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

  • 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 forLeaf 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.show moreshow less

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Author:Salma BalazadehORCiDGND, Joerg Schildhauer, Wagner L. Araujo, Sergi Munne-Bosch, Alisdair R. FernieORCiDGND, Sebastian Proost, Klaus Humbeck, Bernd Müller-RöberORCiDGND
DOI:https://doi.org/10.1093/jxb/eru119
ISSN:0022-0957 (print)
ISSN:1460-2431 (online)
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=24692653
Parent Title (English):Journal of experimental botany
Publisher:Oxford Univ. Press
Place of publication:Oxford
Document Type:Article
Language:English
Year of first Publication:2014
Year of Completion:2014
Release Date:2017/03/27
Tag:Arabidopsis; gene expression; metabolomics; nitrogen limitation; senescence; transcriptome
Volume:65
Issue:14
Pagenumber:18
First Page:3975
Last Page:3992
Funder:Deutsche Forschungsgemeinschaft (DFG) [FOR 948, MU 1199/14-2, BA4769/1-2]; DFG [HU 376/13-2]; Interdisciplinary Center for Crop Plant Research (IZN), state of Saxony-Anhalt, Germany; Spanish Government [BFU2012-32057]; Max-Planck-Society
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Biochemie und Biologie
Peer Review:Referiert