mechanical properties of the berry flesh were determined by texture profile analysis and cutting tests. The results showed that the berry hardness and gumminess, normalized by berry diameter, are accurate instrumental indicators of flesh firmness because the variations among the cultivars were evident, independently of berry size and maturity grade. The interquartile ranges of berry hardness normalized by berry diameter for each flesh-firmness group established by OIV (soft, slightly firm, very firm) were 0.074 to 0.117, 0.121 to 0.158, and 0.205 to 0.391 N/mm, respectively. This standardized protocol can be applied to better compare the performance of grape varieties.