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| Content Provider | Springer Nature Link |
|---|---|
| Author | Xu, Jin Yin, Hengxia Wang, Wenying Mi, Qin Liu, Xiaojing |
| Copyright Year | 2009 |
| Abstract | The effects of sodium nitroprusside (SNP) on callus induction and shoot regeneration of Dioscorea opposite Thunb. have been studied. Application of 40 μM of SNP depresses accumulation of H2O2 in tuber explants of Dioscorea opposita markedly. Supplementation of 40 μM of SNP to the Murashige and Skoog medium with combinations of benzylaminopurine (3 mg dm−3) and naphthaleneacetic acid (0.5 mg dm−3) reduces the browning of explants and increases the frequency of callus induction from tuber explants significantly. The regeneration frequency of adventitious shoot shows a significant increase in the presence of SNP. Further analysis indicates that treatment with 40 μM of SNP results in significant decreases in catalase and peroxidase activity, while increasing the activity of superoxide dismutase. Supplementation with 40 μM of SNP also promotes the accumulation of non-enzymic antioxidants, including proline and glutathione. The effects on callus induction and shoot regeneration promoted by SNP were reversed by the nitric oxide (NO) scavenger 2-(4-carboxyphenyl)- 4,4,5,5- tetramethylimidazoline-1-oxyl-3-oxide. These results indicate that the exogenously applied NO-donor SNP alleviates browning of tuber explants by reducing H2O2 accumulation, thereby promoting a higher in vitro proliferation frequency of D. opposita. |
| Starting Page | 279 |
| Ending Page | 285 |
| Page Count | 7 |
| File Format | |
| ISSN | 01676903 |
| Journal | Plant Growth Regulation |
| Volume Number | 59 |
| Issue Number | 3 |
| e-ISSN | 15735087 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2009-10-02 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Micropropagation Sodium nitroprusside Browning Oxidative stress Agriculture Plant Physiology Plant Anatomy/Development Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science Agronomy and Crop Science |
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