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Flexible Tools for Gene Expression and Silencing in Tomato

Authors: Fernández, Ana I.; Viron, Nicolas; Alhagdow, Moftah; Karimi, Mansour; Jones, Matthew; Amsellem, Ziva; Sicard, Adrien; +9 Authors

Flexible Tools for Gene Expression and Silencing in Tomato

Abstract

Abstract As a genetic platform, tomato (Solanum lycopersicum) benefits from rich germplasm collections and ease of cultivation and transformation that enable the analysis of biological processes impossible to investigate in other model species. To facilitate the assembly of an open genetic toolbox designed to study Solanaceae, we initiated a joint collection of publicly available gene manipulation tools. We focused on the characterization of promoters expressed at defined time windows during fruit development, for the regulated expression or silencing of genes of interest. Five promoter sequences were captured as entry clones compatible with the versatile MultiSite Gateway format: PPC2, PG, TPRP, and IMA from tomato and CRC from Arabidopsis (Arabidopsis thaliana). Corresponding transcriptional fusions were made with the GUS gene, a nuclear-localized GUS-GFP reporter, and the chimeric LhG4 transcription factor. The activity of the promoters during fruit development and in fruit tissues was confirmed in transgenic tomato lines. Novel Gateway destination vectors were generated for the transcription of artificial microRNA (amiRNA) precursors and hairpin RNAs under the control of these promoters, with schemes only involving Gateway BP and LR Clonase reactions. Efficient silencing of the endogenous phytoene desaturase gene was demonstrated in transgenic tomato lines producing a matching amiRNA under the cauliflower mosaic virus 35S or PPC2 promoter. Lastly, taking advantage of the pOP/LhG4 two-component system, we found that well-characterized flower-specific Arabidopsis promoters drive the expression of reporters in patterns generally compatible with heterologous expression. Tomato lines and plasmids will be distributed through a new Nottingham Arabidopsis Stock Centre service unit dedicated to Solanaceae resources.

Keywords

Molecular Plant Physiology, Arabidopsis, POLYGALACTURONASE, 630, CRABS-CLAW, Solanum lycopersicum, Gene Expression Regulation, Plant, Genes, Reporter, [SDV.GEN.GPL] Life Sciences [q-bio]/Genetics/Plants genetics, TRANSCRIPTION, Cloning, Molecular, Promoter Regions, Genetic, Glucuronidase, ZINC-FINGER, crabs-claw, plants, Faculty of Science\Biological Science, ARABIDOPSIS, Genetic Techniques, Organ Specificity, transcription, SEQUENCE TAGS, sequence tags, Transcriptional Activation, 570, 572, functional-analysis, Genetic Vectors, Green Fluorescent Proteins, polygalacturonase, [SDV.GEN.GPL]Life Sciences [q-bio]/Genetics/Plants genetics, Species Specificity, PLANTS, zinc-finger, Gene Silencing, artificial micrornas, Cell Nucleus, FUNCTIONAL-ANALYSIS, FRUIT, Biology and Life Sciences, fruit, ARTIFICIAL MICRORNAS, Clone Cells, arabidopsis, MicroRNAs, Fruit, Biomarkers

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
100
Top 10%
Top 10%
Top 10%
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