Article
 

Within-stem variation of respiration in Pseudotsuga menziesii (Douglas-fir) trees

Pubblico Deposited

Contenuto scaricabile

Scarica il pdf
https://ir.library.oregonstate.edu/concern/articles/h128nf11c

Descriptions

Attribute NameValues
Creator
Abstract
  • • A technique for measuring in vitro respiration was investigated to understand why rates were higher than those reported in vivo and to elucidate trends within mature Pseudotsuga menziesii (Douglas‐fir) trees. • Extracted increment cores were divided into 3–4 radial depths and a gas chromatograph was used to compare respiration rates radially and vertically within stems. • Respiration of inner bark was 2–3 times greater than sapwood, and 50–70% higher in outer than inner sapwood. Inner bark and outer sapwood released > 40% more CO2 at treetops than at bases. Trends were robust for CO2 production on a core dry‐mass, volume, or total carbon basis. By contrast, CO2 production on a nitrogen basis showed almost no significant variation. • This in vitro technique provided an effective index for relative differences in respiration within tree stems. Discrepancies between in vitro and in vivo measurements might be related to the gaseous environment in stems. The estimated within‐stem gradients in respiration were possibly determined by enzyme quantity and availability and could be useful in scaling to whole‐trees.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Pruyn, M. L., B. L. Gartner, and M. E. Harmon. 2002. Within-stem variation of respiration in Pseudotsuga menziesii (Douglas-fir) trees. New Phytologist 154: 359-372.
Journal Title
Journal Volume
  • 154
Journal Issue/Number
  • 2
Academic Affiliation
Subject
Dichiarazione dei diritti
Publisher
Language
Replaces

Le relazioni

Parents:

This work has no parents.

Elementi

Thumbnail Titolo Data caricata Visibilità Azioni
file details 02-Pruyn-Df-resp.pdf 2017-07-06 Pubblico Scaricare