Evidence for an evolutionary hourglass pattern in herbivore-induced transcriptomic responses
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ABSTRACT:
ORGANISM(S): Nicotiana attenuata
PROVIDER: GSE90951 | GEO | 2017/12/31
SECONDARY ACCESSION(S): PRJNA356431
REPOSITORIES: GEO
Similar Datasets
Project description:DICER-like proteins produce small RNAs that silence genes involved in development and defenses against viruses and pathogens. Which DCLs participate in plant-herbivore interactions remains unstudied. We identified four distinct DCL genes and stably silenced their expression by RNAi in Nicotiana attenuata, a model system for the study of plant-herbivore interactions. Silencing DCL1 expression was lethal to the plants. Manduca sexta larvae performed significantly better on ir-dcl3and ir-dcl4 plants, but not on ir-dcl2 plants compared to wild type plants. Phytohormones, defense metabolites and microarray analyses revealed that when DCL3 and DCL4 were silenced separately, herbivore resistance traits were regulated in distinctly different ways. Crossing of the lines revealed complex interactions in the patterns of regulation. Single ir-dcl4 and double ir-dcl2/ ir-dcl3 plants were impaired in JA accumulation, while JA-Ile was increased in ir-dcl3 plants. Ir-dcl3 and ir-dcl4 plants were impaired in nicotine accumulation; silencing DCL2 in combination with either DCL3 or DCL4 restored nicotine levels to those of WT. Trypsin proteinase inhibitor activity and transcripts were only silenced in ir-dcl3 plants. We conclude that DCL2/3/4 interact in a complex manner to regulate anti-herbivore defenses and that these interactions significantly complicate the already challenging task of understanding smRNA function in the regulation of biotic interactions. Gene expression in leaves of Nicotiana attenuata wild type, irDCL3 and irDCL4 plants was measured at 1 hour after elicitation with oral secretions of Manduca sexta larvae. Three independent experiments were performed with wild type plants and three independent experiments were performed with irDCL3 and irDCL4 plants. A total of 811 genes were identified as differentially regulated in irDCL3 and irDCL4 compared to wild type plants.
2013-12-24 | E-GEOD-30124 | biostudies-arrayexpress
Project description:Identifying whether NaMYB8 regulated genes in Nicotiana attenuata
2017-08-23 | GSE102933 | GEO
Project description:Identification of transcripts that change expression in TOC1-silenced Nicotiana attenuata plants leaves and roots under drought
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Project description:Identifying whether FAC-induced early defence signalling genes were regulated by JA Gene expression in leaves of Nicotiana attenuata wild type and ir-AOC plants was measured at 30 min after elicitation with FAC (C18:3-Glu) and water (control). Three biological replicates were performed with both wild type and ir-AOC plants. In total 12 microarraies were hybridized.
2016-08-23 | E-GEOD-75006 | biostudies-arrayexpress
Project description:Identification of significantly altered transcripts in Nicotiana attenuata plants with reduced MYC2 expression after induction with oral secretions of Manduca sexta larvae. Gene expression in leaves of Nicotiana attenuata EV and MYC2_VIGS plants was measured at 1 hour after induction with oral secretions of Manduca sexta larvae. Three independent experiments were performed with EV plants and three independent experiments were performed with MYC2_VIGS plants. A total of 47 genes were identified as differentially regulated in MYC2_VIGS plants compared to EV plants.
2013-05-17 | E-GEOD-45608 | biostudies-arrayexpress
Project description:Nicotiana attenuata and Solanum nigrum were challenged with different insects: Manduca sexta and Tupiocoris notatus in different combinations Goals of the study are first to haracterize the transcriptional response of two native Solanaceous plants (Nicotiana attenuata and Solanum nigrum) to attack from two herbivorous pests common on Solanaceous crops (Manduca sexta and Tupiocoris notatus). And second to identify genes involved in herbivore vaccination phenomenon. After germination, inbred and genetically characterized lines of N. attenuata DI92 and S. nigrum Sn30 originally collected from southwestern Utah in 1988, and Jena Germany in 2000, respectively, were grown in a greenhouse. Eggs of Manduca sexta (abbreviated M. s.) came from the North Carolina State University - Entomology Insectary and were hatched under 37°C. Nymphs and adults of Tupiocoris notatus (abbreviated T. n.) came from laboratory colonies started in 2000 with individuals collected from our Utah field sites. Plant were challenged with these different insect and combinations of them. All plants for a given treatment were enclosed in glass-and-mesh insect cages to avoid cross-infection. After 24 h or 5 days the herbivores and their frass were removed, and the above ground biomass of each plant was flash-frozen in liquid nitrogen and stored at -80 °C until RNA extraction. Three independent replicate cages (biological replicates) were used for each of the 7 treatments resulting in a total of 21 cages per species. RNA extraction was performed according to the protocol using Trizol. The RNA samples represent a pooled sample from 4 plants grown in a cage. Keywords: Direct comparison
2007-09-01 | GSE8143 | GEO
Project description:Identification of transcripts that change expression in Nicotiana attenuata plants with reduced expression of JAZh after elicitation with oral secretions of Manduca sexta larvae. Gene expression in leaves of Nicotiana attenuata wild type and irJAZh plants was measured at 2 hour after elicitation with oral secretions of Manduca sexta larvae. Three independent experiments were performed with wild type plants and three independent experiments were performed with irJAZh plants. A total of 480 genes were identified as more the 2 fold differentially regulated in irJAZh plants compared to wild type plants.
2012-07-11 | E-GEOD-33681 | biostudies-arrayexpress
Project description:DICER-like proteins produce small RNAs that silence genes involved in development and defenses against viruses and pathogens. Which DCLs participate in plant-herbivore interactions remains unstudied. We identified four distinct DCL genes and stably silenced their expression by RNAi in Nicotiana attenuata, a model system for the study of plant-herbivore interactions. Silencing DCL1 expression was lethal to the plants. Manduca sexta larvae performed significantly better on ir-dcl3and ir-dcl4 plants, but not on ir-dcl2 plants compared to wild type plants. Phytohormones, defense metabolites and microarray analyses revealed that when DCL3 and DCL4 were silenced separately, herbivore resistance traits were regulated in distinctly different ways. Crossing of the lines revealed complex interactions in the patterns of regulation. Single ir-dcl4 and double ir-dcl2/ ir-dcl3 plants were impaired in JA accumulation, while JA-Ile was increased in ir-dcl3 plants. Ir-dcl3 and ir-dcl4 plants were impaired in nicotine accumulation; silencing DCL2 in combination with either DCL3 or DCL4 restored nicotine levels to those of WT. Trypsin proteinase inhibitor activity and transcripts were only silenced in ir-dcl3 plants. We conclude that DCL2/3/4 interact in a complex manner to regulate anti-herbivore defenses and that these interactions significantly complicate the already challenging task of understanding smRNA function in the regulation of biotic interactions.
2013-12-24 | GSE30124 | GEO
Project description:Identification of transcripts that change expression in Nicotiana attenuata plants with reduced expression of lectin receptor kinase 1 after elicitation with oral secretions of Manduca sexta larvae. Gene expression in leaves of Nicotiana attenuata wild type and ir-lecRK1 plants was measured at 1 hour after elicitation with oral secretions of Manduca sexta larvae. Three independent experiments were performed with wild type plants and three independent experiments were performed with ir-lecRK1 plants. A total of 148 genes were identified as differentially regulated in ir-lecRK1 plants compared to wild type plants.
2011-11-23 | E-GEOD-29905 | biostudies-arrayexpress
Project description:Identification of significantly altered transcripts in Nicotiana attenuata plants with reduced MYC2 expression after induction with oral secretions of Manduca sexta larvae.
2013-05-17 | GSE45608 | GEO