The glucan phosphorylation mediated by α-glucan, water dikinase (GWD) is also essential in the light phase for a functional transitory starch turn-over

Plant Signaling & Behavior
Mahdi HejaziJoerg Fettke

Abstract

Starch phosphorylation mediated by the α-glucan, water dikinase (GWD) is crucial for transitory starch metabolism. The impact of the GWD action on transitory starch metabolism was analyzed in Arabidopsis mutants either lacking or revealing different reduced levels of GWD activity. In these mutants, glucose 6-phosphate (G6P) levels of the transitory leaf starch, the average leaf starch content, as well as alterations in the growth phenotype were determined under different light length conditions, including continuous light. Based on biochemical and growth phenotypical data, we found that the length of the light phase affects the phosphorylation state of the transitory starch and, by this, the average leaf starch content and the resulting growth of the plants. Additionally, we discuss data referring to an involvement of the GWD mediated glucan phosphorylation in starch synthesis, as, e.g., starch phosphorylation occurred even when a dark phase was omitted.

References

May 16, 2002·Proceedings of the National Academy of Sciences of the United States of America·Gerhard RitteMartin Steup
Dec 8, 2006·The Biochemical Journal·Samuel C ZeemanAlison M Smith
Sep 18, 2013·Plant Physiology·Marina Camara Mattos MartinsJohn Edward Lunn
Aug 1, 2004·The New Phytologist·Samuel C ZeemanAlison M Smith

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Citations

Oct 6, 2015·Journal of Proteomics·André Luis Wendt Dos SantosEny Iochevet Segal Floh
Apr 23, 2015·Current Opinion in Plant Biology·Diana SanteliaFrancesca Sparla
May 6, 2016·Cellular and Molecular Life Sciences : CMLS·Sebastian MahlowJoerg Fettke
May 12, 2016·Cellular and Molecular Life Sciences : CMLS·Barbara Pfister, Samuel C Zeeman
Mar 5, 2016·The FEBS Journal·David A MeekinsMatthew S Gentry
Nov 30, 2018·Frontiers in Plant Science·Casper WilkensMarie Sofie Møller
Aug 2, 2015·The Journal of Biological Chemistry·David A MeekinsCraig W Vander Kooi
Jul 15, 2020·Biomolecules·Henrike BrustJoerg Fettke
May 30, 2021·The Plant Journal : for Cell and Molecular Biology·Angel Mérida, Joerg Fettke

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