Glycine-Rich RNA-Binding Protein AtGRP7 Functions in Nickel and Lead Tolerance in Arabidopsis

Plant glycine-rich RNA-binding proteins (GRPs) play crucial roles in the response to environmental stresses. However, the functions of in plants under heavy metal stress remain unclear. In the present study, in , the transcript level of was markedly increased by Ni but was decreased by Pb. -overexpr...

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Bibliographic Details
Published in:Plants (Basel) 2024-01, Vol.13 (2), p.187
Main Authors: Kim, Yeon-Ok, Safdar, Mahpara, Kang, Hunseung, Kim, Jangho
Format: Article
Language:English
Subjects:
Accumulation
antioxidant enzyme
Antioxidants
Arabidopsis
Arabidopsis thaliana
AtGRP7
Chelating agents
Comparative analysis
Environmental aspects
Environmental conditions
Environmental stress
Enzymes
Gene regulation
Genes
Genetic aspects
Glutathione
Glutathione synthase
Glycine
heavy metal tolerance
Heavy metals
Identification and classification
Lead
Metabolism
Metallothionein
mRNA stability
Nickel
Oxidative stress
Physiological aspects
Phytochelatin synthase
Plant growth
Post-transcription
Proteins
Ribonucleic acid
RNA
RNA-binding protein
Salinity
Toxicity
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Summary:Plant glycine-rich RNA-binding proteins (GRPs) play crucial roles in the response to environmental stresses. However, the functions of in plants under heavy metal stress remain unclear. In the present study, in , the transcript level of was markedly increased by Ni but was decreased by Pb. -overexpressing plants improved Ni tolerance, whereas the knockout mutant ( ) was more susceptible than the wild type to Ni. In addition, showed greatly enhanced Pb tolerance, whereas overexpression lines showed high Pb sensitivity. Ni accumulation was reduced in overexpression lines but increased in , whereas Pb accumulation in was lower than that in overexpression lines. Ni induced glutathione synthase genes and in overexpression lines, whereas Pb increased metallothionein genes and and phytochelatin synthase genes and in . Furthermore, Ni increased and in , whereas Pb significantly induced and in overexpression lines. The mRNA stability of and was directly regulated by AtGRP7 under Ni and Pb, respectively. Collectively, these results indicate that plays a crucial role in Ni and Pb tolerance by reducing Ni and Pb accumulation and the direct or indirect post-transcriptional regulation of genes related to heavy metal chelators and antioxidant enzymes.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants13020187