The control of boron accumulation by two genotypes of wheat |
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| Authors: | Garnett Trevor P Tester Mark A Nable Ross O |
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| Institution: | (1) CSIRO Division of Soils, Glen Osmond, SA;(2) Present address: CRC for Temperate Hardwood Forestry, Locked Bag 2, P.O., 7005 Sandy Bay, Tasmania;(3) Present address: Department of Plant Sciences, University of Cambridge, UK;(4) Present address: CSIRO Division of Soils, Townsville, QLD |
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| Abstract: | The mechanism of boron (B) uptake in wheat was studied using two genotypes with known differences in their ability to accumulate B. Influx and efflux of B was measured in the roots of intact 21 d old plants.Roots grown in 15  M B, when transferred to solutions containing 1mM B showed a rapid increase in B content for up to 60 min, after which no further increase was evident up to 4 h. No genotypic difference in B influx was apparent over these time periods. Roots grown in 1mM B for 7 d and then rinsed in B-free solutions quickly lost most of B that they contained within 1 hour; little further efflux was observed over the following three hours. As with the influx, no genotypic difference in B flux was evident.It is suggested that the lack of genotypic difference in the short-term B fluxes could be due to a masking effect of extracellular B bound in the cell walls of the roots.Department of Botany, University of Adelaide |
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| Keywords: | boron wheat Triticum aestivum L uptake genotypic variation toxicity |
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