ArticlePlant physiology2004
Boron tolerance in barley is mediated by efflux of boron from the roots.
Article in Plant physiology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.
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Who cites it
37 citing papers in PubMed.
- Boron toxicity, tolerance, and accumulation potential in halophyte and salt-tolerant species.Planta · 2026Review
- Calcium-L-aspartate nanoparticles mitigate Boron toxicity in rice seedlings by modulating physiological, antioxidant, and cell wall mechanisms.Scientific reports · 2025Article
- Single-cell transcriptional profiling in Arabidopsis root exposed to boron toxicity at seedling stages.Plant molecular biology · 2025Article
- Transport and regulatory mechanisms of boron in plants.Frontiers in plant science · 2025Review
- Nutrient Homeostasis of Aegilops Accessions Differing in B Tolerance Level under Boron Toxic Growth Conditions.Biology · 2022Article
- CsiLAC4 modulates boron flow in Arabidopsis and Citrus via high-boron-dependent lignification of cell walls.The New phytologist · 2022Article
- Evaluating Variation in Germination and Growth of Landraces of Barley (Frontiers in plant science · 2022Article
- Molecular characterization of the genome-wideFrontiers in plant science · 2022Article
- Variability in Physiological Traits Reveals Boron Toxicity Tolerance in Aegilops Species.Frontiers in plant science · 2021Article
- Plant transporters involved in combating boron toxicity: beyond 3D structures.Biochemical Society transactions · 2020Review
- Nitrogen Assimilation in the Highly Salt- and Boron-Tolerant EcotypePlants (Basel, Switzerland) · 2020Article
- Boron Toxicity and Deficiency in Agricultural Plants.International journal of molecular sciences · 2020Review
- Combined Boron Toxicity and Salinity Stress-An Insight into Its Interaction in Plants.Plants (Basel, Switzerland) · 2019Review
- Boron tolerance and accumulation potential of four salt-tolerant plant species.Scientific reports · 2019Article
- Genetic Diversity Linked to Haplotype Variation in the World Core Collection ofFrontiers in plant science · 2019Article
- Molecular characterization of the genome-wide BOR transporter gene family and genetic analysis of BnaC04.BOR1;1c in Brassica napus.BMC plant biology · 2018Article
- Altered Expression of a Malate-Permeable Anion Channel, OsALMT4, Disrupts Mineral Nutrition.Plant physiology · 2017Article
- The Combined Action of Duplicated Boron Transporters Is Required for Maize Growth in Boron-Deficient Conditions.Genetics · 2017Article
- Article
- Genetic factors underlying boron toxicity tolerance in rice: genome-wide association study and transcriptomic analysis.Journal of experimental botany · 2017Article
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Many plants are known to reduce the toxic effects of high soil boron (B) by reducing uptake of B, but no mechanism for limiting uptake has previously been identified. The B-tolerant cultivar of barley (Hordeum vulgare L.), Sahara, was shown to be able to maintain root B concentrations up to 50% lower than in the B-sensitive cultivar, Schooner. This translated into xylem concentrations that were approximately 64% lower and leaf concentrations 73% lower in the tolerant cultivar. In both cultivars, B accumulation was rapid and reached a steady-state concentration in roots within 3 h. In Schooner, this concentration was similar to the external medium, whereas in Sahara, the root concentration was maintained at a lower concentration. For this to occur, B must be actively extruded from the root in Sahara, and this is presumed to be the basis for B tolerance in barley. The extrusion mechanism was inhibited by sodium azide but not by treatment at low temperature. Several anion channel inhibitors were also effective in limiting extrusion, but it was not clear whether they acted directly or via metabolic inhibition. The ability of Sahara to maintain lower root B concentrations was constitutive and occurred across a wide range of B concentrations. This ability was lost at high pH, and both Schooner and Sahara then had similar root B concentrations. A predictive model that is consistent with the empirical results and explains the tolerance mechanism based on the presence of a borate anion efflux transporter in Sahara is presented.
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