| Title: | "BVOC emissions, photosynthetic characteristics and changes in chloroplast ultrastructure of Platanus orientalis L. exposed to elevated CO2 and high temperature" |
| Author(s): | Velikova V; Tsonev T; Barta C; Centritto M; Koleva D; Stefanova M; Busheva M; Loreto F; |
| Address: | "Bulgarian Academy of Sciences, Institute of Plant Physiology, Acad. G. Bonchev, Bl. 21, 1113 Sofia, Bulgaria. violet@bio21.bas.bg" |
| DOI: | 10.1016/j.envpol.2009.05.007 |
| ISSN/ISBN: | 1873-6424 (Electronic) 0269-7491 (Linking) |
| Abstract: | "To investigate the interactive effects of increasing [CO(2)] and heat wave occurrence on isoprene (IE) and methanol (ME) emissions, Platanus orientalis was grown for one month in ambient (380 micromol mol(-1)) or elevated (800 micromol mol(-1)) [CO(2)] and exposed to high temperature (HT) (38 degrees C/4 h). In pre-existing leaves, IE emissions were always higher but ME emissions lower as compared to newly-emerged leaves. They were both stimulated by HT. Elevated [CO(2)] significantly reduced IE in both leaf types, whereas it increased ME in newly-emerged leaves only. In newly-emerged leaves, elevated [CO(2)] decreased photosynthesis and altered the chloroplast ultrastructure and membrane integrity. These harmful effects were amplified by HT. HT did not cause any unfavorable effects in pre-existing leaves, which were characterized by inherently higher IE rates. We conclude that: (1) these results further prove the isoprene's putative thermo-protective role of membranes; (2) HT may likely outweigh the inhibitory effects of elevated [CO(2)] on IE in the future" |
| Keywords: | Butadienes/*chemistry/metabolism Carbon Dioxide/*metabolism Chloroplasts/chemistry/metabolism/*ultrastructure Hemiterpenes/*chemistry/metabolism Hot Temperature Magnoliopsida/chemistry/*metabolism/ultrastructure Methanol/chemistry Pentanes/*chemistry/meta; |
| Notes: | "MedlineVelikova, Violeta Tsonev, Tsonko Barta, Csengele Centritto, Mauro Koleva, Dimitrina Stefanova, Miroslava Busheva, Mira Loreto, Francesco eng Research Support, Non-U.S. Gov't England 2009/05/30 Environ Pollut. 2009 Oct; 157(10):2629-37. doi: 10.1016/j.envpol.2009.05.007. Epub 2009 May 28" |
