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Isometric scaling to model water transport in conifer tree rings across time and environments

The hydraulic properties of xylem determine the ability of plants to efficiently and safely provide water to their leaves. These properties are key to understanding plant responses to environmental conditions and evaluating their fate under a rapidly changing climate. However, their assessment is hi...

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Autores principales: Sviderskaya, Irina V, Vaganov, Eugene A, Fonti, Marina V, Fonti, Patrick
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8006552/
https://www.ncbi.nlm.nih.gov/pubmed/33367718
http://dx.doi.org/10.1093/jxb/eraa595
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author Sviderskaya, Irina V
Vaganov, Eugene A
Fonti, Marina V
Fonti, Patrick
author_facet Sviderskaya, Irina V
Vaganov, Eugene A
Fonti, Marina V
Fonti, Patrick
author_sort Sviderskaya, Irina V
collection PubMed
description The hydraulic properties of xylem determine the ability of plants to efficiently and safely provide water to their leaves. These properties are key to understanding plant responses to environmental conditions and evaluating their fate under a rapidly changing climate. However, their assessment is hindered by the challenges of quantifying basic hydraulic components such as bordered pits and tracheids. Here, we use isometric scaling between tracheids and pit morphology to merge partial hydraulic models of the tracheid component and to upscale these properties to the tree-ring level in conifers. Our new model output is first cross-validated with the literature and then applied to cell anatomical measurements from Larix sibirica tree rings formed under harsh conditions in southern Siberia to quantify the intra- and inter-annual variability in hydraulic properties. The model provides a means of assessing how different-sized tracheid components contribute to the hydraulic properties of the ring. Upscaled results indicate that natural inter- and intra-ring anatomical variations have a substantial impact on the tree’s hydraulic properties. Our model facilitates the assessment of important xylem functional attributes because it requires only the more accessible measures of cross-sectional tracheid size. This approach, if applied to dated tree rings, provides a novel way to investigate xylem structure–function relationships across time and environmental conditions.
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spelling pubmed-80065522021-04-02 Isometric scaling to model water transport in conifer tree rings across time and environments Sviderskaya, Irina V Vaganov, Eugene A Fonti, Marina V Fonti, Patrick J Exp Bot Research Papers The hydraulic properties of xylem determine the ability of plants to efficiently and safely provide water to their leaves. These properties are key to understanding plant responses to environmental conditions and evaluating their fate under a rapidly changing climate. However, their assessment is hindered by the challenges of quantifying basic hydraulic components such as bordered pits and tracheids. Here, we use isometric scaling between tracheids and pit morphology to merge partial hydraulic models of the tracheid component and to upscale these properties to the tree-ring level in conifers. Our new model output is first cross-validated with the literature and then applied to cell anatomical measurements from Larix sibirica tree rings formed under harsh conditions in southern Siberia to quantify the intra- and inter-annual variability in hydraulic properties. The model provides a means of assessing how different-sized tracheid components contribute to the hydraulic properties of the ring. Upscaled results indicate that natural inter- and intra-ring anatomical variations have a substantial impact on the tree’s hydraulic properties. Our model facilitates the assessment of important xylem functional attributes because it requires only the more accessible measures of cross-sectional tracheid size. This approach, if applied to dated tree rings, provides a novel way to investigate xylem structure–function relationships across time and environmental conditions. Oxford University Press 2020-12-24 /pmc/articles/PMC8006552/ /pubmed/33367718 http://dx.doi.org/10.1093/jxb/eraa595 Text en © The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Papers
Sviderskaya, Irina V
Vaganov, Eugene A
Fonti, Marina V
Fonti, Patrick
Isometric scaling to model water transport in conifer tree rings across time and environments
title Isometric scaling to model water transport in conifer tree rings across time and environments
title_full Isometric scaling to model water transport in conifer tree rings across time and environments
title_fullStr Isometric scaling to model water transport in conifer tree rings across time and environments
title_full_unstemmed Isometric scaling to model water transport in conifer tree rings across time and environments
title_short Isometric scaling to model water transport in conifer tree rings across time and environments
title_sort isometric scaling to model water transport in conifer tree rings across time and environments
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8006552/
https://www.ncbi.nlm.nih.gov/pubmed/33367718
http://dx.doi.org/10.1093/jxb/eraa595
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