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Titolo:
Emission of volatile organic compounds from ozone-exposed plants
Autore:
Heiden, AC; Hoffmann, T; Kahl, J; Kley, D; Klockow, D; Langebartels, C; Mehlhorn, H; Sandermann, H; Schraudner, M; Schuh, G; Wildt, J;
Indirizzi:
Inst Spektrochem & Angew Spektroskopie, D-44139 Dortmund, Germany Inst Spektrochem & Angew Spektroskopie Dortmund Germany D-44139 Germany KFA Julich GmbH, Forschungszentrum, Inst Chem Belasteten Atmosphare ICG2, D-52425 Julich, Germany KFA Julich GmbH Julich Germany D-52425 are ICG2, D-52425 Julich, Germany GSF Forschungszentrum Umwelt & Gesundheit, Inst Biochem Pflanzenpathol, D-85764 Neuherberg, Germany GSF Forschungszentrum Umwelt & Gesundheit Neuherberg Germany D-85764 any Univ Essen Gesamthsch, Inst Angew Bot, D-45117 Essen, Germany Univ Essen Gesamthsch Essen Germany D-45117 Bot, D-45117 Essen, Germany
Titolo Testata:
ECOLOGICAL APPLICATIONS
fascicolo: 4, volume: 9, anno: 1999,
pagine: 1160 - 1167
SICI:
1051-0761(199911)9:4<1160:EOVOCF>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
SALICYLIC-ACID; NATURAL HYDROCARBONS; RESISTANCE; TOBACCO; AIR; HYDROPEROXIDES; UNCERTAINTIES; DEPENDENCE; RESPONSES; SUNFLOWER;
Keywords:
lipoxygenase; methyl salicylate; monoterpene emissions via long-term ozone exposure; ozone-induced plant emissions; pine, VOC emissions; plant defense reactions, induced; plant responses to ozone vs pathogen attack; sesquiterpenes; stress factors; role in emission inventories; tobacco, VOC emissions; volatile organic compounds; plant emission;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Hoffmann, T Inst Spektrochem & Angew Spektroskopie, Bunsenkirchoff Str 11,D-44139 Dortmund, Germany Inst Spektrochem & Angew Spektroskopie Bunsenkirchoff Str 11 Dortmund Germany D-44139
Citazione:
A.C. Heiden et al., "Emission of volatile organic compounds from ozone-exposed plants", ECOL APPL, 9(4), 1999, pp. 1160-1167

Abstract

Plants produce a number of volatile organic compounds (VOCs), and this release plays a significant role in atmospheric chemistry. Although certain factors controlling the emission rates of VOCs from plants are reasonably well understood, the influence of abiotic stress, such as elevated ozone concentrations, is unknown. Therefore, the emission of VOCs from tobacco plants (Nicotiana tabacum L. cv. Bel B and Bel W3) and Scots pine (Pinus sylvestris L.) were studied in continuously stirred tank reactors under ozone exposure. A pulse treatment (5 h) with 120-170 nmol/mol ozone induced visible damages in the ozone-sensitive tobacco cv. Bel W3, while the more tolerant cv. Bel B seemed to be unaffected. The total amount and dynamics of the emission were studied. Both cultivars emitted methyl salicylate and a series of sesquiterpenes after the ozone treatment, but the response was less pronounced for Bel B plants. C-6-volatiles that are thought to be derived from the lipoxygenase pathway were emitted only from Bel W3 plants. The results givefurther support to the hypothesis that the ozone-induced reactions of the ozone-sensitive Bel W3 plants resemble the hypersensitive response found after pathogen attack. Longterm ozone treatment (50 nmol/mol, 8 h/d) of pine led to 40% increased emissions of monoterpenes, while no damage was visibleon the needles. Since VOCs are precursors of ozone, an increased VOC emission as a consequence of elevated ozone concentrations in the troposphere may lead to feedback mechanisms in photooxidant formation.

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Documento generato il 03/04/20 alle ore 11:06:24