Diurnal and seasonal variation in light and dark respiration in fieldgrown Eucalyptus pauciflora

Altmetric Citations
Way, Danielle; Holly, Chris; Bruhn, Dan; Ball, Marilyn; Atkin, Owen
Description
Respiration from vegetation is a substantial part of the global carbon cycle and the responses of plant respiration to daily and seasonal fluctuations in temperature and light must be incorporated in models of terrestrial respiration to accurately predict these CO<inf>2</inf> fluxes. We investigated how leaf respiration (R) responded to changes in leaf temperature (T<inf>leaf</inf>) and irradiance in fieldgrown saplings of an evergreen tree (Eucalyptus pauciflora Sieb. ex Spreng). Seasonal...[Show more]
dc.contributor.author  Way, Danielle  

dc.contributor.author  Holly, Chris  
dc.contributor.author  Bruhn, Dan  
dc.contributor.author  Ball, Marilyn  
dc.contributor.author  Atkin, Owen  
dc.date.accessioned  20151210T22:53:44Z  
dc.identifier.issn  0829318X  
dc.identifier.uri  http://hdl.handle.net/1885/59476  
dc.description.abstract  Respiration from vegetation is a substantial part of the global carbon cycle and the responses of plant respiration to daily and seasonal fluctuations in temperature and light must be incorporated in models of terrestrial respiration to accurately predict these CO<inf>2</inf> fluxes. We investigated how leaf respiration (R) responded to changes in leaf temperature (T<inf>leaf</inf>) and irradiance in fieldgrown saplings of an evergreen tree (Eucalyptus pauciflora Sieb. ex Spreng). Seasonal shifts in the thermal sensitivity of leaf R in the dark (R<inf>dark</inf>) and in the light (R<inf>light</inf>) were assessed by allowing T<inf>leaf</inf> to vary over the day in fieldgrown leaves over a year. The Q<inf>10</inf> of R (i.e., the relative increase in R for a 10 °C increase in T<inf>leaf</inf>) was similar for R<inf>light</inf> and R<inf>dark</inf> and had a value of ∼2.5; there was little seasonal change in the Q<inf>10</inf> of either R<inf>light</inf> or R<inf>dark</inf>, indicating that we may be able to use similar functions to model shortTerm temperature responses of R in the dark and in the light. Overall, rates of R<inf>light</inf> were lower than those of R<inf>dark</inf>, and the ratio of R<inf>light</inf>/R<inf>dark</inf> tended to increase with rising T<inf>leaf</inf>, such that light suppression of R was reduced at high T<inf>leaf</inf> values, in contrast to earlier work with this species. Our results suggest we cannot assume that R<inf>light</inf>/R<inf>dark</inf> decreases with increasing T<inf>leaf</inf> on daily timescales, and highlights the need for a better mechanistic understanding of what regulates light suppression of R in leaves.  
dc.publisher  Heron Publishing  
dc.source  Tree Physiology  
dc.title  Diurnal and seasonal variation in light and dark respiration in fieldgrown Eucalyptus pauciflora  
dc.type  Journal article  
local.description.notes  Imported from ARIES  
local.identifier.citationvolume  35  
dc.date.issued  2015  
local.identifier.absfor  060705  Plant Physiology  
local.identifier.ariespublication  u4956746xPUB492  
local.type.status  Published Version  
local.contributor.affiliation  Way, Danielle , University of Western Ontario  
local.contributor.affiliation  Holly, Chris, College of Engineering and Computer Science, ANU  
local.contributor.affiliation  Bruhn, Dan, The Open University  
local.contributor.affiliation  Ball, Marilyn, College of Medicine, Biology and Environment, ANU  
local.contributor.affiliation  Atkin, Owen, College of Medicine, Biology and Environment, ANU  
local.description.embargo  20371231  
local.bibliographicCitation.issue  8  
local.bibliographicCitation.startpage  840  
local.bibliographicCitation.lastpage  849  
local.identifier.doi  10.1093/treephys/tpv065  
local.identifier.absseo  970106  Expanding Knowledge in the Biological Sciences  
dc.date.updated  20151210T07:36:30Z  
local.identifier.scopusID  2s2.084940744739  
Collections  ANU Research Publications 
Download
File  Description  Size  Format  Image 

01_Way_Diurnal_and_seasonal_variation_2015.pdf  1.34 MB  Adobe PDF  Request a copy 
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.
Updated: 17 November 2022/ Responsible Officer: University Librarian/ Page Contact: Library Systems & Web Coordinator