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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kurasová, I. Kalina, J. Urban, O. Štroch, M. Špunda, V. |
| Copyright Year | 2003 |
| Abstract | The short-term acclimation (10-d) of Norway spruce [Picea abies (L.) Karst] to elevated CO$_{2}$ concentration (EC) in combination with low irradiance (100 μmol m$^{−2}$ s$^{−1}$) resulted in stimulation of CO$_{2}$ assimilation (by 61 %), increased total chlorophyll (Chl) content (by 17 %), significantly higher photosystem 2 (PS2) photochemical efficiency (F$_{v}$/F$_{m}$; by 4 %), and reduced demand on non-radiative dissipation of absorbed excitation energy corresponding with enhanced capacity of photon utilisation within PS2. On the other hand, at high cultivation irradiance (1 200 μmol m$^{−2}$ s$^{−1}$) both Norway spruce and spring barley (Hordeum vulgare L. cv. Akcent) responded to EC by reduced photosynthetic capacity and prolonged inhibition of F$_{v}$/F$_{m}$ accompanied with enhanced non-radiative dissipation of absorbed photon energy. Norway spruce needles revealed the expressive retention of zeaxanthin and antheraxanthin (Z+A) in darkness and higher violaxanthin (V) convertibility (yielding even 95 %) under all cultivation regimes in comparison with barley plants. In addition, the non-photochemical quenching of minimum Chl a fluorescence (SV$_{0}$), expressing the extent of non-radiative dissipation of absorbed photon energy within light-harvesting complexes (LHCs), linearly correlated with V conversion to Z+A very well in spruce, but not in barley plants. Finally, a key role of the Z+A-mediated non-radiative dissipation within LHCs in acclimation of spruce photosynthetic apparatus to high irradiance alone and in combination with EC was documented by extremely high SV$_{0}$ values, fast induction of non-radiative dissipation of absorbed photon energy, and its stability in darkness. |
| Starting Page | 513 |
| Ending Page | 523 |
| Page Count | 11 |
| File Format | |
| ISSN | 03003604 |
| Journal | Photosynthetica |
| Volume Number | 41 |
| Issue Number | 4 |
| e-ISSN | 15739058 |
| Language | English |
| Publisher | Kluwer Academic Publishers |
| Publisher Date | 2003-01-01 |
| Publisher Place | Dordrecht |
| Access Restriction | Subscribed |
| Subject Keyword | Plant Physiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science |
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