Major polyphenols in two cultivars of Japanese pear harvested during from June to September were determined and quantified, and the relationship between radical scavenging activity and polyphenol contents was assessed. Arbutin and chlorogenic acid were identified as the major polyphenols in the fruits of cultivars Kosui and Hosui. High levels of polyphenols accumulated during fructification and decreased with maturity ; however, the absolute amounts per fruit increased with time. Arbutin and chlorogenic acid were found primarily in the skin, followed by the core, of the mature fruits. It was deduced that polyphenol accumulation occurred in areas important for protecting both the fruit body from UV radiation and the seeds from oxidative stress.
Shonai persimmon is the common name for persimmons cultivated in the Shonai area of Yamagata Prefecture, Japan. They are also known as the cultivar Hiratanenashi (Diospyros kaki L.) and are one of the region
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