Isoprenoids emission in Stipa tenacissima L.: Photosynthetic control and the effect of UV light

0469827 - ÚVGZ 2017 RIV GB eng J - Článek v odborném periodiku
Guidolotti, G. - Rey, A. - Medori, M. - Calfapietra, Carlo
Isoprenoids emission in Stipa tenacissima L.: Photosynthetic control and the effect of UV light.
Environmental Pollution. Roč. 208, B (2016), s. 336-344. ISSN 0269-7491. E-ISSN 1873-6424
Grant CEP: GA MŠMT(CZ) LO1415; GA MŠMT(CZ) LD13031
Institucionální podpora: RVO:67179843
Klíčová slova: Isoprene * Monoterpene * Alfa grass * UV radiation * Semiarid ecosystems
Kód oboru RIV: EH - Ekologie - společenstva
Impakt faktor: 5.099, rok: 2016

Fluxes of CO2 and isoprenoids were measured for the first time in Stipa tenacissima L (alfa grass), a perennial tussock grass dominant in the driest areas of Europe. In addition, we studied how those fluxes were influenced by environmental conditions, leaf ontogeny and UV radiation and compared emission rates in two contrasting seasons: summer when plants are mostly inactive and autumn, the growing season in this region. Leaf ontogeny significantly affected both photosynthesis and isoprenoids emission. Isoprene emission was positively correlated with photosynthesis, although a low isoprene emission was detected in brown leaves with a net carbon loss. Moreover, leaves with a significant lower photosynthesis emitted only monoterpenes, while at higher photosynthetic rates also isoprene was produced. Ambient UV radiation uncoupled photosynthesis and isoprene emission.

Trvalý link: http://hdl.handle.net/11104/0267615