Project description:We have used deep sequencing of small RNAs from nodules and root apexes of the model legume Medicago truncatula, to identify 113 novel candidate miRNAs. These miRNAs (legume or Mt-specific) are encoded by 278 putative hairpin precursors in the M. truncatula genome. Several miRNAs are differentially expressed in nodules and root tips and large variety of targets could be predicted for these genes. Specific miRNA isoforms showed contrasting expression patterns in these tissues Keywords: Transcriptome analysis
Project description:Expression data from different tissues (shoots and roots) of Medicago truncatula exposed to three different types of biosolids amended soil
Project description:affy_molecularmechanism_medicago - affy_molecularmechanism_medicago - -Aphanomyces euteiches (Ae), a soilborne oomycete, is the causal agent of pea root rot, a major disease on various cultivated legume species. To gain insight into the mechanism underlying partial resistance to this pathogen, a pathosystem has been developed using the model legume Medicago truncatula (Mt). Two Mt accessions A17 and F83005.5 have been shown to display differential responses upon infection with Ae (partially resistance and susceptibility, respectively). Genetic analyses using a RIL population derived from a cross between those two lines lead to the identification of, prAe1, a major QTL involved in the observed partial resistance. Near isogenic lines (NIL) 5B2 and 5D2 whose genomes are identical except at the prAe1 locus (resistant alleles for 5B2, susceptible alleles for 5D2) have been generated, and the same differential response toward Ae has been found. The aim of this experiment is to analyse and compare 5B2 and 5D2 transcriptomes at 1 and 6 days after Ae inoculation to identify gene networks that are regulated in a prAe1 dependent manner.--Fifteen-day-old 5B2 or 5D2 plants were grown in vitro on M medium. The entire roots were then inoculated (or not = 0dpi) with a A. euteiches zoospores (75000zsp/ml) and harvested one or six days after inoculation. Three independent repeats were performed. 18 arrays - Medicago; resistance vs susceptibility comparison,time course,treated vs untreated comparison
