Xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species
BACKGROUND AND AIMS: Trees adjust the configuration of their conductive system in response to changes in water availability, maximizing efficiency in wet environments and increasing safety in dry habitats. However, evidence of this general trend is not conclusive. Generalist species growing across b...
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ftpubmed:oai:pubmedcentral.nih.gov:6110345 2023-05-15T14:04:38+02:00 Xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species García-Cervigón, Ana I Olano, José M von Arx, Georg Fajardo, Alex 2018-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6110345/ http://www.ncbi.nlm.nih.gov/pubmed/29800073 https://doi.org/10.1093/aob/mcy088 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6110345/ http://www.ncbi.nlm.nih.gov/pubmed/29800073 http://dx.doi.org/10.1093/aob/mcy088 © The Author(s) 2018. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) Original Articles Text 2018 ftpubmed https://doi.org/10.1093/aob/mcy088 2019-09-01T00:08:37Z BACKGROUND AND AIMS: Trees adjust the configuration of their conductive system in response to changes in water availability, maximizing efficiency in wet environments and increasing safety in dry habitats. However, evidence of this general trend is not conclusive. Generalist species growing across broad climatic gradients provide an ideal framework to assess intra-specific xylem adjustments under contrasting environmental conditions. Our aims were to compare the response of xylem traits to variations in precipitation of two co-occurring generalist tree species, and to assess climate control on xylem trait variability and co-ordination. METHODS: We evaluated xylem traits of Embothrium coccineum (Proteaceae, evergreen) and Nothofagus antarctica (Nothofagaceae, deciduous) in three areas across an abrupt precipitation gradient, from 500 to 2500 mm, in southern Chile. We measured wood density, vessel lumen area and density, percentage of conductive area and vessel grouping, and estimated the hydraulic function from anatomical measurements in 60 individuals per species. KEY RESULTS: Both species shared a common pattern of response along the precipitation gradient, with an increase in vessel density with dryness, but without changes in estimated hydraulic conductivity. Xylem traits in E. coccineum were more variable and more responsive to the climate gradient, decreasing vessel lumen area and increasing wood density, whereas vessel grouping showed contrasting patterns between species. Additionally, the analysis of trait co-ordination at the individual level revealed a tighter co-ordination among xylem traits in E. coccineum. CONCLUSIONS: Estimated xylem efficiency was maintained in combination with different levels of expected xylem safety within species. Reduction in vessel lumen area was compensated through large increases in vessel density, thus breaking the trade-off between xylem efficiency and safety. Otherwise, the existence of alternative internal adjustments in coexisting species to face similar climatic ... Text Antarc* Antarctica PubMed Central (PMC) Annals of Botany 122 3 461 472 |
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Original Articles García-Cervigón, Ana I Olano, José M von Arx, Georg Fajardo, Alex Xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species |
topic_facet |
Original Articles |
description |
BACKGROUND AND AIMS: Trees adjust the configuration of their conductive system in response to changes in water availability, maximizing efficiency in wet environments and increasing safety in dry habitats. However, evidence of this general trend is not conclusive. Generalist species growing across broad climatic gradients provide an ideal framework to assess intra-specific xylem adjustments under contrasting environmental conditions. Our aims were to compare the response of xylem traits to variations in precipitation of two co-occurring generalist tree species, and to assess climate control on xylem trait variability and co-ordination. METHODS: We evaluated xylem traits of Embothrium coccineum (Proteaceae, evergreen) and Nothofagus antarctica (Nothofagaceae, deciduous) in three areas across an abrupt precipitation gradient, from 500 to 2500 mm, in southern Chile. We measured wood density, vessel lumen area and density, percentage of conductive area and vessel grouping, and estimated the hydraulic function from anatomical measurements in 60 individuals per species. KEY RESULTS: Both species shared a common pattern of response along the precipitation gradient, with an increase in vessel density with dryness, but without changes in estimated hydraulic conductivity. Xylem traits in E. coccineum were more variable and more responsive to the climate gradient, decreasing vessel lumen area and increasing wood density, whereas vessel grouping showed contrasting patterns between species. Additionally, the analysis of trait co-ordination at the individual level revealed a tighter co-ordination among xylem traits in E. coccineum. CONCLUSIONS: Estimated xylem efficiency was maintained in combination with different levels of expected xylem safety within species. Reduction in vessel lumen area was compensated through large increases in vessel density, thus breaking the trade-off between xylem efficiency and safety. Otherwise, the existence of alternative internal adjustments in coexisting species to face similar climatic ... |
format |
Text |
author |
García-Cervigón, Ana I Olano, José M von Arx, Georg Fajardo, Alex |
author_facet |
García-Cervigón, Ana I Olano, José M von Arx, Georg Fajardo, Alex |
author_sort |
García-Cervigón, Ana I |
title |
Xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species |
title_short |
Xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species |
title_full |
Xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species |
title_fullStr |
Xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species |
title_full_unstemmed |
Xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species |
title_sort |
xylem adjusts to maintain efficiency across a steep precipitation gradient in two coexisting generalist species |
publisher |
Oxford University Press |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6110345/ http://www.ncbi.nlm.nih.gov/pubmed/29800073 https://doi.org/10.1093/aob/mcy088 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6110345/ http://www.ncbi.nlm.nih.gov/pubmed/29800073 http://dx.doi.org/10.1093/aob/mcy088 |
op_rights |
© The Author(s) 2018. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) |
op_doi |
https://doi.org/10.1093/aob/mcy088 |
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Annals of Botany |
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122 |
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3 |
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461 |
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472 |
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1766275840521273344 |