Characterisation of lanthanum toxicity for root growth of Arabidopsis thaliana from the aspect of natural genetic variation

Functional Plant Biology : FPB
Yuriko KobayashiHiroyuki Koyama

Abstract

The mechanism of lanthanum (La3+) toxicity on root growth of Arabidopsis was studied by physiological and genetic approaches using Landsberg erecta (Ler) × Columbia (Col) recombinant inbred lines (RILs) and other natural accessions. Quantitative trait locus (QTL) analyses revealed regulation of La3+ tolerance of the Ler × Col RILs by multiple genetic factors consisted of three significant QTLs and seven epistatic interacting loci pairs. The La content in the root tip was not correlated with La3+ tolerance in the RILs, indicating that the observed La3+ rhizotoxicity was not related to direct toxicity of La3+ in the symplast. The La3+ tolerance of root growth in the RILs was not correlated with Al3+ and Cu2+ tolerances, but was correlated with tolerances for other rare earth elements, including Gd3+, a known Ca2+ channel antagonist, and verapamil, a Ca2+ channel blocker. The genetic architecture of verapamil tolerance in root growth, which was identified by QTL analysis, was closely related to that of La3+ tolerance. La3+ tolerance and verapamil tolerance or Gd3+ tolerance in natural accessions of Arabidopsis also showed a positive correlation. These results indicate that the major La3+ toxicity on the root growth of Arabidopsis ...Continue Reading

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Citations

Nov 13, 2008·The Plant Journal : for Cell and Molecular Biology·Patrick ArmengaudAnna Amtmann
Nov 26, 2013·Environmental Science and Pollution Research International·Guang Rong HuangQing Zhou
Nov 5, 2016·Journal of Experimental Botany·Yang-Yang LiuJin Xu
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Jul 28, 2019·Environmental Monitoring and Assessment·Bárbara de Albuquerque PereiraVijay P Singh
May 29, 2019·Ecotoxicology and Environmental Safety·Manzer H SiddiquiAbdullah Alsadon

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