Antioxidant Capacity and Polyphenol Content of Extracts from Crops Cultivated in Japan, and the Effect of Cultivation Environment

作者：Mikami Konishide Ichiho^*; Murakami Shiro; Nakanishi Keijiro; Takahashi Yumiko; Yamaguchi Minako; Shioya Tetsuo; Watanabe Jun; Hino Akihiro

来源：Food Science and Technology Research, 2013, 19(1): 69-79.

DOI：10.3136/fstr.19.69

• ORAC
• polyphenol content
• stem mustard (Brassica juncea) " Umino" environmental effects

Oxygen radical absorbance capacity (ORAC) value and polyphenol contents of extracts from 71 crops cultivated in Japan were determined. Hydrophilic ORAC values (H-ORAC) ranged from 194 29,830 imol TE/100 g fresh weight (FW), whereas lipophilic ORAC values (L-ORAC) ranged from 6 2,076 tanol TE/100 g FW. High total ORAC value was indicated in the following vegetables and fruits: mulukhiya (Corchorus olitorius), perilla (Perilla frutescens), water spinach (Ipomoea aquatica), edible burdock (Arctium lappa), blueberries (Vaccinium corymbosum) and hardy kiwifruit (Actinidia arguta) (6,562 -31,802 mu mol TE/100 g FW). These extracts showed a strong positive correlation between ORAC value and polyphenol content (r = 0.98). In addition, to gain a better understanding of ORAC variability in Japanese crops, we also discussed the influence of environmental factors on the ORAC value of stem mustard (Brassica juncea) "Umino" grown in three different regions. Regional variations of ORAC in stem mustard likely result from different levels of ultraviolet radiation and fertilizer application regimens specific to those regions.

• 出版日期2013-1