Transcriptome analysis of intraspecific competition in Arabidopsis thalianareveals organ-specific signatures related to nutrient acquisition and general stress response pathwaysReport as inadecuate




Transcriptome analysis of intraspecific competition in Arabidopsis thalianareveals organ-specific signatures related to nutrient acquisition and general stress response pathways - Download this document for free, or read online. Document in PDF available to download.

BMC Plant Biology

, 12:227

Plant-biotic interactions

Abstract

BackgroundPlants are sessile and therefore have to perceive and adjust to changes in their environment. The presence of neighbours leads to a competitive situation where resources and space will be limited. Complex adaptive responses to such situation are poorly understood at the molecular level.

ResultsUsing microarrays, we analysed whole-genome expression changes in Arabidopsis thaliana plants subjected to intraspecific competition. The leaf and root transcriptome was strongly altered by competition. Differentially expressed genes were enriched in genes involved in nutrient deficiency mainly N, P, K, perception of light quality, and responses to abiotic and biotic stresses. Interestingly, performance of the generalist insect Spodoptera littoralis on densely grown plants was significantly reduced, suggesting that plants under competition display enhanced resistance to herbivory.

ConclusionsThis study provides a comprehensive list of genes whose expression is affected by intraspecific competition in Arabidopsis. The outcome is a unique response that involves genes related to light, nutrient deficiency, abiotic stress, and defence responses.

KeywordsArabidopsis thaliana Gene expression Intraspecific competition Herbivory Abiotic stress Biotic stress Electronic supplementary materialThe online version of this article doi:10.1186-1471-2229-12-227 contains supplementary material, which is available to authorized users.

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Author: Frédéric G Masclaux - Friederike Bruessow - Fabian Schweizer - Caroline Gouhier-Darimont - Laurent Keller - Philippe Reym

Source: https://link.springer.com/







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