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GrainGenes Reference Report: SCI-318-1446

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Reference	SCI-318-1446
Title	Boron-toxicity tolerance in barley arising from efflux transporter amplification.
Journal	Science
Year	2007
Volume	318
Pages	1446
Author	Sutton T [ Show all 11 ]
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.
External Databases	DOI:
Gene	Bot1
Germplasm	Sahara 3771 (barley) Sahara (barley)

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