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J Exp Bot. 2014 Jul;65(14):3975-92. doi: 10.1093/jxb/eru119. Epub 2014 Apr 1.

Reversal of senescence by N resupply to N-starved Arabidopsis thaliana: transcriptomic and metabolomic consequences.

Author information

1
University of Potsdam, Institute of Biochemistry and Biology, Karl-Liebknecht-Straße 24-25, Haus 20, D-14476 Potsdam-Golm, Germany Max-Planck Institute of Molecular Plant Physiology, Plant Signalling Group, Am Muehlenberg 1, D-14476 Potsdam-Golm, Germany.
2
Martin-Luther-University Halle-Wittenberg, Institute of Biology, Weinbergweg 10, D-06120 Halle, Germany.
3
Max-Planck Institute of Molecular Plant Physiology, Central Metabolism Group, Am Muehlenberg 1, D-14476 Potsdam-Golm, Germany Max-Planck Partner Group at the Departamento de Biologia Vegetal, Universidade Federal de Viçosa, 36570-000 Viçosa, MG, Brasil.
4
Departament de Biologia Vegetal, Universitat de Barcelona, Facultat de Biologia, 08028 Barcelona, Spain.
5
Max-Planck Institute of Molecular Plant Physiology, Central Metabolism Group, Am Muehlenberg 1, D-14476 Potsdam-Golm, Germany.
6
Martin-Luther-University Halle-Wittenberg, Institute of Biology, Weinbergweg 10, D-06120 Halle, Germany bmr@uni-potsdam.de klaus.humbeck@pflanzenphys.uni-halle.de.
7
University of Potsdam, Institute of Biochemistry and Biology, Karl-Liebknecht-Straße 24-25, Haus 20, D-14476 Potsdam-Golm, Germany Max-Planck Institute of Molecular Plant Physiology, Plant Signalling Group, Am Muehlenberg 1, D-14476 Potsdam-Golm, Germany bmr@uni-potsdam.de klaus.humbeck@pflanzenphys.uni-halle.de.

Abstract

Leaf senescence is a developmentally controlled process, which is additionally modulated by a number of adverse environmental conditions. Nitrogen shortage is a well-known trigger of precocious senescence in many plant species including crops, generally limiting biomass and seed yield. However, leaf senescence induced by nitrogen starvation may be reversed when nitrogen is resupplied at the onset of senescence. Here, the transcriptomic, hormonal, and global metabolic rearrangements occurring during nitrogen resupply-induced reversal of senescence in Arabidopsis thaliana were analysed. The changes induced by senescence were essentially in keeping with those previously described; however, these could, by and large, be reversed. The data thus indicate that plants undergoing senescence retain the capacity to sense and respond to the availability of nitrogen nutrition. The combined data are discussed in the context of the reversibility of the senescence programme and the evolutionary benefit afforded thereby. Future prospects for understanding and manipulating this process in both Arabidopsis and crop plants are postulated.

KEYWORDS:

Arabidopsis; gene expression; metabolomics; nitrogen limitation; senescence; transcriptome.

PMID:
24692653
PMCID:
PMC4106441
DOI:
10.1093/jxb/eru119
[Indexed for MEDLINE]
Free PMC Article

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