PMID: 11912223Mar 26, 2002Paper

What stay-green mutants tell us about nitrogen remobilization in leaf senescence

Journal of Experimental Botany
H. ThomasIain Donnison

Abstract

Leaf senescence has an important role in the plant's nitrogen economy. Chlorophyll catabolism is a visible symptom of protein mobilization. Genetic and environmental factors that interfere with yellowing tend to modify protein degradation as well. The chlorophyll-protein relationship is much closer for membrane proteins than it is for soluble or total leaf proteins. In stay-greens, genotypes with a specific defect in the chlorophyll catabolism pathway, soluble protein degradation during senescence may be close to normal, but light-harvesting and reaction centre thylakoid membrane proteins are much more stable. Genes for the chlorophyll catabolism pathway and its control are important in the regulation of protein mobilization. Genes for three steps in the pathway are reported to have been isolated. The gene responsible for the stay-green phenotype in grasses and legumes has not yet been cloned but a fair amount is known about it. Pigment metabolism in senescing leaves of the Festuca-Lolium stay-green mutant is clearly disturbed and is consistent with a blockage at the ring-opening (PaO) step in chlorophyll breakdown. PaO is de novo synthesized in senescence and thought to be the key enzyme in the chlorophyll a catabolic pathway....Continue Reading

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Citations

Jun 19, 2013·Photosynthesis Research·Makoto KusabaRyouichi Tanaka
Jun 14, 2003·Plant Physiology·Emile J M ClerkxMaarten Koornneef
May 22, 2007·The Plant Cell·So-Yon ParkNam-Chon Paek
Jul 10, 2009·Yi chuan = Hereditas·Dian-Yi ShiWei-Wei Jin
Mar 7, 2014·Journal of Experimental Botany·Howard Thomas, Helen Ougham
May 9, 2007·Journal of Plant Physiology·Hilda Araceli Zavaleta-ManceraHelen Ougham
Jul 15, 2009·The New Phytologist·Neil JonesIzolda Pašakinskienė
Aug 24, 2007·The Plant Journal : for Cell and Molecular Biology·Huawu JiangGuojiang Wu
Jun 16, 2014·Bulletin of Environmental Contamination and Toxicology·Xuqiang QiaoHaiyan Yang
Oct 21, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·R Suzuky PintoMatthew P Reynolds
Sep 15, 2005·Journal of Experimental Botany·Astrid WinglerNathalie Pourtau
Jan 25, 2020·Journal of Food Science and Technology·Ítalo Careli-GondimManoel Soares Soares Júnior
Nov 14, 2019·Plants·Martín L MaytaAnabella F Lodeyro
Feb 1, 2013·Functional Plant Biology : FPB·Juan Pablo GiraldoN Michele Holbrook
Sep 6, 2017·The Plant Journal : for Cell and Molecular Biology·Zhongpeng LiBenke Kuai
Nov 10, 2020·Plant Physiology and Biochemistry : PPB·Minmin YangWei Lv

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