Skip to main content

Advertisement

Log in

Salt tolerance of two perennial grass Brachypodium sylvaticum accessions

  • Published:
Plant Molecular Biology Aims and scope Submit manuscript

Abstract

Key message

We studied the salt stress tolerance of two accessions isolated from different areas of the world (Norway and Tunisia) and characterized the mechanism(s) regulating salt stress in Brachypodium sylvaticum Osl1 and Ain1.

Abstract

Perennial grasses are widely grown in different parts of the world as an important feedstock for renewable energy. Their perennial nature that reduces management practices and use of energy and agrochemicals give these biomass crops advantages when dealing with modern agriculture challenges such as soil erosion, increase in salinized marginal lands and the runoff of nutrients. Brachypodium sylvaticum is a perennial grass that was recently suggested as a suitable model for the study of biomass plant production and renewable energy. However, its plasticity to abiotic stress is not yet clear. We studied the salt stress tolerance of two accessions isolated from different areas of the world and characterized the mechanism(s) regulating salt stress in B. sylvaticum Osl1, originated from Oslo, Norway and Ain1, originated from Ain-Durham, Tunisia. Osl1 limited sodium transport from root to shoot, maintaining a better K/Na homeostasis and preventing toxicity damage in the shoot. This was accompanied by higher expression of HKT8 and SOS1 transporters in Osl1 as compared to Ain1. In addition, Osl1 salt tolerance was accompanied by higher abundance of the vacuolar proton pump pyrophosphatase and Na+/H+ antiporters (NHXs) leading to a better vacuolar pH homeostasis, efficient compartmentation of Na+ in the root vacuoles and salt tolerance. Although preliminary, our results further support previous results highlighting the role of Na+ transport systems in plant salt tolerance. The identification of salt tolerant and sensitive B. sylvaticum accessions can provide an experimental system for the study of the mechanisms and regulatory networks associated with stress tolerance in perennials grass.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

References

Download references

Acknowledgements

This research was supported grants from United States Department of Energy Number #DE-SC0008797 and #DE-AC02-05CH11231. XK was supported by a scholarship from the China Scholarship Council (CSC) and Nanjing Agricultural University.

Author information

Authors and Affiliations

Authors

Contributions

NS, MRW, and EdB provided research ideas and designed the experiments. NS, MRW, XK, YB, MW, IK, WDS, JPV, CMT, RT and EB participated in the implementation of the experiment, sample collection, and laboratory analysis. NS and EdB wrote the paper.

Corresponding author

Correspondence to Eduardo Blumwald.

Electronic supplementary material

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Sade, N., del Mar Rubio Wilhelmi, M., Ke, X. et al. Salt tolerance of two perennial grass Brachypodium sylvaticum accessions. Plant Mol Biol 96, 305–314 (2018). https://doi.org/10.1007/s11103-017-0696-3

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11103-017-0696-3

Keywords

Navigation