Managing sulphur metabolism in plants

A - Papers appearing in refereed journals

Hawkesford, M. J. and De Kok, L. J. 2006. Managing sulphur metabolism in plants. Plant, Cell and Environment. 29 (3), pp. 382-395.

AuthorsHawkesford, M. J. and De Kok, L. J.

Resolution and analysis of genes encoding components of the pathways of primary sulphur assimilation have provided the potential to elucidate how sulphur is managed by plants. Individual roles for members of gene families and regulatory mechanisms operating at gene, cellular and whole plant levels have been recognized. Sulphur is taken up and transported around the plant principally as sulphate, catalysed for the most part by a single gene family of highly regulated transporters. Additional regulation occurs in the pathway of reduction of sulphate to sulphide and its incorporation into cysteine, which occurs principally within the plastid. Cellular and whole-plant regulation of uptake, and the assimilatory pathway attempt to balance supply with demand for growth and include mechanisms for re-mobilization and redistribution of sulphur. Furthermore, optimization of sulphur assimilation requires coordination with carbon and nitrogen pathways, and multiple processes have been proposed to contribute to this balance. Present studies on cis and trans elements are focusing on transcriptional regulation, but this regulation still needs to be linked to apparent metabolite sensing. Whilst the components of the assimilatory pathways have been resolved after many years of controversy, uncertainties remain concerning roles of individual genes in gene families, their sub-cellular localization and their significance in balancing sulphur flux to sulphur demand of the plant for growth under variable environmental conditions.

KeywordsPlant Sciences
Year of Publication2006
JournalPlant, Cell and Environment
Journal citation29 (3), pp. 382-395
Digital Object Identifier (DOI)
PubMed ID17080593
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or code522
Regulation of sulphate transporter gene expression and sulphur metabolism in cereals, source-sink interactions and sulphur supply to grain tissues
Grant IDBBS/E/C/00004145

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