Project description:Fourth leaves of rice seedlings (4.5 leaf stage) grown in hydroponic culture were inoculated with rice blast fungus and gene expression profiles were analyzed by microarray.
Project description:Fourth leaves of rice seedlings (4.5 leaf stage) grown in hydroponic culture were inoculated with rice blast fungus and gene expression profiles were analyzed by microarray.
Project description:affy_riz_2011_7 - affy_riz_2011_7 - The Bacterial Leaf Blight disease of rice is due to Xanthomonas oryzae pv. oryzae. As for many pathogenic bacteria, it relies on a type 3 secretion system (TTSS) that is devoted to the injection of type 3 effectors (T3Es) into the eukaryotic host cell. These proteins are meant to suppress host basal defense responses and/or mimic some host regulatory function promoting bacterial survey in the plant. During an incompatible interaction, T3Es may act as Avr proteins and stimulate Effector-Triggered-Immunity. We aim at evaluating the transcriptomic response of rice leaves challenged with avirulent strains of Xoo BAI3 and MAI1 on resistant lines IR64 and IRBB4 versus the reference susceptible rice line Nipponbare. In addition, we investigated the transcriptomic response of rice leaves upon inoculation of an XoohrcC mutant strain affected in the production of a functional TTSS.-The goal of the experiment is to characterize the rice leaf transcriptome response, upon the inoculation of susceptible and resistant rice leaves 24 hours post-infection. To that end, the experimental design includes the inoculation of susceptible Nipponbare rice leaves with Xoo strains BAI3 (race A1) and MAI1 (race A3), that will be compared to the response of resistant lines IRBB4 and IR64 rice lines. In addition, Nipponbare rice leaves will also be challenged with the BAI3hrcC mutant that is affected in the production of a functional TTSS.
Project description:Most land plants form beneficial associations with arbuscular mycorrhizal (AM) fungi which improves mineral nutrition, mainly phosphorus and nitrogen in the host plant in exchange for photosynthetically fixed carbon. Most of our knowledge on the AM symbiosis derives from dicotyledonous species. We show that inoculation with the AM fungus Funneliformis mossease stimulates growth and increases Pi content in leaves of the rice cultivar Loto (O. sativa ssp japonica). Although rice is a host for AM fungi, the molecular mechanism underlying the AM symbiosis, in particular the systemic transcriptional responses of shoots to AM inoculation, remain largely elusive. Transcript profiling of the shoots indicated the systemic induction of genes involved in the biosynthesis of phospholipids (phosphoinositides, inositol polyphosphates) and down-regulation of non-phosphorus lipids (galactolipids, sulfolipids) in leaves of mycorrhizal rice. Regulation of phospholipid biosynthesis genes appears to be coordinated with a reduced expression of genes involved in jasmonic acid and ethylene biosynthesis and signaling. Genes involved in phosphate starvation responses and remobilization of Pi were also found to be down-regulated in leaves of mycorrhizal rice. These results demonstrated that the AM symbiosis is accompanied by complex alterations in gene expression in shoots which are potentially important to maintain a stable symbiotic relationship in rice plants.
Project description:Fourth leaves of rice seedlings (4.5 leaf stage) grown in hydroponic culture were inoculated with rice blast fungus and gene expression profiles were analyzed by microarray. Fourth leaves of the two isogenic lines of rice cv Nipponbare (blast-resistance gene: Pia or its mutant, pia) were inoculated with rice blast fungus, P91-15B, carrying avirulence gene, AvrPia. Total RNA was isolated, labeled with cy3, and probed with agilent rice oligoarray (4x44).
Project description:Fourth leaves of rice seedlings (4.5 leaf stage) grown in hydroponic culture were inoculated with rice blast fungus and gene expression profiles were analyzed by microarray. Fourth leaves of the two isogenic lines of rice cv Nipponbare (blast-resistance gene: Pish or its mutant, pish) were inoculated with rice blast fungus, Kyu77-07A, carrying avirulence gene, AvrPish. Total RNA was isolated, labeled with cy3, and probed with agilent rice oligoarray (4x44).