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Plant function and evolutionary biology
REVIEW

Stable oxygen isotope composition of plant tissue: a review

Margaret M. Barbour
+ Author Affiliations
- Author Affiliations

A Landcare Research, PO Box 40, Gerald St, Lincoln 7640, New Zealand.
Email: barbourm@landcareresearch.co.nz

B This review originates from the Outstanding Physiologist Award 2006 of the New Zealand Society of Plant Biologists received by the author

Functional Plant Biology 34(2) 83-94 https://doi.org/10.1071/FP06228
Submitted: 13 September 2006  Accepted: 20 November 2006   Published: 12 February 2007

Abstract

With the development of rapid measurement techniques, stable oxygen isotope analysis of plant tissue is poised to become an important tool in plant physiological, ecological, paleoclimatic and forensic studies. Recent advances in mechanistic understanding have led to the improvement of process-based models that accurately predict variability in the oxygen isotope composition of plant organic material (δ18Op). δ18Op has been shown to reflect the isotope composition of soil water, evaporative enrichment in transpiring leaves, and isotopic exchange between oxygen atoms in organic molecules and local water in the cells in which organic molecules are formed. This review presents current theoretical models describing the influences on δ18Op, using recently published experimental work to outline strengths and weaknesses in the models. The potential and realised applications of the technique are described.

Additional keywords: crop yield, leaf water enrichment, palaeoclimate, Péclet effect, stomatal conductance.


Acknowledgements

LA Cernusak, C Keitel and BR Helliker are thanked for valuable comments on an early draft of the manuscript, and MA Adams and an anonymous reviewer for their suggestions. Preparation of this review was funded by the Foundation for Science, Research and Technology, New Zealand.


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