Eukaryotic release factor 1-2 affects Arabidopsis responses to glucose and phytohormones during germination and early seedling development.

Journal of Experimental Botany
Xiangjun ZhouLi Li

Abstract

Germination and early seedling development are coordinately regulated by glucose and phytohormones such as ABA, GA, and ethylene. However, the molecules that affect plant responses to glucose and phytohormones remain to be fully elucidated. Eukaryotic release factor 1 (eRF1) is responsible for the recognition of the stop codons in mRNAs during protein synthesis. Accumulating evidence indicates that eRF1 functions in other processes in addition to translation termination. The physiological role of eRF1-2, a member of the eRF1 family, in Arabidopsis was examined here. The eRF1-2 gene was found to be specifically induced by glucose. Arabidopsis plants overexpressing eRF1-2 were hypersensitive to glucose during germination and early seedling development. Such hypersensitivity to glucose was accompanied by a dramatic reduction of the expression of glucose-regulated genes, chlorophyll a/b binding protein and plastocyanin. The hypersensitive response was not due to the enhanced accumulation of ABA. In addition, the eRF1-2 overexpressing plants showed increased sensitivity to paclobutrazol, an inhibitor of GA biosynthesis, and exogenous GA restored their normal growth. By contrast, the loss-of-function erf1-2 mutant exhibited resistanc...Continue Reading

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Citations

Jan 24, 2014·Journal of Experimental Botany·Jeroen LastdragerSjef Smeekens
Mar 11, 2011·Plant, Cell & Environment·Xiangjun ZhouL I Li
May 29, 2015·The Arabidopsis Book·Karen S Browning, Julia Bailey-Serres
Dec 3, 2014·Journal of Proteomics·MyeongWon Oh, Setsuko Komatsu
May 17, 2019·Plant & Cell Physiology·Akihiro MatsuiMotoaki Seki
Nov 7, 2013·Acta Crystallographica. Section F, Structural Biology and Crystallization Communications·Yan AnYingwu Xu

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