Small RNAs reflect grandparental environments in apomictic dandelion: Letter

L. Morgado, V. Preite, C. Oplaat, S. Anava, J.L. Ferreira de Carvalho, O. Rechavi, F. Johannes, K.J.F. Verhoeven (Corresponding author)

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Abstract

Plants can show long-term effects of environmental stresses and in some cases a stress “memory” has been reported to persist across generations, potentially mediated by epigenetic mechanisms. However, few documented cases exist of transgenerational effects that persist for multiple generations and it remains unclear if or how epigenetic mechanisms are involved. Here, we show that the composition of small regulatory RNAs in apomictic dandelion lineages reveals a footprint of drought stress and salicylic acid treatment experienced two generations ago. Overall proportions of 21 and 24 nt RNA pools were shifted due to grandparental treatments. While individual genes did not show strong up- or downregulation of associated sRNAs, the subset of genes that showed the strongest shifts in sRNA abundance was significantly enriched for several GO terms including stress-specific functions. This suggests that a stress-induced signal was transmitted across multiple unexposed generations leading to persistent changes in epigenetic gene regulation.
Original languageEnglish
Article numbermsx150
JournalMolecular Biology and Evolution
DOIs
Publication statusPublished - 2017

Keywords

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    Taraxacum officinale sRNA screening in transgenerational stress experiment in dandelion

    Morgado, L. (Creator), Preite, V. (Creator), Oplaat, C. (Creator), Anava, S. (Creator), Ferreira de Carvalho, J. L. (Creator), Rechavi, O. (Creator), Johannes, F. (Creator) & Verhoeven, K. (Creator), NCBI, 09 Jan 2017

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    Cite this

    Morgado, L., Preite, V., Oplaat, C., Anava, S., Ferreira de Carvalho, J. L., Rechavi, O., Johannes, F., & Verhoeven, K. J. F. (2017). Small RNAs reflect grandparental environments in apomictic dandelion: Letter. Molecular Biology and Evolution, [msx150]. https://doi.org/10.1093/molbev/msx150