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. 2016 Apr 29;67(11):3551–3559. doi: 10.1093/jxb/erw174

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© The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 6. — A scheme of octulose metabolism in C. plantagineum. In hydrated conditions, octulose-8-phosphate (Oct-8-P) is synthesized through the exchange reaction that is catalysed by transketolase 7 (tkt7) and transketolase 10 (tkt10) using glucose-6-phosphate (Glu-6-P) and fructose-6-phosphate (Fru-6-P) as substrates. Oct-8-P is dephosphorylated to produce octulose (Oct). Oct can be transported from leaves to roots. In dehydrated conditions, Oct-8-P is transformed into Glu-6-P or Fru-6-P that is used to synthesize sucrose (Suc). Pi refers to phosphate. The striped arrow indicates the transport of octulose from leaves to roots. The dashed arrow only indicates the overall reaction direction (the details of the reaction are not shown).