Dataset Information

Protein expression in tomato tissues as a function of Al3+ stress (Suping_Exp4)

ABSTRACT: The goal of this experiment is to identify the changes in protein expression induced by Al treatment with a view towards developing a molecular level understanding of Al tolerance in an important crop species. In this particular experiment the focus was on protein expression in tomato embryo. Tomato (Solanum lycopersicum ‘Micro-Tom’) plants were treated in Magnavaca’s solution (pH 4.5) supplemented with 50 µM AlK(SO4)2·12H2O providing 7.5 µM Al3+ activity over a four-month period beginning at the emergence of the first flower buds and ending when a few leaves started to turn yellow. Proteins from root, leaf, embryo and seed-coat tissues were identified using a 8-plex iTRAQ labeling strategy followed by a two-dimensional (high- and low-pH) chromatographic separation, and final generation of MS/MS spectra of tryptic peptides on an LTQ-Orbitrap Elite-mass spectrometer

INSTRUMENT(S): LTQ Orbitrap Elite

ORGANISM(S): Solanum Lycopersicum

TISSUE(S): Embryo

SUBMITTER: Ted Thannhauser

LAB HEAD: Ted Thannhauser

PROVIDER: PXD003601 | Pride | 2016-04-25

REPOSITORIES: Pride

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Publications

Proteome Modification in Tomato Plants upon Long-Term Aluminum Treatment.

Zhou Suping S Okekeogbu Ikenna I Sangireddy Sasikiran S Ye Zhujia Z Li Hui H Bhatti Sarabjit S Hui Dafeng D McDonald Daniel W DW Yang Yong Y Giri Shree S Howe Kevin J KJ Fish Tara T Thannhauser Theodore W TW

Journal of proteome research 20160418 5

This study aimed to identify the aluminum (Al)-induced proteomes in tomato (Solanum lycopersicum, "Micro-Tom") after long-term exposure to the stress factor. Plants were treated in Magnavaca's solution (pH 4.5) supplemented with 7.5 μM Al(3+) ion activity over a 4 month period beginning at the emergence of flower buds and ending when the lower mature leaves started to turn yellow. Proteomes were identified using a 8-plex isobaric tags for relative and absolute quantification (iTRAQ) labeling str ...[more]

PMID: 27052409

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Project description:Backgropund:In a major paradigm shift in the last decade, the knowledge about a whole class of non-coding RNAs known as miRNAs has emerged, which have proved these to be important regulators of a wide range of cellular processes by the way of modulation of gene expression. It is reported that some of these miRNAs are modified by addition or deletion of nucleotides at their ends, after biogenesis. However, the biogenesis and functions of these modifications are not well studied in eukaryotes, especially in plants. In this study, we examined the miRNA modifications in different tissues of the various plants, namely rice, tomato and Arabidopsis and identified some common features of such modifications. Results:We have analyzed different aspects of miRNA modifications in plants. To achieve this end, we developed a PERL script to find the modifications in the sequences using small RNA deep sequencing data. The modification occurs in both mature and passenger (star) strands, as well as at both the 5' and 3' ends of miRNAs. Interestingly, we found a position-specific nucleotide biased modification, as evident by increased number of modification at the 5' end with the presence of Cytosine (nucleotide 'C') at the 3âend of the miRNA sequence. The level of modifications is not strictly dependent on the abundance of miRNA. Our study showed that the modification events are independent of plant species, tissue and physiological conditions. Our analysis also indicates that the RNAi enzyme, namely, the RNA dependent RNA polymerase 6 (RDR6) may not have any role in Arabidopsis miRNA modifications. Some of these modified miRNAs are bound to AGO1, suggesting their possible roles in biological processes. Conclusions:This is a first report that reveals that 5' nucleotide additions are preferred for mature miRNA sequences with 3â terminal âCâ nucleotide. Our analysis also indicates that the miRNAs modifications involving addition of nucleotides to the 5â or 3â end are independent of RDR6 activity and are not restricted by plant species, physiological conditions and tissue types. The results also indicate that such modifications might be important for biological processes. small RNA profiles of Healthy and ToLCV infected tomato leaves were generated by deep sequencing using Illumina GAII.

Dataset Information

Protein expression in tomato tissues as a function of Al3+ stress (Suping_Exp4)

Publications

Proteome Modification in Tomato Plants upon Long-Term Aluminum Treatment.

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