Academic Journal
The SCL30a SR protein regulates ABA‐dependent seed traits and germination under stress
| العنوان: | The SCL30a SR protein regulates ABA‐dependent seed traits and germination under stress |
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| المؤلفون: | Laloum, Tom, Carvalho, Sofia D., Martín, Guiomar, Richardson, Dale N., Cruz, Tiago M. D., Carvalho, Raquel F., Stecca, Kevin L., Kinney, Anthony J., Zeidler, Mathias, Barbosa, Inês C. R., Duque, Paula |
| المصدر: | Plant, Cell & Environment ; volume 46, issue 7, page 2112-2127 ; ISSN 0140-7791 1365-3040 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2023 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | SR proteins are conserved RNA‐binding proteins best known as splicing regulators that have also been implicated in other steps of gene expression. Despite mounting evidence for a role in plant development and stress responses, the molecular pathways underlying SR protein regulation of these processes remain poorly understood. Here we show that the plant‐specific SCL30a SR protein negatively regulates ABA signaling to control seed traits and stress responses during germination in Arabidopsis . Transcriptome‐wide analyses revealed that loss of SCL30a function barely affects splicing, but largely induces ABA‐responsive gene expression and genes repressed during germination. Accordingly, scl30a mutant seeds display delayed germination and hypersensitivity to ABA and high salinity, while transgenic plants overexpressing SCL30a exhibit reduced ABA and salt stress sensitivity. An ABA biosynthesis inhibitor rescues the enhanced mutant seed stress sensitivity, and epistatic analyses confirm that this hypersensitivity requires a functional ABA pathway. Finally, seed ABA levels are unchanged by altered SCL30a expression, indicating that the gene promotes seed germination under stress by reducing sensitivity to the phytohormone. Our results reveal a new player in ABA‐mediated control of early development and stress response. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1111/pce.14593 |
| الاتاحة: | http://dx.doi.org/10.1111/pce.14593 https://onlinelibrary.wiley.com/doi/pdf/10.1111/pce.14593 |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.868508F0 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1111/pce.14593 |
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