AI Article Synopsis
- Salt stress negatively impacts plant growth and crop yields, creating a need for developing salt-tolerant crops through genetic solutions.
- Research highlights the role of the transcription elongation factor AtSPT4-2 in Arabidopsis thaliana, indicating that its expression increases in response to salt and that it enhances salt tolerance when overexpressed.
- AtSPT4-2 helps maintain ion homeostasis and regulates genes related to stress response, making it a promising target for improving salt tolerance in crops.
Article Abstract
Background: Salt stress significantly influences plant growth and reduces crop yield. It is highly anticipated to develop salt-tolerant crops with salt tolerance genes and transgenic technology. Hence, it is critical to identify salt tolerance genes that can be used to improve crop salt tolerance.
Results: We report that the transcription elongation factor suppressor of Ty 4-2 (SPT4-2) is a positive modulator of salt tolerance in Arabidopsis thaliana. AtSPT4-2 expression is induced by salt stress. Knockout mutants of AtSPT4-2 display a salt-sensitive phenotype, whereas AtSPT4-2 overexpression lines exhibit enhanced salt tolerance. Comparative transcriptomic analyses revealed that AtSPT4-2 may orchestrate the expression of genes associated with salt tolerance, including stress-responsive markers, protein kinases and phosphatases, salt-responsive transcription factors and those maintaining ion homeostasis, suggesting that AtSPT4-2 improves salt tolerance mainly by maintaining ion homeostasis and enhancing stress tolerance.
Conclusions: AtSPT4-2 positively modulates salt tolerance by maintaining ion homeostasis and regulating stress-responsive genes and serves as a candidate for the improvement of crop salt tolerance.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9869573 | PMC |
| http://dx.doi.org/10.1186/s12870-023-04060-x | DOI Listing |
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