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|Title:||Boron toxicity tolerance in barley arising from efflux transporter amplification|
|Citation:||Science, 2007; 318(5855):1446-1449|
|Publisher:||Amer Assoc Advancement Science|
|Organisation:||Australian Centre for Plant Functional Genomics (ACPFG)|
|Tim Sutton, Ute Baumann, Julie Hayes, Nicholas C. Collins, Bu-Jun Shi, Thorsten Schnurbusch, Alison Hay, Gwenda Mayo, Margaret Pallotta, Mark Tester and Peter Langridge|
|Abstract:||Both limiting and toxic soil concentrations of the essential micronutrient boron represent major limitations to crop production worldwide. We identified Bot1, a BOR1 ortholog, as the gene responsible for the superior boron-toxicity tolerance of the Algerian barley landrace Sahara 3771 (Sahara). Bot1 was located at the tolerance locus by high-resolution mapping. Compared to intolerant genotypes, Sahara contains about four times as many Bot1 gene copies, produces substantially more Bot1 transcript, and encodes a Bot1 protein with a higher capacity to provide tolerance in yeast. Bot1 transcript levels identified in barley tissues are consistent with a role in limiting the net entry of boron into the root and in the disposal of boron from leaves via hydathode guttation.|
|Keywords:||Saccharomyces cerevisiae; Hordeum; Plant Roots; Boron Compounds; Boron; Membrane Transport Proteins; Plant Lectins; Plant Proteins; Chromosome Mapping; Transcription, Genetic; Amino Acid Sequence; Base Sequence; Biological Transport; Genes, Plant; Quantitative Trait Loci; Molecular Sequence Data|
|Appears in Collections:||Australian Centre for Plant Functional Genomics publications|
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