Metabolite transport and associated sugar signalling systems underpinning source/sink interactions

A - Papers appearing in refereed journals

Griffiths, C. A., Paul, M. J. and Foyer, C. H. 2016. Metabolite transport and associated sugar signalling systems underpinning source/sink interactions. Biochimica et Biophysica Acta (BBA) - Bioenergetics. 1857 (10), pp. 1715-25.

AuthorsGriffiths, C. A., Paul, M. J. and Foyer, C. H.

Metabolite transport between organelles, cells and source and sink tissues not only enables pathway co-ordination but it also facilitates whole plant communication, particularly in the transmission of information concerning resource availability. Carbon assimilation is co-ordinated with nitrogen assimilation to ensure that the building blocks of biomass production, amino acids and carbon skeletons, are available at the required amounts and stoichiometry, with associated transport processes making certain that these essential resources are transported from their sites of synthesis to those of utilisation. Of the many possible posttranslational mechanisms that might participate in efficient co-ordination of metabolism and transport only reversible thiol-disulphide exchange mechanisms have been described in detail. Sucrose and trehalose metabolism are intertwined in the signalling hub that ensures appropriate resource allocation to drive growth and development under optimal and stress conditions, with trehalose-6-phosphate acting as an important signal for sucrose availability. The formidable suite of plant metabolite transporters provides enormous flexibility and adaptability in inter-pathway coordination and source-sink interactions. Focussing on the carbon metabolism network, we highlight the functions of different transporter families, and the important of thioredoxins in the metabolic dialogue between source and sink tissues. In addition, we address how these systems can be tailored for crop improvement.

KeywordsPhloem loading; Redox regulation; Source-sink interactions; Sucrose transporters; Sugar signalling; Trehalose
Year of Publication2016
JournalBiochimica et Biophysica Acta (BBA) - Bioenergetics
Journal citation1857 (10), pp. 1715-25
Digital Object Identifier (DOI)
PubMed ID27487250
PubMed Central IDPMC5001786
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeWheat
Increasing wheat drought tolerance and recovery throughout the life cycle through regulation of plant growth mechanisms
[20:20 Wheat] Maximising yield potential of wheat
Publisher's version
Output statusPublished
Publication dates
Online31 Jul 2016
Publication process dates
Accepted23 Jul 2016
Copyright licenseCC BY

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