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| Content Provider | Springer Nature Link |
|---|---|
| Author | Jovavić, Živko Rakić, Tamara Stevavić, Branka Radović, Svetlana |
| Copyright Year | 2011 |
| Abstract | In order to investigate changes of oxidative status in relation to the activity of the various protective mechanisms in resurrection plant Ramonda nathaliae, we have analysed time and relative water content (RWC) related changes in lipid peroxidation and ion leakage, hydrogen peroxide accumulation, changes of pigment content and antioxidative enzyme activity, together with expression of dehydrins. The results indicate that enhanced oxidative status during dehydration, not previously reported for resurrection plants, could play an active role in inducing the desiccation adaptive response in R. nathaliae. A critical phase is shown to exist during dehydration (in the range of RWC between 50 and 70%) during which a significant increase in hydrogen peroxide accumulation, lipid peroxidation and ion leakage, accompanied by a general decline in antioxidative enzyme activity, takes place. This phase is designated as a transition characterized by change in the type of stress response. The initial response, relying mainly on the enzymatic antioxidative system, is suspended but more effective, desiccation specific protective mechanisms, such as expression of dehydrins, are then switched on. The expression of dehydrins in R. nathaliae could be inducible as well as constitutive. In order to cope with the oxidative stress associated with rapid rewatering, R. nathaliae reactivated antioxidative enzymes. We propose that controlled elevation of reactive oxygen species, such as hydrogen peroxide, could be an important mechanism enabling resurrection plants to sense dehydration and to trigger an adaptive programme at an appropriate stage during the dehydration/rehydration cycle. |
| Starting Page | 231 |
| Ending Page | 240 |
| Page Count | 10 |
| File Format | |
| ISSN | 01676903 |
| Journal | Plant Growth Regulation |
| Volume Number | 64 |
| Issue Number | 3 |
| e-ISSN | 15735087 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2011-01-21 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Resurrection plants Ramonda nathaliae Dehydration/rehydration Antioxidative systems Plant Physiology Plant Anatomy/Development Plant Sciences Agriculture |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science Agronomy and Crop Science |
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