ArticleAnnals of botany2007
Daytime depression in tree stem CO2 efflux rates: is it caused by low stem turgor pressure?
Article in Annals of botany, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 63 citations in OpenAlex.
- Does lower water availability limit stem COAoB PLANTS · 2024Article
- Development of a lightweight, portable, waterproof, and low power stem respiration system for trees.MethodsX · 2023Article
- Bark Transpiration Rates Can Reach Needle Transpiration Rates Under Dry Conditions in a Semi-arid Forest.Frontiers in plant science · 2021Article
- Diel patterns of stem COPlant signaling & behavior · 2020Article
- Vertical Strata and Stem Carbon Dioxide Efflux inPlants (Basel, Switzerland) · 2020Article
- Article
- Introducing turgor-driven growth dynamics into functional-structural plant models.Annals of botany · 2018Article
- Temporal dynamics and vertical variations in stem COJournal of plant research · 2017Article
- TreeWatch.net: A Water and Carbon Monitoring and Modeling Network to Assess Instant Tree Hydraulics and Carbon Status.Frontiers in plant science · 2016Article
- Seasonal variation in CO2 efflux of stems and branches of Norway spruce trees.Annals of botany · 2008Article
- Stem respiration and carbon dioxide efflux of young Populus deltoides trees in relation to temperature and xylem carbon dioxide concentration.Oecologia · 2008Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsDaytime CO2 efflux rates (FCO2) from tree stems are often reported to be lower than expected from the exponential relationship between temperature and respiration. Explanations of daytime depression in FCO2 have focused on the possible role of internal CO2 transport in the xylem. However, another possible cause that has been overlooked is the daily dynamics of the water status in the living stem tissues and its influence on stem growth rate and thus respiration. The objective of this study was to assess the daily dynamics of stem water status and growth rate and to determine the extent to which they may be linked to daily variations in stem FCO2.
methodsFCO2 of young beech and oak stems were measured under controlled conditions. Relative stem turgor pressure (Psi(p)), obtained from simulations with the 'RCGro' model, was used as an indicator of the water status in the living stem tissues. Daily dynamics of stem growth were derived from Psi(p): growth was assumed to occur when Psi(p) exceeded a relative threshold value. KEY
resultsThere was a strong correspondence between fluctuations in FCO2 and simulated Psi(p). The non-growth conditions during daytime coincided with depressions in FCO2. Moreover, FCO2 responded to changes in Psi(p) in the absence of growth, indicating also that maintenance processes were influenced by the water status in the living stem tissues.
conclusionsDaytime depressions in stem FCO2 correlate with the daily dynamics of turgor, as a measure of the water status in the living stem tissues: it is suggested that water status of tree stems is a potentially important determinant of stem FCO2, as it influences the rate of growth and maintenance processes in the living tissues of the stem.
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