@article{Morfopoulos:2013:aob/mct206,
author = {Morfopoulos, C and Prentice, IC and Keenan, TF and Friedlingstein, P and Medlyn, BE and Penuelas, J and Possell, M},
doi = {aob/mct206},
journal = {ANNALS OF BOTANY},
pages = {1223--1238},
title = {A unifying conceptual model for the environmental responses of isoprene emissions from plants},
url = {http://dx.doi.org/10.1093/aob/mct206},
volume = {112},
year = {2013}
}
TY - JOUR
AB - Background and AimsIsoprene is the most important volatile organic compound emitted by land plants in terms ofabundance and environmental effects. Controls on isoprene emission rates include light, temperature, water supplyand CO2concentration. A need to quantify these controls has long been recognized. There are already models thatgive realistic results, but they are complex, highly empirical and require separate responses to different drivers.This study sets out to find a simpler, unifying principle.†MethodsA simple model is presented based on the idea of balancing demands for reducing power (derived fromphotosynthetic electron transport) in primary metabolism versus the secondary pathway that leads to the synthesisof isoprene. This model’s ability to account for key features in a variety of experimental data sets is assessed.†Key resultsThe model simultaneously predicts the fundamental responses observed in short-term experiments,namely: (1) the decoupling between carbon assimilation and isoprene emission; (2) a continued increase in isopreneemission with photosynthetically active radiation (PAR) at high PAR, after carbon assimilation has saturated; (3) amaximum of isoprene emission at low internal CO2concentration (ci) and an asymptotic decline thereafter with in-creasingci; (4) maintenance of high isoprene emissions when carbon assimilation is restricted by drought; and (5) atemperature optimum higher than that of photosynthesis, but lower than that of isoprene synthase activity.†ConclusionsA simple model was used to test the hypothesisthat reducing poweravailable to the synthesis pathwayfor isoprene varies according to the extent to which the needs of carbon assimilation are satisfied. Despite its simpli-city the model explains much in terms of the observed response of isoprene to external drivers as well asthe observeddecoupling between carbon assimilation and isoprene emission. The concept has the potential to improve global-scale
AU - Morfopoulos,C
AU - Prentice,IC
AU - Keenan,TF
AU - Friedlingstein,P
AU - Medlyn,BE
AU - Penuelas,J
AU - Possell,M
DO - aob/mct206
EP - 1238
PY - 2013///
SN - 0305-7364
SP - 1223
TI - A unifying conceptual model for the environmental responses of isoprene emissions from plants
T2 - ANNALS OF BOTANY
UR - http://dx.doi.org/10.1093/aob/mct206
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000326289900010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/56725
VL - 112
ER -