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General trait relationships in stems: a study on the performance and interrelationships of several functional and structural parameters involved in corticular photosynthesis

General trait relationships in stems: a study on the performance and interrelationships of... We addressed corticular photosynthesis, focusing on parameters of underlying dark and light reactions as well as structural differentiation. To unveil general stem traits and underlying principles that may be valid across several tree species, CO2 exchange rates and chlorophyll‐fluorescence parameters were measured in current‐year to 3‐year‐old stems of five deciduous tree species (including climax and pioneer species). Across species, dark CO2 efflux rates (Rd) of stems exhibited a common regression relationship with photosynthetic rates (A) and light‐adapted quantum efficiency of photosystem II (PSII) (ΔF/Fm′), a pattern analogous to leaf trait correlations. Furthermore, A and ΔF/Fm′ were closely interrelated to each other. Consistent correlations of stem structure and function were also assessed among species. Changes in tissue structure during ageing significantly affected several stem functional parameters. Stem CO2 efflux during the dark and corticular photosynthetic rates declined with increasing stem age as well as light‐adapted quantum efficiency of PSII. Furthermore, a strong relationship between stem Rd and peridermal PFD‐transmittance (T) as well as between Rd and total bark chlorophyll was evident. Consistent results were found for the relationships between corticular photosynthesis (or primary photosynthetic reactions like ΔF/Fm′) and selected structural traits. The found correlation patterns among functional and/or structural traits of stems and their concordance with leaf trait relationships may aid in identifying underlying mechanisms and scaling relationships that link traits to plant and ecosystem function. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physiologia Plantarum Wiley

General trait relationships in stems: a study on the performance and interrelationships of several functional and structural parameters involved in corticular photosynthesis

Physiologia Plantarum , Volume 134 (4) – Jan 1, 2008

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References (52)

Publisher
Wiley
Copyright
Copyright © 2008 Wiley Subscription Services
ISSN
0031-9317
eISSN
1399-3054
DOI
10.1111/j.1399-3054.2008.01165.x
pmid
19000198
Publisher site
See Article on Publisher Site

Abstract

We addressed corticular photosynthesis, focusing on parameters of underlying dark and light reactions as well as structural differentiation. To unveil general stem traits and underlying principles that may be valid across several tree species, CO2 exchange rates and chlorophyll‐fluorescence parameters were measured in current‐year to 3‐year‐old stems of five deciduous tree species (including climax and pioneer species). Across species, dark CO2 efflux rates (Rd) of stems exhibited a common regression relationship with photosynthetic rates (A) and light‐adapted quantum efficiency of photosystem II (PSII) (ΔF/Fm′), a pattern analogous to leaf trait correlations. Furthermore, A and ΔF/Fm′ were closely interrelated to each other. Consistent correlations of stem structure and function were also assessed among species. Changes in tissue structure during ageing significantly affected several stem functional parameters. Stem CO2 efflux during the dark and corticular photosynthetic rates declined with increasing stem age as well as light‐adapted quantum efficiency of PSII. Furthermore, a strong relationship between stem Rd and peridermal PFD‐transmittance (T) as well as between Rd and total bark chlorophyll was evident. Consistent results were found for the relationships between corticular photosynthesis (or primary photosynthetic reactions like ΔF/Fm′) and selected structural traits. The found correlation patterns among functional and/or structural traits of stems and their concordance with leaf trait relationships may aid in identifying underlying mechanisms and scaling relationships that link traits to plant and ecosystem function.

Journal

Physiologia PlantarumWiley

Published: Jan 1, 2008

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