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 |
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| المؤلفون: | Belinda E. Medlyn, Malcolm Possell, Trevor F. Keenan, Iain Colin Prentice, Catherine Morfopoulos, Josep Peñuelas, Pierre Friedlingstein |
| المصدر: | Annals of Botany Annals of botany, vol 112, iss 7 |
| بيانات النشر: | Oxford University Press (OUP), 2013. |
| سنة النشر: | 2013 |
| مصطلحات موضوعية: | 0106 biological sciences, Light, Isoprene, 010504 meteorology & atmospheric sciences, Plant Biology, Plant Science, Atmospheric sciences, 7. Clean energy, 01 natural sciences, TEMPERATURE-ACCLIMATION, chemistry.chemical_compound, Models, NITRATE REDUCTASE, volatile organic compounds, Volatile organic compound, electron transport, MONOTERPENE EMISSION, media_common, chemistry.chemical_classification, Ecology, ATMOSPHERIC CO2 CONCENTRATION, biology, Forestry Sciences, Temperature, Decoupling (cosmology), Plants, Photosynthetically active radiation, Carbon dioxide, TROPOSPHERIC CHEMISTRY, BIOGENIC ISOPRENE, Life Sciences & Biomedicine, media_common.quotation_subject, Plant Biology & Botany, 0607 Plant Biology, Electrons, Isoprene synthase, VOLATILE ORGANIC-COMPOUNDS, Environment, Photosynthesis, Models, Biological, modelling, SYNTHASE ACTIVITY, Hemiterpenes, Pentanes, Butadienes, 0105 earth and related environmental sciences, Science & Technology, QUERCUS-ROBUR, photosynthesis, 0602 Ecology, Plant Sciences, BIOCHEMICAL-MODEL, carbon dioxide, 15. Life on land, Biological, chemistry, isoprene emission, 13. Climate action, biology.protein, Conceptual model, Research in Context, NADP, 010606 plant biology & botany |
| الوصف: | Author(s): Morfopoulos, Catherine; Prentice, Iain C; Keenan, Trevor F; Friedlingstein, Pierre; Medlyn, Belinda E; Penuelas, Josep; Possell, Malcolm | Abstract: Background and aimsIsoprene 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 CO2 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.MethodsA 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 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 isoprene emission with photosynthetically active radiation (PAR) at high PAR, after carbon assimilation has saturated; (3) a maximum of isoprene emission at low internal CO2 concentration (ci) and an asymptotic decline thereafter with increasing ci; (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.ConclusionsA simple model was used to test the hypothesis that reducing power available to the synthesis pathway for isoprene varies according to the extent to which the needs of carbon assimilation are satisfied. Despite its simplicity the model explains much in terms of the observed response of isoprene to external drivers as well as the observed decoupling between carbon assimilation and isoprene emission. The concept has the potential to improve global-scale modelling of vegetation isoprene emission. |
| وصف الملف: | application/pdf |
| تدمد: | 1095-8290 0305-7364 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::925e6365742ebad1c505443e703f6387Test https://doi.org/10.1093/aob/mct206Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....925e6365742ebad1c505443e703f6387 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10958290 03057364 |
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