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Tissue specific diurnal rhythm of transcripts and their regulation during herbivore attack in Nicotiana attenuata

ABSTRACT: Idenfication and characterization of oscillating transcripts after elicitation with oral secretions from the sepcialist herbivore, Manduca sexta larvae

ORGANISM(S): Nicotiana attenuata

PROVIDER: GSE30287 | GEO | 2011/12/29

SECONDARY ACCESSION(S): PRJNA143589

REPOSITORIES: GEO

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Tissue specific diurnal rhythm of transcripts and their regulation during herbivore attack in Nicotiana attenuata

Project description:Idenfication and characterization of oscillating transcripts after elicitation with oral secretions from the sepcialist herbivore, Manduca sexta larvae Source leaves, sink leaves and roots were collected every 4 h for one days.

2011-12-29 | E-GEOD-30287 | biostudies-arrayexpress

Dicer-like proteins and their role in plant-herbivore interactions in Nicotiana attenuata

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

NaJAZh regulates a subset of defense responses against herbivores and counteracts developmental necrosis in Nicotiana attenuata plants

2012-07-12 | GSE33681 | GEO

Characterization of Nicotiana attenuata plants with reduced expression of lectin receptor kinase 1 (ir-lecRK1 plants).

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

Characterization of Nicotiana attenuata plants with reduced expression of lectin receptor kinase 1 (ir-lecRK1 plants).

2011-11-23 | GSE29905 | GEO

NaJAZh regulates a subset of defense responses against herbivores and counteracts developmental necrosis in Nicotiana attenuata plants

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

A jasmonate ZIM-domain protein NaJAZd regulates floral jasmonic acid levels and counteracts flower abscission in Nicotiana attenuata plants

Project description:Identification of transcripts that change expression in Nicotiana attenuata plants with reduced expression of JAZd after elicitation with oral secretions of Manduca sexta larvae.

2014-12-31 | GSE43395 | GEO

NaMYC2 transcription factor regulates a subset of plant defense responses in Nicotiana attenuata

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

NaMYC2 transcription factor regulates a subset of plant defense responses in Nicotiana attenuata

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

Dicer-like proteins and their role in plant-herbivore interactions in Nicotiana attenuata

2013-12-24 | GSE30124 | GEO