Characterization of the snowy cotyledon 1 mutant of Arabidopsis thaliana: the impact of chloroplast elongation factor G on chloroplast development and plant vitality

Plant Molecular Biology
Verónica AlbrechtKlaus Apel

Abstract

During seedling development chloroplast formation marks the transition from heterotrophic to autotrophic growth. The development and activity of chloroplasts may differ in cotyledons that initially serve as a storage organ and true leaves whose primary function is photosynthesis. A genetic screen was used for the identification of genes that affect selectively chloroplast function in cotyledons of Arabidopsis thaliana. Several mutants exhibiting pale cotyledons and green true leaves were isolated and dubbed snowy cotyledon (sco). One of the mutants, sco1, was characterized in more detail. The mutated gene was identified using map-based cloning. The mutant contains a point mutation in a gene encoding the chloroplast elongation factor G, leading to an amino acid exchange within the predicted 70S ribosome-binding domain. The mutation results in a delay in the onset of germination. At this early developmental stage embryos still contain undifferentiated proplastids, whose proper function seems necessary for seed germination. In light-grown sco1 seedlings the greening of cotyledons is severely impaired, whereas the following true leaves develop normally as in wild-type plants. Despite this apparent similarity of chloroplast developm...Continue Reading

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Citations

Apr 24, 2007·Plant Molecular Biology·Reiko MotohashiKazuo Shinozaki
Sep 23, 2010·Plant Molecular Biology·Zach AdamZiv Reich
May 25, 2013·Photosynthesis Research·Aarthi PutarjunanSteve Rodermel
Aug 23, 2008·Plant & Cell Physiology·Sunok MoonGynheung An
Feb 19, 2011·Plant Physiology·Barry J Pogson, Verónica Albrecht
Nov 26, 2013·Journal of Biochemistry·Takuma SuematsuYoh-ichi Watanabe
Feb 3, 2016·Frontiers in Plant Science·Kathleen DelfosseJaideep Mathur
Dec 20, 2015·Journal of Experimental Botany·Xuwu SunDario Leister
Sep 12, 2009·The EMBO Journal·Mark T Waters, Jane A Langdale
Mar 24, 2007·Proteomics·Makoto Hashimoto, Setsuko Komatsu
Nov 30, 2011·Physiologia Plantarum·Raik WagnerChristiane Funk
May 30, 2012·The Plant Journal : for Cell and Molecular Biology·Jiang ZhangRalph Bock
Jul 30, 2010·Journal of Integrative Plant Biology·Xiayan LiuSteve Rodermel
Sep 17, 2013·Journal of Integrative Plant Biology·Tuan LongXianghua Li
Feb 11, 2015·Biochimica Et Biophysica Acta·Barry J PogsonVerónica Albrecht-Borth
Mar 5, 2014·Molecular Plant·Nadine Tiller, Ralph Bock
Sep 15, 2010·Bio Systems·Henning TschierschHardy Rolletschek

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