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synthesis of l-ascorbic acid in the phloem韧皮部l-ascorbic酸的合成
BMC Plant Biology BioMed Central Research article Open Access Synthesis of L-ascorbic acid in the phloem Robert D Hancock, Diane McRae, Sophie Haupt and Roberto Viola* Address: Unit of Plant Biochemistry, Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, United Kingdom Email: Robert D Hancock - rhanco@scri.sari.ac.uk; Diane McRae - dmcrae@scri.sari.ac.uk; Sophie Haupt - shaupt@scri.sari.ac.uk; Roberto Viola* - rviola@scri.sari.ac.uk * Corresponding author Published: 24 November 2003 Received: 03 September 2003 Accepted: 24 November 2003 BMC Plant Biology 2003, 3:7 This article is available from: /1471-2229/3/7 © 2003 Hancock et al; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the articles original URL. Abstract Background: Although plants are the main source of vitamin C in the human diet, we still have a limited understanding of how plants synthesise L-ascorbic acid (AsA) and what regulates its concentration in different plant tissues. In particular, the enormous variability in the vitamin C content of storage organs from different plants remains unexplained. Possible sources of AsA in plant storage organs include in situ synthesis and long-distance transport of AsA synthesised in other tissues via the phloem. In this paper we examine a third possibility, that of synthesis within
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