期刊
PLANT SCIENCE
卷 207, 期 -, 页码 2-11出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.plantsci.2013.02.007
关键词
Capsicum annuum L.; Vitamin C; L-Ascorbic acid; Fruit ripening; Bioactive compound; Gene expression
资金
- Ministerio de Ciencia e Innovacion, Spain [AGL 2009-11558, FUN-C-FOOD CSD2007-00063]
- Generalitat Valenciana [GVA/2012/036, PROMETEO2010/010]
- JAE-Doc (CSIC)
Sweet pepper (Capsicum annuum L) is widely recognized among the vegetables with high content of ascorbic acid (AsA). However, the metabolic pathways involved in the biosynthesis, recycling and degradation of AsA and their relative contribution to the concentration of AsA have not been established yet. In the present work, the expression levels of selected genes involved in the AsA biosynthesis, degradation and recycling pathways were analyzed during development and ripening of pepper fruit cv. Palermo and in mature fruit of four cultivars (Lipari, C-116, Surrentino and Italverde) with different AsA concentrations. An inverse correlation was found between the expression of the biosynthetic genes and AsA concentrations, which could indicate that a feedback mechanism regulates AsA homeostasis in pepper fruits. Interestingly, analysis of mRNA levels of ascorbate oxidase, involved in the degradation of AsA, suggests that this enzyme plays a critical role in the regulation of the AsA pool during fruit development and ripening. (C) 2013 Elsevier Ireland Ltd. All rights reserved.
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