Photosynthetic adaptation and survival strategy of Duvalia velutina in an extremely arid environment
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| 024 | 7 | 0 | |a 10.1007/s11099-015-0143-0 |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s11099-015-0143-0 | ||
| 245 | 0 | 0 | |a Photosynthetic adaptation and survival strategy of Duvalia velutina in an extremely arid environment |h [Elektronische Daten] |c [Y. Masrahi, T. Al-Turki, O. Sayed] |
| 520 | 3 | |a Leafless Duvalia velutina Lavranos (Apocynaceae) is an arido-active stem succulent common in the arid region southwest of the Arabian Peninsula. This region is characterized by a short wet season with erratic rainfall and a long dry season with high temperature and high irradiance. We investigated the survival strategy of D. velutina by studying nurse association, gas exchange, and chlorophyll fluorescence. Results showed that D. velutina exhibited the strict nurse association with shade for protection against heat and high irradiance. Results also showed that D. velutina is an obligate CAM plant with ample physiotypic plasticity involving a shift to CAM-idling under prolonged drought. Chlorophyll fluorescence measurements revealed water stress-induced reduction of PSII activity occurring in concomitance with a marked rise of nonphotochemical quenching and chlorenchyma anthocyanin content. These results reflected photoprotective capacity involving nonradiative excess energy dissipation and antioxidative attributes. We concluded that the complex survival strategy of D. velutina in its natural arid habitat includes a multifaceted interplay of nurse association, physiotypic plasticity, and photoprotective mechanisms. | |
| 540 | |a The Institute of Experimental Botany, 2015 | ||
| 690 | 7 | |a chlorophyll fluorescence |2 nationallicence | |
| 690 | 7 | |a CAM |2 nationallicence | |
| 690 | 7 | |a CAM-idling |2 nationallicence | |
| 690 | 7 | |a drought |2 nationallicence | |
| 690 | 7 | |a Duvalia velutina |2 nationallicence | |
| 690 | 7 | |a nurse association |2 nationallicence | |
| 690 | 7 | |a photoprotection |2 nationallicence | |
| 690 | 7 | |a C i : intercellular CO2 concentration |2 nationallicence | |
| 690 | 7 | |a Chl : chlorophyll |2 nationallicence | |
| 690 | 7 | |a Fv/Fm : maximal photochemical efficiency of PSII antenna |2 nationallicence | |
| 690 | 7 | |a g s : stomatal conductance |2 nationallicence | |
| 690 | 7 | |a NPQ : nonphotochemical quenching |2 nationallicence | |
| 690 | 7 | |a P N : photosynthetic rate |2 nationallicence | |
| 690 | 7 | |a ΦPSII : PSII quantum yield |2 nationallicence | |
| 700 | 1 | |a Masrahi |D Y. |u Faculty of Science, Jazan University, 45142, Jazan, Saudi Arabia |4 aut | |
| 700 | 1 | |a Al-Turki |D T. |u King Abdul Aziz City for Science and Technology, 11442, Riyadh, Saudi Arabia |4 aut | |
| 700 | 1 | |a Sayed |D O. |u Faculty of Science, Jazan University, 45142, Jazan, Saudi Arabia |4 aut | |
| 773 | 0 | |t Photosynthetica |d The Institute of Experimental Biology of the Czech Academy of Sciences |g 53/4(2015-12-01), 555-561 |x 0300-3604 |q 53:4<555 |1 2015 |2 53 |o 11099 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s11099-015-0143-0 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s11099-015-0143-0 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Masrahi |D Y. |u Faculty of Science, Jazan University, 45142, Jazan, Saudi Arabia |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Al-Turki |D T. |u King Abdul Aziz City for Science and Technology, 11442, Riyadh, Saudi Arabia |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Sayed |D O. |u Faculty of Science, Jazan University, 45142, Jazan, Saudi Arabia |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Photosynthetica |d The Institute of Experimental Biology of the Czech Academy of Sciences |g 53/4(2015-12-01), 555-561 |x 0300-3604 |q 53:4<555 |1 2015 |2 53 |o 11099 | ||