Supply of nitrogen can reverse senescence processes and affect expression of genes coding for plastidic glutamine synthetase and lysine-ketoglutarate reductase/saccharopine dehydrogenase

Plant Biology
J SchildhauerK Humbeck

Abstract

Nitrogen availability has a strong influence on developmental processes in plants. We show that the time of nitrogen supply regulates the course of leaf senescence in flag leaves of Hordeum vulgare. The senescence-specific decrease in chlorophyll content and photosystem II efficiency is clearly delayed when plants are fertilised with nitrate at the onset of leaf senescence. Concurrently, the additional supply of nitrate affects expression patterns of two marker genes of nitrogen metabolism. As shown by quantitative RT-PCR analyses, senescence-specific downregulation of plastidic glutamine synthetase (GS2) and senescence-specific upregulation of lysine-ketoglutarate reductase/saccharopine dehydrogenase (LKR/SDH) are both clearly retarded. Depletion of nitrogen in experiments using hydroponic growth systems results in premature primary leaf senescence. The already started senescence processes can be even reversed by later nitrogen addition, as proved by a further increase in photosystem II efficiency and chlorophyll content, returning to the high values of controls which had not been deprived of nitrogen. Although both addition of nitrate or ammonium effectively reversed nitrogen depletion-induced primary leaf senescence, additio...Continue Reading

References

Apr 18, 2000·Experimental Gerontology·P Matile
May 10, 2003·Proceedings of the National Academy of Sciences of the United States of America·Jiman Kang, Frank J Turano
Jun 14, 2003·Plant, Cell & Environment·I. FinkemeierK.-J. Dietz
Sep 10, 2004·Plant & Cell Physiology·Kentaro TakeiHitoshi Sakakibara
Dec 21, 2006·Annual Review of Plant Biology·Pyung Ok LimHong Gil Nam
May 24, 2007·Journal of Experimental Botany·Anthony J MillerDarren M Wells
Aug 4, 2007·The Plant Journal : for Cell and Molecular Biology·Soichi KojimaNicolaus von Wirén

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Citations

Mar 1, 2010·Animal : an International Journal of Animal Bioscience·J F SoussanaV Blanfort
Mar 14, 2012·Environmental Science & Technology·Federico BrilliGeorg Wohlfahrt
Jan 1, 2015·Plants·Yemima Givaty RappGideon Grafi
Jul 21, 2015·Current Opinion in Plant Biology·Jos H M Schippers
Sep 20, 2008·Plant Biology·K Krupinska, K Humbeck
Jul 14, 2012·Journal of Integrative Plant Biology·Adinda P DerkxMalcolm J Hawkesford
Apr 3, 2014·Journal of Experimental Botany·Salma BalazadehBernd Mueller-Roeber
May 8, 2018·BMC Plant Biology·Nazeer FataftahKlaus Humbeck
Dec 29, 2020·Frontiers in Plant Science·Hongmei FanYong Wang
Feb 16, 2021·Frontiers in Plant Science·Diana HeuermannNicolaus von Wirén

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