Journal article published in American Journal of Enology and Viticulture, volume 62, pp. 49–56.

Authors: Luca Rolle, Simone Giacosa, Vincenzo Gerbi and Vittorino Novello.

Abstract

The present study was carried out to compare ten white table grape varieties (Delizia del Vaprio, Matilde, Moscato di Terracina, Pansé precoce, Pizzutello bianco, Regina, Regina dei vigneti, Sublima seedless, Sultanina or Thompson seedless, Vincere) for their texture, color and chemical characteristics. It has been demonstrated in the literature that the consumer acceptability of table grapes depends on such factors as visual attributes, chemical constituents, nutritive values, mechanical properties and, obviously, sensory attributes, which are affected by the cultivar. In fact, notable differences among the studied varieties were found in the CIRG color index, solid soluble contents, malic acid, hydroxycinnamic acid and in the amount of total polyphenols. However, the mechanical parameters of berries, as determined by Texture Profile Analysis (TPA), and berry skin characteristics, evaluated by puncture testing, were the most important properties for the differentiation of varieties. In particular, PCA analysis indicates that Hardness, Gumminess, Chewiness, Break skin force, Break skin energy, Young's modulus of elasticity of skin were the best indices with which to characterize the varieties. Therefore, this newly acquired knowledge may be of interest to many operators in the viticulture and postharvest sectors, including breeders, in order to recognize the behavior of each variety and to satisfy the requirements of the market.

Key words table grapes; texture profile analysis; mechanical properties; skin hardness; CIRG; polyphenols

BibTeX entry: click to show

@article{
	2318_88202,
	url = {https://hdl.handle.net/2318/88202},
	author = {Rolle, Luca and Giacosa, Simone and Gerbi, Vincenzo and Novello, Vittorino},
	title = {Comparative study of texture properties, color characteristics and chemical composition of ten white table grape varieties},
	year = {2011},
	journal = {American Journal of Enology and Viticulture},
	volume = {62},
	abstract = {The present study was carried out to compare ten white table grape varieties (Delizia del Vaprio, Matilde, Moscato di Terracina, Pansé precoce, Pizzutello bianco, Regina, Regina dei vigneti, Sublima seedless, Sultanina or Thompson seedless, Vincere) for their texture, color and chemical characteristics. It has been demonstrated in the literature that the consumer acceptability of table grapes depends on such factors as visual attributes, chemical constituents, nutritive values, mechanical properties and, obviously, sensory attributes, which are affected by the cultivar. In fact, notable differences among the studied varieties were found in the CIRG color index, solid soluble contents, malic acid, hydroxycinnamic acid and in the amount of total polyphenols. However, the mechanical parameters of berries, as determined by Texture Profile Analysis (TPA), and berry skin characteristics, evaluated by puncture testing, were the most important properties for the differentiation of varieties. In particular, PCA analysis indicates that Hardness, Gumminess, Chewiness, Break skin force, Break skin energy, Young's modulus of elasticity of skin were the best indices with which to characterize the varieties. Therefore, this newly acquired knowledge may be of interest to many operators in the viticulture and postharvest sectors, including breeders, in order to recognize the behavior of each variety and to satisfy the requirements of the market.},
	keywords = {table grapes; texture profile analysis; mechanical properties; skin hardness; CIRG; polyphenols},
	doi = {10.5344/ajev.2010.10029},
	pages = {49--56}
}

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