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Fruits of the genus Rosa plants are called rose hips. The common hips of R. canina are well known as a rich source of antioxidants like ascorbic acid and polyphenols. To investigate availability in the hips in Rosa spp., wild Rosa hips originating from East Asia, i.e. R. acicularis, R. davurica, R. multiflora and R. rugosa were evaluated in terms of the content of antioxidants and antioxidant ability in the hydrophilic extracts. The hips from R. glauca originating from south Europe and its interspecific hybrids (‘Kitaayaka’ and ‘Consared’), and purchased R. canina hips were also examined. In addition to the colorimetric detections of DPPH and ORAC, ESR–ST methods were employed for evaluating antioxidant ability, which can determine scavenging activities against naturally–occurring ROS i.e. superoxide anion radical (·O2–), hydroxyl radical (HO·), alkoxyl radical (RO·) and singlet oxygen (1O2), individually. The hips of R. davurica and ‘Consared’ showed quite high values in both the total content of ASA plus DHA (40.8–103.1 g/kg DW) and total polyphenols (119.2–161.5 g quercetin eq./kg DW) regardless of the years collected. They also had high antioxidant activities against each radical compared to other rose hips, and thus their antioxidant ability seems multiple. Both ASA and polyphenols could scavenge radicals of ROO· and 1O2, since significant correlations (P |
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