Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
A process-based model to predict the effects of climatic change on leaf isoprene emission rates
Autore:
Martin, MJ; Stirling, CM; Humphries, SW; Long, SP;
Indirizzi:
Univ Essex, Dept Biol Sci, John Tabor Labs, Colchester CO4 3SQ, Essex, England Univ Essex Colchester Essex England CO4 3SQ ester CO4 3SQ, Essex, England Univ Wales, Sch Agr & Forest Sci, Bangor LL57 2UW, Gwynedd, Wales Univ Wales Bangor Gwynedd Wales LL57 2UW Bangor LL57 2UW, Gwynedd, Wales Brookhaven Natl Lab, Upton, NY 11973 USA Brookhaven Natl Lab Upton NY USA11973 aven Natl Lab, Upton, NY 11973 USA Univ Illinois, Dept Crop Sci, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 is, Dept Crop Sci, Urbana, IL 61801 USA Univ Illinois, Dept Plant Biol, Edward R Madigan Lab 190, Urbana, IL 61801USA Univ Illinois Urbana IL USA 61801 R Madigan Lab 190, Urbana, IL 61801USA
Titolo Testata:
ECOLOGICAL MODELLING
fascicolo: 2-3, volume: 131, anno: 2000,
pagine: 161 - 174
SICI:
0304-3800(20000701)131:2-3<161:APMTPT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
NATURAL HYDROCARBONS; SYNTHASE ACTIVITY; PHOTOSYNTHESIS; LEAVES; CO2; PLANTS; PHOTORESPIRATION; DIPHOSPHATE; TEMPERATURE; OZONE;
Keywords:
isoprene emissions; climate change; elevated carbon dioxide; temperature;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Martin, MJ Univ Essex, Dept Biol Sci, John Tabor Labs, Colchester CO4 3SQ,Essex, England Univ Essex Colchester Essex England CO4 3SQ SQ, Essex, England
Citazione:
M.J. Martin et al., "A process-based model to predict the effects of climatic change on leaf isoprene emission rates", ECOL MODEL, 131(2-3), 2000, pp. 161-174

Abstract

A process-based model was constructed around the current knowledge of the biochemical pathway of isoprene synthesis, with the objective of producing a new model of high mechanistic content to simulate the effects of environmental change on rates of isoprene emission, and thus enable the prediction of emission rates under future climates. The model was based on the three potentially limiting processes underlying isoprene synthesis: pyruvate supply to provide the substrate of isoprene carbon, supply of adenosine triphosphate (ATP) for phosphorylation to dimethylallyl pyrophosphate (DMAPP), and the rate of isoprene synthesis from DMAPP, which was controlled by the temperature dependency of the enzyme isoprene synthase. Using mechanistic methods wherever possible, model simulations predicted the relative effects of changing photon flux density, carbon dioxide concentrations and temperature on leaf isoprene emission rates. The model was used to predict the interactive effects of elevated concentrations of carbon dioxide and temperature onrates of isoprene emission. Simulations indicated that the effects of carbon dioxide and temperature on isoprene emission rates were complicated by the interactive effects of two of the controlling rate-limiting processes inthe synthesis of isoprene, namely phosphorylation rates and isoprene synthase activity. Under present concentrations of carbon dioxide and at photon flux density levels above ca. 500 mu mol m(-2) s(-1) the controlling rate process is the temperature dependency of isoprene synthase. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 11:50:10