Mesophyll diffusion conductance to CO 2: An unappreciated central player in photosynthesis

Mesophyll diffusion conductance to CO 2 is a key photosynthetic trait that has been studied intensively in the past years. The intention of the present review is to update knowledge of g m, and highlight the important unknown and controversial aspects that require future work. The photosynthetic lim...

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Detalles Bibliográficos
Autores: Flexas, Jaume, Barbour, Margaret M., Brendel, Oliver, Cabrera, H.M., Carriquí, Marc, Díaz-Espejo, Antonio, Douthe, Cyril, Dreyer, Erwin, Ferrio Díaz, Juan Pedro, Galle, Alexander, Galmés, Jeroni, Kodama, Naomi, Medrano, Hipolito, Niinemets, Ülo, Peguero Pina, José Javier, Pou, Alicia, Ribas-Carbó, Miquel, Tomas, Magdalena, Tosens, Tiina, Warren, Charles R.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2012
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/48665
Acceso en línea:https://doi.org/10.1016/j.plantsci.2012.05.009
http://hdl.handle.net/10459.1/48665
Access Level:acceso abierto
Palabra clave:Aquaporins
Climate change
Conductance
Plant hydraulics
Photosynthesi
Canvi climàtic
Descripción
Sumario:Mesophyll diffusion conductance to CO 2 is a key photosynthetic trait that has been studied intensively in the past years. The intention of the present review is to update knowledge of g m, and highlight the important unknown and controversial aspects that require future work. The photosynthetic limitation imposed by mesophyll conductance is large, and under certain conditions can be the most significant photosynthetic limitation. New evidence shows that anatomical traits, such as cell wall thickness and chloroplast distribution are amongst the stronger determinants of mesophyll conductance, although rapid variations in response to environmental changes might be regulated by other factors such as aquaporin conductance.Gaps in knowledge that should be research priorities for the near future include: how different is mesophyll conductance among phylogenetically distant groups and how has it evolved? Can mesophyll conductance be uncoupled from regulation of the water path? What are the main drivers of mesophyll conductance? The need for mechanistic and phenomenological models of mesophyll conductance and its incorporation in process-based photosynthesis models is also highlighted.

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