http://www.cnr.it/ontology/cnr/individuo/prodotto/ID10636
Impact of ozone on monoterpene emissions and evidence for an isoprene-like antioxidant action of (Articolo in rivista)
- Type
- Label
- Impact of ozone on monoterpene emissions and evidence for an isoprene-like antioxidant action of (Articolo in rivista) (literal)
- Anno
- 2004-01-01T00:00:00+01:00 (literal)
- Alternative label
Loreto, F; Pinelli, P; Manes, F; Kollist, H (2004)
Impact of ozone on monoterpene emissions and evidence for an isoprene-like antioxidant action of
in Tree physiology
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Loreto, F; Pinelli, P; Manes, F; Kollist, H (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Titolo
- Impact of ozone on monoterpene emissions and evidence for an isoprene-like antioxidant action of (literal)
- Abstract
- Quercus ilex (L.) leaves emit monoterpenes, particularly alpha-pinene, beta-pinene and sabinene. Apart
from the monoterpene pools that are stored in specialized structures and have a clear defensive, or attractive role, the
function of monoterpenes in Q. ilex leaves is unknown. We tested whether monoterpenes have an antioxidant role,
as has previously been found for isoprene in isoprene-emitting leaves. We exposed Q. ilex leaves to either mild and
repeated ozone exposure (Experiment 1) or to a single acute ozone exposure (Experiment II) at temperatures ranging
between 20 and 32 degreesC. Both ozone treatments rapidly stimulated monoterpene synthesis, but had no effect on
photosynthesis and caused no visible damage to leaves maintained at 25, 30 or 32 degreesC. Ozone inhibited both
photosynthesis and monoterpene synthesis in leaves maintained at 20 degreesC. To characterize the relationship
between monoterpenes and ozone-induced damage, we fed detached leaves fosmidomycin, a selective inhibitor of
isoprene synthesis. Fosmidomycin caused rapid and complete inhibition of monoterpene emissions in leaves
maintained at 30 degreesC, confirming that monoterpenes are synthesized by the same biochemical pathway as
isoprene. However, over the experimental period, fosmidomycin did not affect concentrations of compounds that are
formed from chloroplastic isoprenoids and that might have conferred antioxidant protection, either directly
(carotenoids) or indirectly (chlorophylls, xanthophylls). In leaves whose monoterpene synthesis had been inhibited
by fosmidomycin, ozone rapidly and significantly inhibited photosynthesis and increased the production of hydrogen
peroxide and malonyldialdehyde. We conclude that monoterpenes produced by Q. ilex leaves share the same
biosynthetic pathway and function as isoprene. Furthermore, all volatile isoprenoids may have similar antioxidant
properties and may be stimulated by the same stress-inducing conditions. (literal)
- Prodotto di
- Autore CNR
Incoming links:
- Prodotto
- Autore CNR di
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi