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GrainGenes Reference Report: GNM-47-526

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Reference	GNM-47-526
Title	Phylogeny and expression of paralogous and orthologous sulphate transporter genes in diploid and hexaplold wheats
Journal	Genome
Year	2004
Volume	47
Pages	526-534
Author	Buchner P Prosser IM Hawkesford MJ
Abstract	Twelve genes encoding two closely related subtypes (ST1.1a and ST1.1b) of a sulfate transporter have been identified in the diploid wheats Aegilops tauschii, Triticum urartu, and A. speltoides, as well as the hexaploid T. aestivum. Based on phylogenetic comparisons with other plant sulfate transporters, the ST1.1a and 1.1b subtypes aligned with group 1 of the plant sulfate transporter gene family. The exon-intron structure was conserved within the ST1.1a or ST1.1b genes; however, substantial variability in intron sequences existed between the two types. The high overall sequence similarity indicated that ST1.1b represented a duplication of the ST1.1a gene, which must have occurred before the evolution of the ancestral diploid wheat progenitor. In contrast with the close relationship of the T. urartu and A. tauschii sequences to the corresponding A and D genome sequences of T. aestivum, the divergence between the A. speltoides sequences and the B genome sequences suggested that the B genome ST1.1a gene has been modified by recombination. Transcript analysis revealed predominant expression of the ST1.1a type and an influence of sulfur availability on the level of expression
External Databases	Pubmed: 15190370
Keyword	aegilops [ Show all 18 ]

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