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Genetic Regulation of Vessel Morphology in Populus

During secondary growth, forest trees can modify the anatomy of the wood produced by the vascular cambium in response to environmental conditions. Notably, the trees of the model angiosperm genus, Populus, reduce the risk of cavitation and hydraulic failure under water stress by producing water-cond...

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Autores principales: Rodriguez-Zaccaro, F. Daniela, Henry, Isabelle M., Groover, Andrew
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8419429/
https://www.ncbi.nlm.nih.gov/pubmed/34497621
http://dx.doi.org/10.3389/fpls.2021.705596
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author Rodriguez-Zaccaro, F. Daniela
Henry, Isabelle M.
Groover, Andrew
author_facet Rodriguez-Zaccaro, F. Daniela
Henry, Isabelle M.
Groover, Andrew
author_sort Rodriguez-Zaccaro, F. Daniela
collection PubMed
description During secondary growth, forest trees can modify the anatomy of the wood produced by the vascular cambium in response to environmental conditions. Notably, the trees of the model angiosperm genus, Populus, reduce the risk of cavitation and hydraulic failure under water stress by producing water-conducting vessel elements with narrow lumens, which are more numerous and more interconnected with each other. Here, we determined the genetic architecture of vessel traits affecting hydraulic physiology and resilience to water stress. Vessel traits were measured for clonally replicated genotypes of a unique Populus deltoides x nigra population carrying genomically defined insertions and deletions that create gene dosage variation. We found significant phenotypic variation for all traits measured (mean vessel diameter, height-corrected mean vessel diameter, vessel frequency, height-corrected vessel frequency, vessel grouping index, and mean vessel circularity), and that all traits were under genetic control and showed moderate heritability values, ranging from 0.32 to 0.53. Whole-genome scans of correlations between gene dosage and phenotypic traits identified quantitative trait loci for tree height, mean vessel diameter, height-corrected mean vessel diameter, height-corrected vessel frequency, and vessel grouping index. Our results demonstrate that vessel traits affecting hydraulic physiology are under genetic control, and both pleiotropic and trait-specific quantitative trait loci are found for these traits.
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spelling pubmed-84194292021-09-07 Genetic Regulation of Vessel Morphology in Populus Rodriguez-Zaccaro, F. Daniela Henry, Isabelle M. Groover, Andrew Front Plant Sci Plant Science During secondary growth, forest trees can modify the anatomy of the wood produced by the vascular cambium in response to environmental conditions. Notably, the trees of the model angiosperm genus, Populus, reduce the risk of cavitation and hydraulic failure under water stress by producing water-conducting vessel elements with narrow lumens, which are more numerous and more interconnected with each other. Here, we determined the genetic architecture of vessel traits affecting hydraulic physiology and resilience to water stress. Vessel traits were measured for clonally replicated genotypes of a unique Populus deltoides x nigra population carrying genomically defined insertions and deletions that create gene dosage variation. We found significant phenotypic variation for all traits measured (mean vessel diameter, height-corrected mean vessel diameter, vessel frequency, height-corrected vessel frequency, vessel grouping index, and mean vessel circularity), and that all traits were under genetic control and showed moderate heritability values, ranging from 0.32 to 0.53. Whole-genome scans of correlations between gene dosage and phenotypic traits identified quantitative trait loci for tree height, mean vessel diameter, height-corrected mean vessel diameter, height-corrected vessel frequency, and vessel grouping index. Our results demonstrate that vessel traits affecting hydraulic physiology are under genetic control, and both pleiotropic and trait-specific quantitative trait loci are found for these traits. Frontiers Media S.A. 2021-08-23 /pmc/articles/PMC8419429/ /pubmed/34497621 http://dx.doi.org/10.3389/fpls.2021.705596 Text en Copyright © 2021 Rodriguez-Zaccaro, Henry and Groover. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Rodriguez-Zaccaro, F. Daniela
Henry, Isabelle M.
Groover, Andrew
Genetic Regulation of Vessel Morphology in Populus
title Genetic Regulation of Vessel Morphology in Populus
title_full Genetic Regulation of Vessel Morphology in Populus
title_fullStr Genetic Regulation of Vessel Morphology in Populus
title_full_unstemmed Genetic Regulation of Vessel Morphology in Populus
title_short Genetic Regulation of Vessel Morphology in Populus
title_sort genetic regulation of vessel morphology in populus
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8419429/
https://www.ncbi.nlm.nih.gov/pubmed/34497621
http://dx.doi.org/10.3389/fpls.2021.705596
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