Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients

Detalhes bibliográficos
Autor(a) principal: Einzmann,Helena J. R.
Data de Publicação: 2020
Outros Autores: Schickenberg,Nina, Zotz,Gerhard
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Acta Botanica Brasilica
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100066
Resumo: ABSTRACT Root morphology is expected to respond to environmental conditions. Two earlier studies reported predictable changes in the structure of the velamen radicum (common in monocotyledons) along rainfall gradients, which was expected from its assumed role in plant-water-relations. The present study expanded on this idea by analysing nine root traits that can be linked to root function, including velamen structure, along two moisture gradients of different spatial scales: 1) along the vertical gradient of a lowland forest in central Panama and 2) along a strong regional rainfall gradient in western Panama. All studied traits (e.g. velamen width, number of xylem poles, lignification of the exodermis) of the 45 orchid species showed substantial intraspecific and interspecific variation, but none of this (within forest) or very little of this (regional gradient) was related to the gradients. Only the community weighted means of velamen width, stele width and xylem pole number varied significantly with rainfall, with substantial effect sizes only found in the latter two traits. Our results clearly disagree with those of earlier publications, which did not include species abundance and/or rigorous statistics in their analyses. This discrepancy highlights that our understanding of the link between velamen form and function is still rudimentary.
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spelling Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradientsepiphytic orchidsexodermisinterspecific variationintraspecific variationlignificationplant morphologyvelamen radicumwater relationsABSTRACT Root morphology is expected to respond to environmental conditions. Two earlier studies reported predictable changes in the structure of the velamen radicum (common in monocotyledons) along rainfall gradients, which was expected from its assumed role in plant-water-relations. The present study expanded on this idea by analysing nine root traits that can be linked to root function, including velamen structure, along two moisture gradients of different spatial scales: 1) along the vertical gradient of a lowland forest in central Panama and 2) along a strong regional rainfall gradient in western Panama. All studied traits (e.g. velamen width, number of xylem poles, lignification of the exodermis) of the 45 orchid species showed substantial intraspecific and interspecific variation, but none of this (within forest) or very little of this (regional gradient) was related to the gradients. Only the community weighted means of velamen width, stele width and xylem pole number varied significantly with rainfall, with substantial effect sizes only found in the latter two traits. Our results clearly disagree with those of earlier publications, which did not include species abundance and/or rigorous statistics in their analyses. This discrepancy highlights that our understanding of the link between velamen form and function is still rudimentary.Sociedade Botânica do Brasil2020-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100066Acta Botanica Brasilica v.34 n.1 2020reponame:Acta Botanica Brasilicainstname:Sociedade Botânica do Brasil (SBB)instacron:SBB10.1590/0102-33062019abb0198info:eu-repo/semantics/openAccessEinzmann,Helena J. R.Schickenberg,NinaZotz,Gerhardeng2020-03-16T00:00:00Zoai:scielo:S0102-33062020000100066Revistahttps://www.scielo.br/j/abb/ONGhttps://old.scielo.br/oai/scielo-oai.phpacta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com1677-941X0102-3306opendoar:2020-03-16T00:00Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB)false
dc.title.none.fl_str_mv Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients
title Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients
spellingShingle Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients
Einzmann,Helena J. R.
epiphytic orchids
exodermis
interspecific variation
intraspecific variation
lignification
plant morphology
velamen radicum
water relations
title_short Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients
title_full Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients
title_fullStr Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients
title_full_unstemmed Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients
title_sort Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients
author Einzmann,Helena J. R.
author_facet Einzmann,Helena J. R.
Schickenberg,Nina
Zotz,Gerhard
author_role author
author2 Schickenberg,Nina
Zotz,Gerhard
author2_role author
author
dc.contributor.author.fl_str_mv Einzmann,Helena J. R.
Schickenberg,Nina
Zotz,Gerhard
dc.subject.por.fl_str_mv epiphytic orchids
exodermis
interspecific variation
intraspecific variation
lignification
plant morphology
velamen radicum
water relations
topic epiphytic orchids
exodermis
interspecific variation
intraspecific variation
lignification
plant morphology
velamen radicum
water relations
description ABSTRACT Root morphology is expected to respond to environmental conditions. Two earlier studies reported predictable changes in the structure of the velamen radicum (common in monocotyledons) along rainfall gradients, which was expected from its assumed role in plant-water-relations. The present study expanded on this idea by analysing nine root traits that can be linked to root function, including velamen structure, along two moisture gradients of different spatial scales: 1) along the vertical gradient of a lowland forest in central Panama and 2) along a strong regional rainfall gradient in western Panama. All studied traits (e.g. velamen width, number of xylem poles, lignification of the exodermis) of the 45 orchid species showed substantial intraspecific and interspecific variation, but none of this (within forest) or very little of this (regional gradient) was related to the gradients. Only the community weighted means of velamen width, stele width and xylem pole number varied significantly with rainfall, with substantial effect sizes only found in the latter two traits. Our results clearly disagree with those of earlier publications, which did not include species abundance and/or rigorous statistics in their analyses. This discrepancy highlights that our understanding of the link between velamen form and function is still rudimentary.
publishDate 2020
dc.date.none.fl_str_mv 2020-03-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100066
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100066
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0102-33062019abb0198
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Botânica do Brasil
publisher.none.fl_str_mv Sociedade Botânica do Brasil
dc.source.none.fl_str_mv Acta Botanica Brasilica v.34 n.1 2020
reponame:Acta Botanica Brasilica
instname:Sociedade Botânica do Brasil (SBB)
instacron:SBB
instname_str Sociedade Botânica do Brasil (SBB)
instacron_str SBB
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reponame_str Acta Botanica Brasilica
collection Acta Botanica Brasilica
repository.name.fl_str_mv Acta Botanica Brasilica - Sociedade Botânica do Brasil (SBB)
repository.mail.fl_str_mv acta@botanica.org.br||acta@botanica.org.br|| f.a.r.santos@gmail.com
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