Cover illustration: The main photograph shows sulphur-deficiency in wheat on the Broadbalk long-term experiment at Rothamsted in southern England (MJ Hawkesford). Inset images, from the top: the diverse processes linked with plant sulphur metabolism (see Nikiforova et al., pp. 1861-1870 pale flowers of Brassica napus (oilseed rape) occurring as a result of sulphur-deficiency (MJ Hawkesford); 3-dimensional principal component analysis of microarray expression data from Broadbalk wheat indicating the large numbers of genes which are upregulated (red) or down-regulated (blue) by sulphur deficiency (C Lu, MJ Hawkesford and KJ Edwards, unpublished); localized expression of a sulphate transporter (SULTR1;2) in root epidermal layers of Arabidopsis induced by sulphur deficiency and imaged using a promoter::GFP reporter (H Takahashi).
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