期刊
ANTIOXIDANTS
卷 11, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/antiox11101905
关键词
red-fleshed oranges; maturation; nutritional quality; bioactive compounds; antioxidant
资金
- MCIN/AEI (Spanish Government) [RTI2018-095131-B-I00]
- ERDF A way of making Europe (European Union)
- Generalitat Valenciana, Spain [PROMETEO/2020/027]
- Generalitat Valenciana (Spain) [FDEGENT/2018/007]
This study compared red-fleshed oranges with ordinary oranges. The two types of oranges showed similar content and changes in sugars, organic acids, and vitamin C. However, mature Ruby oranges had lower concentrations of sugars, malic and succinic acid, and higher levels of citric acid compared to ordinary Valencia oranges. Additionally, Kirkwood and Ruby oranges exhibited higher lipophilic antioxidant capacity and singlet oxygen absorption capacity than ordinary oranges.
Kirkwood Navel and Ruby Valencia are two spontaneous bud-mutations of the ordinary Washington Navel and Valencia late oranges characterized by the red coloration of their flesh. The purpose of this study was to analyze the physiological features, internal fruit quality, contents of relevant bioactive compounds and antioxidant capacity in the pulps of the red-fleshed fruits compared with the ordinary oranges during late development and maturation. In general, the content of sugars, organic acids, vitamin C, tocopherols, total phenolics and flavonoids, the hydrophilic antioxidant capacity and their changes during maturation were similar in the red-fleshed oranges and in the corresponding blond oranges. However, the mature Ruby fruits contained lower concentrations of sugars, malic and succinic acid and higher levels of citric acid than the ordinary Valencia. The major difference between the pulps of the Kirkwood and Ruby oranges and those of the ordinary oranges was the higher lipophilic antioxidant capacity and SOAC (singlet oxygen absorption capacity) of the former. Together, the high and unique content and composition of carotenoids in Kirkwood and Ruby may contribute to an enhanced antioxidant capacity without any detrimental effects on other fruit-quality attributes, making these varieties good sources of phytochemicals for the fresh-fruit and juice-processing citrus industries.
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