期刊
SCIENTIA HORTICULTURAE
卷 216, 期 -, 页码 12-21出版社
ELSEVIER
DOI: 10.1016/j.scienta.2016.12.021
关键词
Ascorbic acid; Biosynthesis; Nutritional quality; Antioxidant; Maturity; Canopy position
类别
资金
- Postharvest Innovation Fund of the Department of Science and Technology [2/2014]
- Citrus Research International
- National Research Foundation [94022]
Citrus fruits are an important diet for human health by providing some nutritional and antioxidant components, especially ascorbic acid (AsA). As the major antioxidant compound, the concentration of AsA is an important nutritional quality indicator for citrus fruit and its derivative products. Although the emphasis is on vitamin C content of harvested citrus fruit, this review of literature focuses on preharvest factors affecting this nutritional quality variable. The literature reviewed in this study showed that the content of AsA in citrus fruits is influenced by numerous preharvest factors including genotype, cultural practices, climatic conditions, fruit maturity and postharvest management. To better understand the mechanism underlying the vitamin C content of different citrus fruits, the introduction of this paper will first provide an overview of major proposed biosynthetic pathways and genes encoding for enzymes involved in AsA biosynthesis and oxidation. The review will then concentrate on the current state of knowledge regarding inherent genetic, environmental, fertilization, maturity and harvesting factors affecting AsA of citrus fruits. Some suggestions for future research are also highlighted. (C) 2016 Elsevier B.V. All rights reserved.
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