Photosynthetic responses to elevated CO2 and O-3 in Quercus ilex leaves at a natural CO2 spring
Paoletti, E; Seufert, G; Della Rocca, G; Thomsen, H
HERO ID
199365
Reference Type
Journal Article
Year
2007
Language
English
PMID
| HERO ID | 199365 |
|---|---|
| In Press | No |
| Year | 2007 |
| Title | Photosynthetic responses to elevated CO2 and O-3 in Quercus ilex leaves at a natural CO2 spring |
| Authors | Paoletti, E; Seufert, G; Della Rocca, G; Thomsen, H |
| Journal | Environmental Pollution |
| Volume | 147 |
| Issue | 3 |
| Page Numbers | 516-524 |
| Abstract | Photosynthetic stimulation and stomatal conductance (Gs) depression in Quercus ilex leaves at a CO2 spring suggested no down-regulation. The insensitivity of Gs to a CO2 increase (from ambient 1500 to 2000 mu mol mol(-1)) suggested stomatal acclimation. Both responses are likely adaptations to the special environment Of CO2 Springs. At the CO2-enriched site, not at the control site, photosynthesis decreased 9% in leaves exposed to 2x ambient O-3 concentrations in branch enclosures, compared to controls in charcoal-filtered air. The stomatal density reduction at high CO2 was one-third lower than the concomitant Gs reduction, so that the O-3 uptake per single stoma was lower than at ambient CO2. No significant variation in monoterpene emission was measured. Higher trichome and mesophyll density were recorded at the CO2-enriched site, accounting for lower O-3 sensitivity. A long-term exposure to H2S, reflected by higher foliar S-content, and CO2 might depress the antioxidant capacity of leaves close to the vent and increase their O-3 sensitivity. (c) 2006 Elsevier Ltd. All rights reserved. |
| Doi | 10.1016/j.envpol.2006.08.039 |
| Pmid | 17045714 |
| Wosid | WOS:000246922000010 |
| Url | http://linkinghub.elsevier.com/retrieve/pii/S0269749106005197 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | N1-JunN1-Photosynthetic responses to elevated CO2 and O-3 in Quercus ilex leaves at a natural CO2 springN1-ISI:000246922000010N1-Paoletti, E. Seufert, G. Della Rocca, G. Thomsen, H.AD-CNR, Ist Prot Piante, I-50019 Florence, Italy. Commiss European Communities, Joint Res Ctr, Inst Environm & Sustainabil, I-21020 Ispra, Italy. Paoletti, E, CNR, Ist Prot Piante, Via Madonna Piano 10, I-50019 Florence, Italy. e.paoletti@ipp.cnr.itID - 1594 |
| Is Public | Yes |
| Language Text | English |
| Keyword | CO2 springs; Gas exchange; Holm oak; Mediterranean vegetation; Ozone flux |
| Is Qa | No |
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