The plastid hexokinase pHXK: a node of convergence for sugar and plastid signals in Arabidopsis

FEBS Letters
Zhong-Wei ZhangHong-Hui Lin

Abstract

The inhibitors to plastid gene expression (PGE) were effective in preventing nuclear photosynthetic gene expression only if applied within the first 2-3 days of Arabidopsis seedling development. However, the signal transduction processes are still unknown. In this investigation, we found 3% glucose with 1mM chloramphenicol co-treatment repressed LHCB transcript significantly in mature Arabidopsis seedlings, while effective solo glucose treatment needed a concentration of 7%. The repressive effects of glucose and chloramphenicol on LHCB expression were inhibited in phxk (plastid hexokinase) mutant. pHXK enzyme activities, location, function in signal transduction, and cross talk to plastid GUN1 protein (a key signaling factor) were also investigated. The data suggest that pHXK may be a node of convergence for sugar-mediated and PGE-derived signals in Arabidopsis.

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Citations

Feb 9, 2012·Plant Physiology·Hongchang CuiDanyu Kong
Dec 23, 2014·Journal of Plant Biology = Singmul Hakhoe Chi·Jen Sheen
Oct 5, 2014·Journal of Experimental Botany·Elizabeth CordobaPatricia León
Sep 6, 2011·Plant Science : an International Journal of Experimental Plant Biology·Ravi Valluru, Wim Van den Ende
Nov 4, 2015·Frontiers in Plant Science·Jian-Ping HuangAlan M Jones
Jun 16, 2011·Plant Signaling & Behavior·Amanda Cottage, John C Gray
Jan 13, 2015·Journal of Experimental Botany·Karl-Josef Dietz
Jul 17, 2016·Current Opinion in Plant Biology·Lei Li, Jen Sheen
Apr 28, 2017·Plant & Cell Physiology·G Paulina Aguilera-Alvarado, Sobeida Sánchez-Nieto
May 31, 2017·Plant, Cell & Environment·Zhong-Wei ZhangYi-Kun He

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