Transcription Factor SiDi19-3 Enhances Salt Tolerance of Foxtail Millet and <i>Arabidopsis</i>
Salt stress is an important limiting factor of crop production. Foxtail millet (<i>Setaria italica</i> L.) is an important model crop for studying tolerance to various abiotic stressors. Therefore, examining the response of foxtail millet to salt stress at the molecular level is critical...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-01-01
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| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/24/3/2592 |
| Summary: | Salt stress is an important limiting factor of crop production. Foxtail millet (<i>Setaria italica</i> L.) is an important model crop for studying tolerance to various abiotic stressors. Therefore, examining the response of foxtail millet to salt stress at the molecular level is critical. Herein, we discovered that SiDi19-3 interacts with SiPLATZ12 to control salt tolerance in transgenic <i>Arabidopsis</i> and foxtail millet seedlings. <i>SiDi19-3</i> overexpression increased the transcript levels of most Na<sup>+</sup>/H<sup>+</sup> antiporter (<i>NHX</i>), salt overly sensitive (<i>SOS</i>), and calcineurin B-like protein (<i>CBL</i>) genes and improved the salt tolerance of foxtail millet and <i>Arabidopsis</i>. Six <i>SiDi19</i> genes were isolated from foxtail millet. Compared with roots, stems, and leaves, panicles and seeds had higher transcript levels of <i>SiDi19</i> genes. All of them responded to salt, alkaline, polyethylene glycol, and/or abscisic acid treatments with enhanced expression levels. These findings indicate that <i>SiDi19-3</i> and other <i>SiDi19</i> members regulate salt tolerance and other abiotic stress response in foxtail millet. |
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| ISSN: | 1661-6596 1422-0067 |