Boron-Toxicity Tolerance in Barley Arising from Efflux Transporter Amplification
- 30 November 2007
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 318 (5855), 1446-1449
- https://doi.org/10.1126/science.1146853
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
This publication has 16 references indexed in Scilit:
- Adoption and economic impact of improved wheat varieties in the developing worldThe Journal of Agricultural Science, 2006
- The Arabidopsis Major Intrinsic Protein NIP5;1 Is Essential for Efficient Boron Uptake and Plant Development under Boron LimitationPlant Cell, 2006
- Boron Tolerance in Barley Is Mediated by Efflux of Boron from the RootsPlant Physiology, 2004
- Arabidopsis boron transporter for xylem loadingNature, 2002
- Mapping of chromosome regions conferring boron toxicity tolerance in barley (Hordeum vulgare L.)Theoretical and Applied Genetics, 1999
- Effects of rainfall on the use of foliar analysis for diagnosing boron toxicity in field-grown wheatPlant and Soil, 1992
- Problems associated with the use of foliar analysis for diagnosing boron toxicity in barleyPlant and Soil, 1990
- Resistance to boron toxicity amongst several barley and wheat cultivars: A preliminary examination of the resistance mechanismPlant and Soil, 1988
- Toxic concentrations of boron in a red-brown earth at Gladstone, South AustraliaSoil Research, 1984
- LOSS OF BORON FROM PLANTS THROUGH GUTTATIONSoil Science, 1962