Boron response in wheat is genotype-dependent and related to boron uptake, translocation, allocation, plant phenological development and growth rate

Functional Plant Biology : FPB
Monika A WimmerAndré Läuchli

Abstract

Wheat genotypes often differ significantly in their response to low and high boron (B) supply, although the underlying mechanisms for such differences are poorly understood. The stable isotopes 10B and 11B were used to investigate the contribution of root retention, uptake rates, translocation and allocation of B within wheat (Triticum aestivum L.) genotypes known to differ in B response. At high B supply, the tolerant GREEK had reduced B concentrations in main shoot leaves associated with lower uptake rates and increased allocation of B to tillers. The equally tolerant BT-SCHOMBURGK exhibited high uptake rates, but accumulation was low because of rapid development, lower concentrations of soluble B in the cell sap and lower B translocation to the shoot. In WlMMC, high uptake rates, slow development, high translocation and allocation to main shoots resulted in high B accumulation and poor tolerance. Retention in roots was not substantial in any of the genotypes. The results suggest that B tolerance is multi-faceted and genotype specific. Mechanisms contributing to B tolerance include reduced uptake rates and differential translocation and allocation within plants. Additionally, plant growth rate and leaf morphology can influenc...Continue Reading

Citations

May 6, 2008·Journal of Environmental Quality·I A M YunusaS P Nissanka
Mar 8, 2020·Plants·Teresa Fuertes-MendizábalMª Begoña González-Moro
Oct 1, 2006·Functional Plant Biology : FPB·Sukhjiwan KaurPaul W J Taylor
Dec 18, 2008·Genome Génome / Conseil National De Recherches Canada·Thorsten SchnurbuschTim Sutton

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