Evidence for 13C/12C fractionation between tree leaves and wood

Steven Leavitt, Austin Long

Research output: Contribution to journalArticle

132 Citations (Scopus)

Abstract

An isotopic fractionation step between carbon fixed in the leaves and that assimilated into wood cellulose has not previously been included in atmosphere-plant fractionation models. Data presented here, however, show that the magnitude of such a fractionation step may be significant. In an experiment which involved 10 juniper trees from around Arizona, cellulose of leaves was found to be isotopically lighter than that of the corresponding tree rings in all trees by an average of 2‰. In a second experiment, the δ13C of leaf material from a juniper tree sampled at monthly intervals was compared with the δ13C of the corresponding ring. For cellulose, δ13C of the wood varied with changes in δ13C of the leaves and was persistently isotopically heavier by 3-4‰. Furthermore, the observed change in δ13C through the growing season suggests a temperature coefficient of about -0.27‰ °C-1. The direction of this leaf-wood fractionation precludes diffusion processes as the primary cause.

Original languageEnglish (US)
Pages (from-to)742-744
Number of pages3
JournalNature
Volume298
Issue number5876
DOIs
StatePublished - 1982

Fingerprint

fractionation
cellulose
leaves
isotope fractionation
growth rings
growing season
carbon
temperature

ASJC Scopus subject areas

  • General

Cite this

Evidence for 13C/12C fractionation between tree leaves and wood. / Leavitt, Steven; Long, Austin.

In: Nature, Vol. 298, No. 5876, 1982, p. 742-744.

Research output: Contribution to journalArticle

Leavitt, Steven ; Long, Austin. / Evidence for 13C/12C fractionation between tree leaves and wood. In: Nature. 1982 ; Vol. 298, No. 5876. pp. 742-744.
@article{a5ba278eaa1f4ff8bde9c6a6b29dc456,
title = "Evidence for 13C/12C fractionation between tree leaves and wood",
abstract = "An isotopic fractionation step between carbon fixed in the leaves and that assimilated into wood cellulose has not previously been included in atmosphere-plant fractionation models. Data presented here, however, show that the magnitude of such a fractionation step may be significant. In an experiment which involved 10 juniper trees from around Arizona, cellulose of leaves was found to be isotopically lighter than that of the corresponding tree rings in all trees by an average of 2‰. In a second experiment, the δ13C of leaf material from a juniper tree sampled at monthly intervals was compared with the δ13C of the corresponding ring. For cellulose, δ13C of the wood varied with changes in δ13C of the leaves and was persistently isotopically heavier by 3-4‰. Furthermore, the observed change in δ13C through the growing season suggests a temperature coefficient of about -0.27‰ °C-1. The direction of this leaf-wood fractionation precludes diffusion processes as the primary cause.",
author = "Steven Leavitt and Austin Long",
year = "1982",
doi = "10.1038/298742a0",
language = "English (US)",
volume = "298",
pages = "742--744",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "5876",

}

TY - JOUR

T1 - Evidence for 13C/12C fractionation between tree leaves and wood

AU - Leavitt, Steven

AU - Long, Austin

PY - 1982

Y1 - 1982

N2 - An isotopic fractionation step between carbon fixed in the leaves and that assimilated into wood cellulose has not previously been included in atmosphere-plant fractionation models. Data presented here, however, show that the magnitude of such a fractionation step may be significant. In an experiment which involved 10 juniper trees from around Arizona, cellulose of leaves was found to be isotopically lighter than that of the corresponding tree rings in all trees by an average of 2‰. In a second experiment, the δ13C of leaf material from a juniper tree sampled at monthly intervals was compared with the δ13C of the corresponding ring. For cellulose, δ13C of the wood varied with changes in δ13C of the leaves and was persistently isotopically heavier by 3-4‰. Furthermore, the observed change in δ13C through the growing season suggests a temperature coefficient of about -0.27‰ °C-1. The direction of this leaf-wood fractionation precludes diffusion processes as the primary cause.

AB - An isotopic fractionation step between carbon fixed in the leaves and that assimilated into wood cellulose has not previously been included in atmosphere-plant fractionation models. Data presented here, however, show that the magnitude of such a fractionation step may be significant. In an experiment which involved 10 juniper trees from around Arizona, cellulose of leaves was found to be isotopically lighter than that of the corresponding tree rings in all trees by an average of 2‰. In a second experiment, the δ13C of leaf material from a juniper tree sampled at monthly intervals was compared with the δ13C of the corresponding ring. For cellulose, δ13C of the wood varied with changes in δ13C of the leaves and was persistently isotopically heavier by 3-4‰. Furthermore, the observed change in δ13C through the growing season suggests a temperature coefficient of about -0.27‰ °C-1. The direction of this leaf-wood fractionation precludes diffusion processes as the primary cause.

UR - http://www.scopus.com/inward/record.url?scp=0000277041&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000277041&partnerID=8YFLogxK

U2 - 10.1038/298742a0

DO - 10.1038/298742a0

M3 - Article

AN - SCOPUS:0000277041

VL - 298

SP - 742

EP - 744

JO - Nature

JF - Nature

SN - 0028-0836

IS - 5876

ER -