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啟動誘導的組蛋白修飾改變在鹽脅迫下調節大豆的轉錄反應

發表時間:2023-09-19 10:57

Abstract

Plants that have experienced certain abiotic stress may gain tolerance to a similar stress in subsequent exposure. This phenomenon, called priming, was observed here in soybean (Glycine max) seedlings exposed to salt stress. Time-course transcriptomic profiles revealed distinctively different bio-technology Co. Ltd.transcriptional responses in the primed seedlings from those in the non-primed seedlings under high salinity stress, indicating a stress response strategy of repressing unhelpful biotic stress responses and focusing on the promotion of those responses important for salt tolerance. To identify histone marks altered by the priming salinity treatment, a genome-wide profiling of histone 3 lysine 4 dimethylation (H3K4me2), H3K4me3, and histone 3 lysine 9 acetylation (H3K9ac) was performed. Our integrative analyses revealed that priming induced drastic alterations in these histone marks, which coordinately modified the stress response, ion homeostasis, and cell wall modification. Furthermore, transcriptional network analyses unveiled epigenetically modified networks which mediate the strategic downregulation of defense responses. Altering the histone acetylation status using a chemical inhibitor could elicit the priming-like transcriptional responses in non-primed seedlings, confirming the importance of histone marks in forming the priming response.

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Keywords: ChIP-Seq; Glycine max; gene network; histone modification; priming; salt stress; soybean; transcriptome.

References

Bates, L.S., Waldren, R.P. & Teare, I.D. (1973) Rapid determination of free proline for water-stress studies. Plant and Soil, 39, 205-207.

Buels, R., Yao, E., Diesh, C.M., Hayes, R.D., Munoz-Torres, M., Helt, G., et al. (2016) JBrowse: a dynamic web platform for genome visualization and analysis. Genome Biology, 17, 1-12.

Cho, S.K., Kim, J.E., Park, J.A., Eom, T.J. & Kim, W.T. (2006) Constitutive expression of abiotic stress-inducible hot pepper CaXTH3, which encodes a xyloglucan endotransglucosylase/hydrolase homolog, improves drought and salt tolerance in transgenic Arabidopsis plants. FEBS Letters, 580, 3136-3144.

Conrath, U., Beckers, G.J.M., Langenbach, C.J.G. & Jaskiewicz, M.R. (2015) Priming for enhanced defense. Annual Review of Phytopathology, 53, 97-119.

Davenport, R.J., Munoz-Mayor, A., Jha, D., Essah, P.A., Rus, A. & Tester, M. (2007) The Na+ transporter AtHKT1;1 controls retrieval of Na+ from the xylem in Arabidopsis. Plant, Cell & Environment, 30, 497-507.


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