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| Content Provider | Springer Nature Link |
|---|---|
| Author | Divi, Uday K. Krishna, Priti |
| Copyright Year | 2010 |
| Abstract | Brassinosteroids (BRs) are essential for proper plant growth and development and also protect plants from a variety of environmental stresses. Seeds contain relatively high levels of BRs, and BRs have been implicated in embryonic patterning and germination. How BR levels in seeds impact germination, growth, and stress tolerance in early seedlings is currently not known. To assess this, the BR biosynthetic gene AtDWF4 was overexpressed in Arabidopsis under the control of a seed-specific oleosin promoter. The resulting transgenic seedlings could overcome inhibition of germination caused by exogenous abscisic acid (ABA) and the seedlings were more tolerant to cold stress compared to wild-type and vector control seedlings. Transcript levels of COR15A, a cold-responsive gene with an established function in cold tolerance, were approximately twofold higher in transgenic seedlings than in control seedlings under cold conditions. These results establish a role for BRs in opposing the inhibitory effects of ABA in seed germination and in promoting cold stress tolerance in early Arabidopsis seedlings. |
| Starting Page | 385 |
| Ending Page | 393 |
| Page Count | 9 |
| File Format | |
| ISSN | 07217595 |
| Journal | Journal of Plant Growth Regulation |
| Volume Number | 29 |
| Issue Number | 4 |
| e-ISSN | 14358107 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2010-06-03 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Abscisic acid Arabidopsis AtDWF4 Brassinosteroid Cold stress Germination Oleosin promoter Seed Agriculture Plant Physiology Plant Anatomy/Development Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Agronomy and Crop Science |
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