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Gene expression profiling of M. truncatula transcription factors identifies putative regulators of grain legume seed filling. 2008

Jérôme Verdier, and Klementina Kakar, and Karine Gallardo, and Christine Le Signor, and Grégoire Aubert, and Armin Schlereth, and Christopher D Town, and Michael K Udvardi, and Richard D Thompson
Unité Mixte de Recherche en Génétique et Ecophysiologie des Légumineuses à Graines (UMR-LEG), Institut National de la Recherche Agronomique (INRA), Domaine d'Epoisses, 21110, Bretenieres, France.

Legume seeds represent a major source of proteins for human and livestock diets. The model legume Medicago truncatula is characterized by a process of seed development very similar to that of other legumes, involving the interplay of sets of transcription factors (TFs). Here, we report the first expression profiling of over 700 M. truncatula genes encoding putative TFs throughout seven stages of seed development, obtained using real-time quantitative RT-PCR. A total of 169 TFs were selected which were expressed at late embryogenesis, seed filling or desiccation. The site of expression within the seed was examined for 41 highly expressed transcription factors out of the 169. To identify possible target genes for these TFs, the data were combined with a microarray-derived transcriptome dataset. This study identified 17 TFs preferentially expressed in individual seed tissues and 135 corresponding co-expressed genes, including possible targets. Certain of the TFs co-expressed with storage protein mRNAs correspond to those already known to regulate seed storage protein synthesis in Arabidopsis, whereas the timing of expression of others may be more specifically related to the delayed expression of the legumin-class storage proteins observed in legumes.

UI MeSH Term Description Entries
D010940 Plant Proteins Proteins found in plants (flowers, herbs, shrubs, trees, etc.). The concept does not include proteins found in vegetables for which PLANT PROTEINS, DIETARY is available. Plant Protein,Protein, Plant,Proteins, Plant
D012639 Seeds The encapsulated embryos of flowering plants. They are used as is or for animal feed because of the high content of concentrated nutrients like starches, proteins, and fats. Rapeseed, cottonseed, and sunflower seed are also produced for the oils (fats) they yield. Diaspores,Elaiosomes,Embryos, Plant,Plant Embryos,Plant Zygotes,Zygotes, Plant,Diaspore,Elaiosome,Embryo, Plant,Plant Embryo,Plant Zygote,Seed,Zygote, Plant
D014157 Transcription Factors Endogenous substances, usually proteins, which are effective in the initiation, stimulation, or termination of the genetic transcription process. Transcription Factor,Factor, Transcription,Factors, Transcription
D046913 Medicago truncatula A plant species of the family FABACEAE used to study GENETICS because it is DIPLOID, self fertile, has a small genome, and short generation time. Medicago truncatulas,truncatula, Medicago
D018506 Gene Expression Regulation, Plant Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in plants. Plant Gene Expression Regulation,Regulation of Gene Expression, Plant,Regulation, Gene Expression, Plant
D020869 Gene Expression Profiling The determination of the pattern of genes expressed at the level of GENETIC TRANSCRIPTION, under specific circumstances or in a specific cell. Gene Expression Analysis,Gene Expression Pattern Analysis,Transcript Expression Analysis,Transcriptome Profiling,Transcriptomics,mRNA Differential Display,Gene Expression Monitoring,Transcriptome Analysis,Analyses, Gene Expression,Analyses, Transcript Expression,Analyses, Transcriptome,Analysis, Gene Expression,Analysis, Transcript Expression,Analysis, Transcriptome,Differential Display, mRNA,Differential Displays, mRNA,Expression Analyses, Gene,Expression Analysis, Gene,Gene Expression Analyses,Gene Expression Monitorings,Gene Expression Profilings,Monitoring, Gene Expression,Monitorings, Gene Expression,Profiling, Gene Expression,Profiling, Transcriptome,Profilings, Gene Expression,Profilings, Transcriptome,Transcript Expression Analyses,Transcriptome Analyses,Transcriptome Profilings,mRNA Differential Displays

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