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  <titleInfo>
    <title>Relationships among wood anatomy, hydraulic conductivity, density and shear parallel to the grain in the wood of 24-year-old Handroanthus vellosoi (Bignoniaceae)</title>
  </titleInfo>
  <name type="personal">
    <namePart>Longui, Eduardo Luiz</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
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  </name>
  <name type="personal">
    <namePart>Oliveira, Ivanka Rosada de</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Graebner, Ryan Combs</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Freitas, Miguel Luiz Menezes</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Florsheim, Sandra Monteiro Borges</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Garcia, José Nivaldo</namePart>
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      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
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  <abstract>

Abstract

We studied the relationships among wood anatomy, hydraulic conductivity, density and shear parallel to the
grain in the stem of Handroanthus vellosoi trees with the goal to identify possible trade-offs between hydraulic
conductivity and mechanical properties. For this study we felled 12 trees with 24-year-old and cut 10-cm-thick
disks at three heights: base of the trunk, one meter in height, and two meters in height. We propose that the
relationship between hydraulic conductivity and mechanical resistance found along the H. vellosoi trunk indicates
greater mechanical investment in the wood at the base of the trunk compared with the other two heights (1 and
2 meters). Anatomically, this would be represented by smaller diameter vessels and fibers with thicker walls.
Consequently, strength investment implies lower water conductivity at the stem base. However, more studies
are needed to determine whether this lower value with respect to 1 and 2 meters represents a significant effect
on water transport along the stem.

Key words: axial variation, biomechanics,brazilian wood, ipê amarelo, trade-offs.




Resumo

Foram estudadas as relações entre anatomia da madeira, condutividade hidráulica, densidade aparente e
cisalhamento paralelo à grã no tronco de árvores de Handroanthus vellosoi objetivando-se identificar os possíveis
trade-offs entre a condutividade hidráulica e propriedades mecânicas. Para este estudo foram cortadas 12 árvores
com 24 anos de idade, discos com 10 cm de espessura foram retirados em três alturas: base do tronco, um e dois
metros de altura. Propomos que a relação entre a condutividade hidráulica e resistência mecânica encontrados ao
longo do tronco H. vellosoi parece indicar um maior investimento mecânico na base do tronco em comparação
com as outras duas alturas (1 e 2 metros), anatomicamente representada por vasos de menor diâmetro e fibras
com paredes mais espessas. Consequentemente, um investimento em maior resistência mecânica implica em
menor condutividade de água, contudo, mais estudos são necessários para determinar se este valor mais baixo
em relação ao 1 e 2 metros representa um efeito significativo no transporte de água ao longo do tronco.

Palavras-chave: variação axial, biomêcanica, madeira brasileira, ipê amarelo, trade-offs.</abstract>
  <note>Publicação on-line; 37 ref.; 5 illus.; Summaries (En, Pt)</note>
  <subject>
    <topic>MADEIRA</topic>
  </subject>
  <subject>
    <topic>BRASIL</topic>
  </subject>
  <subject>
    <topic>IPÊ AMARELO</topic>
  </subject>
  <relatedItem type="host">
    <titleInfo>
      <title>Rodriguésia (Brazil)</title>
    </titleInfo>
    <originInfo>
      <publisher>Rio de Janeiro-RJ Jardim Botanico do Rio de Janeiro 1935</publisher>
    </originInfo>
    <identifier>2025-3016</identifier>
    <identifier type="issn">0370-6583; 2175-7860 on-line</identifier>
    <identifier type="local">BR2025000987</identifier>
    <part>
      <text>v. 68(4) p. 1217-1224; (2017)</text>
    </part>
  </relatedItem>
  <identifier type="uri">https://www.scielo.br/j/rod/a/f5DdBxhzLRxdZgQJVshMMtH/?format=pdf&amp;lang=en</identifier>
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    <url>https://www.scielo.br/j/rod/a/f5DdBxhzLRxdZgQJVshMMtH/?format=pdf&amp;lang=en</url>
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    <recordCreationDate encoding="marc">250516</recordCreationDate>
    <recordChangeDate encoding="iso8601">20250516123606.0</recordChangeDate>
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      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
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