دورية أكاديمية
A unifying conceptual model for the environmental responses of isoprene emissions from plants
| العنوان: | A unifying conceptual model for the environmental responses of isoprene emissions from plants |
|---|---|
| المؤلفون: | Morfopoulos, C, Prentice, IC, Keenan, TF, Friedlingstein, P, Medlyn, BE, Penuelas, J, Possell, M |
| المصدر: | 1238 ; 1223 |
| بيانات النشر: | Oxford University Press |
| سنة النشر: | 2013 |
| المجموعة: | Imperial College London: Spiral |
| مصطلحات موضوعية: | Science & Technology, Life Sciences & Biomedicine, Plant Sciences, Isoprene, modelling, electron transport, photosynthesis, temperature, carbon dioxide, isoprene emission, volatile organic compounds, ATMOSPHERIC CO2 CONCENTRATION, VOLATILE ORGANIC-COMPOUNDS, SYNTHASE ACTIVITY, MONOTERPENE EMISSION, QUERCUS-ROBUR, TEMPERATURE-ACCLIMATION, TROPOSPHERIC CHEMISTRY, BIOCHEMICAL-MODEL, NITRATE REDUCTASE, BIOGENIC ISOPRENE, Butadienes, Electrons, Environment, Hemiterpenes, Light, Models, Biological, NADP, Pentanes |
| الوصف: | Background and Aims Isoprene is the most important volatile organic compound emitted by land plants in terms of abundance and environmental effects. Controls on isoprene emission rates include light, temperature, water supply and CO 2 concentration. A need to quantify these controls has long been recognized. There are already models that give 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. † Methods A simple model is presented based on the idea of balancing demands for reducing power (derived from photosynthetic electron transport) in primary metabolism versus the secondary pathway that leads to the synthesis of isoprene. This model’s ability to account for key features in a variety of experimental data sets is assessed. † Key results The 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 isoprene emission with photosynthetically active radiation (PAR) at high PAR, after carbon assimilation has saturated; (3) a maximum of isoprene emission at low internal CO 2 concentration ( c i ) and an asymptotic decline thereafter with in- creasing c i ; (4) maintenance of high isoprene emissions when carbon assimilation is restricted by drought; and (5) a temperature optimum higher than that of photosynthesis, but lower than that of isoprene synthase activity. † Conclusions A simple model was used to test the hypothesisthat reducing poweravailable to the synthesis pathway for 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 observed decoupling between carbon assimilation and isoprene emission. The concept has the potential to improve global- scale modelling of vegetation isoprene ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0305-7364 |
| العلاقة: | ANNALS OF BOTANY; http://hdl.handle.net/10044/1/56725Test; https://dx.doi.org/10.1093/aob/mct206Test |
| DOI: | 10.1093/aob/mct206 |
| الإتاحة: | https://doi.org/10.1093/aob/mct206Test http://hdl.handle.net/10044/1/56725Test |
| حقوق: | © The Author 2013. Published by Oxford University Press on behalf of the Annals of Botany Company. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0Test/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| رقم الانضمام: | edsbas.B3081652 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 03057364 |
|---|---|
| DOI: | 10.1093/aob/mct206 |