Abstract
The thiol tripeptide, glutathione (GSH) is an essential redox metabolite in plant cells but little information is available concerning GSH partitioning between the cytosol and nucleus. In this article we discuss the evidence concerning the distribution of GSH between the nucleus and the cytosol. The glutathione redox potential was similar in the nucleus and cytosol of developing radicles of Arabidopsis thaliana seeds after germination. However, in the arrested embryonic root meristem of the root meristemless 1 (rml1) mutant that have less than 5 % GSH of the wild type, GSH was predominantly localised in the nuclei. This was also the case in wild type roots treated with the auxin transport inhibitor, N-1-napthylphthalamic acid (NPA), which have decreased root glutathione levels. GSH was co-localised with nuclear DNA at G1 and G2 in A. thaliana cultures in which the cell cycle was synchronised. The functions of GSH are considered in terms of cell cycle regulation and the regulation of gene expression.
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Acknowledgements
This work was funded by EU FP7: KBBE-2012-6-311840 (ECOSEED: ADS). PDV acknowledges the CSIC and the Spanish Ministry of Economy and Competitiveness for his ‘Ramon & Cajal’ research contract, co-financed by FEDER funds. YPD thanks the China Scholarship Council (China) for a scholarship.
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De Simone, A., Dong, Y., Vivancos, P.D., Foyer, C.H. (2015). GSH Partitioning Between the Nucleus and Cytosol in Arabidopsis thaliana . In: De Kok, L., Hawkesford, M., Rennenberg, H., Saito, K., Schnug, E. (eds) Molecular Physiology and Ecophysiology of Sulfur. Proceedings of the International Plant Sulfur Workshop. Springer, Cham. https://doi.org/10.1007/978-3-319-20137-5_4
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DOI: https://doi.org/10.1007/978-3-319-20137-5_4
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