Leaf senescence induced by EGY1 defection was partially restored by glucose in Arabidopsis thaliana

Botanical Studies
Cuiyun ChenXin Zhao

Abstract

Ethylene-dependent gravitropism-deficient and yellow-green 1 (EGY1) protein is required for chloroplast development and photosynthesis conduction. The egy1 deletion mutants have a yellow-green phenotype and reduced granal thylakoids. Furthermore, the yellow-green phenotype of egy1 mutants is more obvious than that of wild-type (WT) plants with increasing leaf age, suggesting an early senescence in the egy1 mutants. However, the relationship between EGY1 functions and leaf senescence still remains poorly understood. We observed that egy1 mutant leaves were more yellow than those of WT (the same age) in Arabidopsis thaliana. In accompany with this phenotype, leaf survival, chlorophyll content, Fv/Fm and soluble protein content decreased, and ion leakage increased significantly in egy1 mutants compared to WT plants. At molecular level, the expressions of senescence-associated genes increased, and photosynthesis genes decreased significantly in the mutants compared to those in WT plants. Furthermore, after darkness treatment, the yellow-green phenotype of egy1 mutants was more obvious than that of WT. These results indicate that the loss-of-function of egy1 gene induces leaf senescence in A. thaliana. In addition, our results showe...Continue Reading

References

Jan 1, 1997·The Plant Cell·J C JangJ Sheen
Mar 9, 1999·The Plant Journal : for Cell and Molecular Biology·S J Clough, A F Bent
Oct 13, 2001·Current Opinion in Plant Biology·S Gazzarrini, P McCourt
Mar 26, 2002·Journal of Experimental Botany·Stefan Hörtensteiner, Urs Feller
Jun 19, 2002·The Journal of Biological Chemistry·Jed H DoellingRichard D Vierstra
Feb 25, 2003·Journal of Experimental Botany·Luis A del RíoBarbara A Zilinskas
Jun 24, 2003·Trends in Plant Science·Pyung Ok LimHong Gil Nam
Jan 22, 2005·The Plant Journal : for Cell and Molecular Biology·Gu ChenNing Li
Dec 7, 2006·Plant Biotechnology Journal·Vicky Buchanan-WollastonDavid Pink
Mar 8, 2007·Photosynthesis Research·Maneesha R AluruSteven R Rodermel
Jan 24, 2008·Journal of Experimental Botany·Keqiang WuVijaya Chaikam
May 6, 2008·Journal of Experimental Botany·Wouter G van Doorn
May 1, 2008·Plant Signaling & Behavior·Rajagopal BalasubramanianBrandon D Moore
Feb 19, 2010·Journal of Experimental Botany·Pyung Ok LimHong Gil Nam
Apr 8, 2010·Comptes rendus biologies·Anne GuiboileauCéline Masclaux-Daubresse

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Methods Mentioned

BETA
PCR
protein assay
X-ray

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