Interactions between leaf phenological type and functional traits drive variation in isoprene emissions in central Amazon forest trees
The Amazon forest is the largest source of isoprene emissions, and the seasonal pattern of leaf-out phenology in this forest has been indicated as an important driver of seasonal variation in emissions. Still, it is unclear how emissions vary between different leaf phenological types in this forest. To evaluate the influence of leaf phenological type over isoprene emissions, we measured leaf-level isoprene emission capacity and leaf functional traits for 175 trees from 124 species of angiosperms distributed among brevideciduous and evergreen trees in a central Amazon forest. Evergreen isoprene emitters were less likely to store monoterpenes and had tougher and less photosynthetically active leaves with higher carbon-to-nitrogen ratios compared to non-emitters. Isoprene emission rates in brevideciduous trees were higher with a higher diversity of stored sesquiterpenes and total phenolics content. Our results suggest that the way isoprene emissions relate to growth and defense traits in central Amazon trees might be influenced by leaf phenological type, and that isoprene may participate in co-regulating a chemical-mechanical defense trade-off between brevideciduous and evergreen trees. Such knowledge can be used to improve emission estimates based on leaf phenological type since, as a highly-emitted biogenic volatile organic compound (BVOC), isoprene affects atmospheric processes with implications for the Earth's radiative balance.
Authors
- Vinícius Fernandes de Souza (ORCID: https://orcid.org/0000-0002-7146-5492)
- Tyeen Taylor (ORCID: https://orcid.org/0000-0002-0926-098X)
- Caroline Dutra Lacerda (ORCID: https://orcid.org/0000-0001-6363-7365)
- Lucas Falcão (ORCID: https://orcid.org/0000-0003-2419-1748)
- Axel Schmidt (ORCID: https://orcid.org/0000-0002-4318-0799)
- Eliane Gomes Alves (ORCID: https://orcid.org/0000-0001-5245-1952)
- Ülo Niinemets (ORCID: https://orcid.org/0000-0002-3078-2192)
- Christine Römermann (ORCID: https://orcid.org/0000-0003-3471-0951)
- Michelle Robin (ORCID: https://orcid.org/0000-0003-2280-9436)
- Davieliton Mesquita Pinho
- Bruce Nelson (ORCID: https://orcid.org/0000-0002-0488-6895)
- Jianbei Huang (ORCID: https://orcid.org/0000-0001-5286-5645)
- Jonathan Gershenzon (ORCID: https://orcid.org/0000-0002-1812-1551)
- Sérgio Duvoisin (ORCID: https://orcid.org/0000-0003-2577-7898)
Institutions
- Instituto Nacional de Pesquisas da Amazônia (BR)
- Estonian University of Life Sciences (EE)
- University of Michigan (US)
- German Centre for Integrative Biodiversity Research (DE)
- Max Planck Institute for Chemical Ecology (DE)
- Universidade do Estado do Amazonas (BR)
- Max Planck Institute for Biogeochemistry (DE)
- Friedrich Schiller University Jena (DE)
Publication Details
- Journal
- Frontiers in Plant Science
- Published
- 2024-12-24
- DOI
- https://doi.org/10.3389/fpls.2024.1522606
- Citations
- 4
- Primary Topic
- Plant and animal studies
- Type
- article
- Field-Weighted Citation Impact
- 4.12
Funders
- International Max Planck Research School for Environmental, Cellular and Molecular Microbiology
- Bundesministerium für Bildung und Forschung
- Financiadora de Estudos e Projetos
- Fundação de Amparo à Pesquisa do Estado do Amazonas
- Instituto Nacional de Pesquisas da Amazônia
- Ministério da Ciência, Tecnologia, Inovações e Comunicações
- International Max Planck Research School for Advanced Methods in Process and Systems Engineering
- International Max Planck Research School for global Biogeochemical Cycles