Open AccessCombination of the ALCR/alcA ethanol switch and GAL4/VP16‐UAS enhancer trap system enables spatial and temporal control of transgene expression in Arabidopsis
Author(s) -
Jia Hongge,
Van Loock Bram,
Liao Mingjun,
Verbelen JeanPierre,
Vissenberg Kris
Publication year - 2007
Publication title -
plant biotechnology journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.525
H-Index - 115
eISSN - 1467-7652
pISSN - 1467-7644
DOI - 10.1111/j.1467-7652.2007.00255.x
Subject(s) - enhancer trap , enhancer , biology , transgene , reporter gene , gene , activator (genetics) , transformation (genetics) , selectable marker , multiple cloning site , microbiology and biotechnology , gene expression , expression vector , genetics , recombinant dna
Summary The experimental control of gene expression in specific tissues or cells at defined time points is a useful tool for the analysis of gene function. GAL4/VP16‐UAS enhancer trap lines can be used to selectively express genes in specific tissues or cells, and an ethanol‐inducible system can help to control the time of expression. In this study, the combination of the two methods allowed the successful regulation of gene expression in both time and space. For this purpose, a binary vector, 962‐UAS::GUS, was constructed in which the ALCR activator and β‐glucuronidase (GUS) reporter gene were placed under the control of upstream activator sequence (UAS) elements and the alcA response element, respectively. Three different GAL4/VP16‐UAS enhancer trap lines of Arabidopsis were transformed, resulting in transgenic plants in which GUS activity was detected only on ethanol induction and exclusively in the predicted tissues of the enhancer trap lines. As a library of different enhancer trap lines with distinct green fluorescent protein (GFP) patterns exist, transformation with a similar vector, in which GUS is replaced by another gene, would enable the control of the time and place of transgene expression. We have constructed two vectors for easy cloning of the gene of interest, one with a polylinker site and one that is compatible with the GATEWAY™ vector conversion system. The method can be extended to other species when enhancer trap lines become available.