Varietal differences in phenolic content and astringency in skin and flesh of hardy kiwifruit resources in Japan
2009
Kim, Jin Gook | Beppu, K (Kenji) | Kataoka, Ikuo
Varietal differences in the total phenolic content and astringency in the skin and flesh were determined among the cultivars and local collections of hardy kiwifruit with a ploidy variance found in Japan. The average values of the total phenolic content in the skin and flesh were 2.66 and 0.18g100g⁻¹ FW, respectively. There were large varietal differences in the total phenolic content in the skin in the range of 1.3-5.0g100g⁻¹ FW. Kochi (tetraploid), while Gassan and 'Mitsuko' (hexaploid) contained a larger amount of total phenolics. High astringency was found in Gassan, 'Mitsuko' and 'Hoko' (hexaploids) and Kochi. HPLC analysis showed that the major components of phenolics in the flesh were (+)-catechin, chlorogenic acid, rutin, (-)-epicatechin and quercetin.
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