Cargando…

Stomatal CO(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits

Stomatal CO(2) responsiveness and photosynthetic capacity vary greatly among plant species, but the factors controlling these physiological leaf traits are often poorly understood. To explore if these traits are linked to taxonomic group identity and/or to other plant functional traits, we investiga...

Descripción completa

Detalles Bibliográficos
Autores principales: Hasper, Thomas B., Dusenge, Mirindi E., Breuer, Friederike, Uwizeye, Félicien K., Wallin, Göran, Uddling, Johan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5408058/
https://www.ncbi.nlm.nih.gov/pubmed/28260113
http://dx.doi.org/10.1007/s00442-017-3829-0
_version_ 1783232222551080960
author Hasper, Thomas B.
Dusenge, Mirindi E.
Breuer, Friederike
Uwizeye, Félicien K.
Wallin, Göran
Uddling, Johan
author_facet Hasper, Thomas B.
Dusenge, Mirindi E.
Breuer, Friederike
Uwizeye, Félicien K.
Wallin, Göran
Uddling, Johan
author_sort Hasper, Thomas B.
collection PubMed
description Stomatal CO(2) responsiveness and photosynthetic capacity vary greatly among plant species, but the factors controlling these physiological leaf traits are often poorly understood. To explore if these traits are linked to taxonomic group identity and/or to other plant functional traits, we investigated the short-term stomatal CO(2) responses and the maximum rates of photosynthetic carboxylation (V (cmax)) and electron transport (J (max)) in an evolutionary broad range of tropical woody plant species. The study included 21 species representing four major seed plant taxa: gymnosperms, monocots, rosids and asterids. We found that stomatal closure responses to increased CO(2) were stronger in angiosperms than in gymnosperms, and in monocots compared to dicots. Stomatal CO(2) responsiveness was not significantly related to any of the other functional traits investigated, while a parameter describing the relationship between photosynthesis and stomatal conductance in combined leaf gas exchange models (g (1)) was related to leaf area-specific plant hydraulic conductance. For photosynthesis, we found that the interspecific variation in V (cmax) and J (max) was related to within leaf nitrogen (N) allocation rather than to area-based total leaf N content. Within-leaf N allocation and water use were strongly co-ordinated (r (2) = 0.67), such that species with high fractional N investments into compounds maximizing photosynthetic capacity also had high stomatal conductance. We conclude that while stomatal CO(2) responsiveness of tropical woody species seems poorly related to other plant functional traits, photosynthetic capacity is linked to fractional within-leaf N allocation rather than total leaf N content and is closely co-ordinated with leaf water use. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00442-017-3829-0) contains supplementary material, which is available to authorized users.
format Online
Article
Text
id pubmed-5408058
institution National Center for Biotechnology Information
language English
publishDate 2017
publisher Springer Berlin Heidelberg
record_format MEDLINE/PubMed
spelling pubmed-54080582017-05-15 Stomatal CO(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits Hasper, Thomas B. Dusenge, Mirindi E. Breuer, Friederike Uwizeye, Félicien K. Wallin, Göran Uddling, Johan Oecologia Physiological Ecology - Original Research Stomatal CO(2) responsiveness and photosynthetic capacity vary greatly among plant species, but the factors controlling these physiological leaf traits are often poorly understood. To explore if these traits are linked to taxonomic group identity and/or to other plant functional traits, we investigated the short-term stomatal CO(2) responses and the maximum rates of photosynthetic carboxylation (V (cmax)) and electron transport (J (max)) in an evolutionary broad range of tropical woody plant species. The study included 21 species representing four major seed plant taxa: gymnosperms, monocots, rosids and asterids. We found that stomatal closure responses to increased CO(2) were stronger in angiosperms than in gymnosperms, and in monocots compared to dicots. Stomatal CO(2) responsiveness was not significantly related to any of the other functional traits investigated, while a parameter describing the relationship between photosynthesis and stomatal conductance in combined leaf gas exchange models (g (1)) was related to leaf area-specific plant hydraulic conductance. For photosynthesis, we found that the interspecific variation in V (cmax) and J (max) was related to within leaf nitrogen (N) allocation rather than to area-based total leaf N content. Within-leaf N allocation and water use were strongly co-ordinated (r (2) = 0.67), such that species with high fractional N investments into compounds maximizing photosynthetic capacity also had high stomatal conductance. We conclude that while stomatal CO(2) responsiveness of tropical woody species seems poorly related to other plant functional traits, photosynthetic capacity is linked to fractional within-leaf N allocation rather than total leaf N content and is closely co-ordinated with leaf water use. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s00442-017-3829-0) contains supplementary material, which is available to authorized users. Springer Berlin Heidelberg 2017-03-04 2017 /pmc/articles/PMC5408058/ /pubmed/28260113 http://dx.doi.org/10.1007/s00442-017-3829-0 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Physiological Ecology - Original Research
Hasper, Thomas B.
Dusenge, Mirindi E.
Breuer, Friederike
Uwizeye, Félicien K.
Wallin, Göran
Uddling, Johan
Stomatal CO(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits
title Stomatal CO(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits
title_full Stomatal CO(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits
title_fullStr Stomatal CO(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits
title_full_unstemmed Stomatal CO(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits
title_short Stomatal CO(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits
title_sort stomatal co(2) responsiveness and photosynthetic capacity of tropical woody species in relation to taxonomy and functional traits
topic Physiological Ecology - Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5408058/
https://www.ncbi.nlm.nih.gov/pubmed/28260113
http://dx.doi.org/10.1007/s00442-017-3829-0
work_keys_str_mv AT hasperthomasb stomatalco2responsivenessandphotosyntheticcapacityoftropicalwoodyspeciesinrelationtotaxonomyandfunctionaltraits
AT dusengemirindie stomatalco2responsivenessandphotosyntheticcapacityoftropicalwoodyspeciesinrelationtotaxonomyandfunctionaltraits
AT breuerfriederike stomatalco2responsivenessandphotosyntheticcapacityoftropicalwoodyspeciesinrelationtotaxonomyandfunctionaltraits
AT uwizeyefelicienk stomatalco2responsivenessandphotosyntheticcapacityoftropicalwoodyspeciesinrelationtotaxonomyandfunctionaltraits
AT wallingoran stomatalco2responsivenessandphotosyntheticcapacityoftropicalwoodyspeciesinrelationtotaxonomyandfunctionaltraits
AT uddlingjohan stomatalco2responsivenessandphotosyntheticcapacityoftropicalwoodyspeciesinrelationtotaxonomyandfunctionaltraits