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Anatomical features associated with water transport in imperforate tracheary elements of vessel-bearing angiosperms

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Anatomical features associated with water transport in imperforate tracheary elements of vessel-bearing angiosperms

Auteurs : Yuzou Sano [Japon] ; Hugh Morris [Royaume-Uni] ; Hiroshi Shimada [Japon] ; Louis P. Ronse De Craene [Royaume-Uni] ; Steven Jansen [Royaume-Uni]

Source :

Annals of Botany [ 0305-7364 ] ; 2011.

RBID : PMC:3080625

Abstract

Background and Aims

Imperforate tracheary elements (ITEs) in wood of vessel-bearing angiosperms may or may not transport water. Despite the significance of hydraulic transport for defining ITE types, the combination of cell structure with water transport visualization in planta has received little attention. This study provides a quantitative analysis of structural features associated with the conductive vs. non-conductive nature of ITEs.

Methods

Visualization of water transport was studied in 15 angiosperm species by dye injection and cryo-scanning electron microscopy. Structural features of ITEs were examined using light and electron microscopy.

Key Results

ITEs connected to each other by pit pairs with complete pit membranes contributed to water transport, while cells showing pit membranes with perforations up to 2 µm were hydraulically not functional. A close relationship was found between pit diameter and pit density, with both characters significantly higher in conductive than in non-conductive cells. In species with both conductive and non-conductive ITEs, a larger diameter was characteristic of the conductive cells. Water transport showed no apparent relationship with the length of ITEs and vessel grouping.

Conclusions

The structure and density of pits between ITEs represent the main anatomical characters determining water transport. The pit membrane structure of ITEs provides a reliable, but practically challenging, criterion to determine their conductive status. It is suggested that the term tracheids should strictly be used for conductive ITEs, while fibre-tracheids and libriform fibres are non-conductive.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3080625

DOI: 10.1093/aob/mcr042
PubMed: 21385773
PubMed Central: 3080625

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<author><name sortKey="Sano, Yuzou" sort="Sano, Yuzou" uniqKey="Sano Y" first="Yuzou" last="Sano">Yuzou Sano</name>
<affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan</addr-line>
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<country xml:lang="fr">Japon</country>
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<front><div type="abstract" xml:lang="en"><sec><title>Background and Aims</title>
<p>Imperforate tracheary elements (ITEs) in wood of vessel-bearing angiosperms may or may not transport water. Despite the significance of hydraulic transport for defining ITE types, the combination of cell structure with water transport visualization <italic>in planta</italic>
 has received little attention. This study provides a quantitative analysis of structural features associated with the conductive vs. non-conductive nature of ITEs.</p>
</sec>
<sec><title>Methods</title>
<p>Visualization of water transport was studied in 15 angiosperm species by dye injection and cryo-scanning electron microscopy. Structural features of ITEs were examined using light and electron microscopy.</p>
</sec>
<sec><title>Key Results</title>
<p>ITEs connected to each other by pit pairs with complete pit membranes contributed to water transport, while cells showing pit membranes with perforations up to 2 µm were hydraulically not functional. A close relationship was found between pit diameter and pit density, with both characters significantly higher in conductive than in non-conductive cells. In species with both conductive and non-conductive ITEs, a larger diameter was characteristic of the conductive cells. Water transport showed no apparent relationship with the length of ITEs and vessel grouping.</p>
</sec>
<sec><title>Conclusions</title>
<p>The structure and density of pits between ITEs represent the main anatomical characters determining water transport. The pit membrane structure of ITEs provides a reliable, but practically challenging, criterion to determine their conductive status. It is suggested that the term tracheids should strictly be used for conductive ITEs, while fibre-tracheids and libriform fibres are non-conductive.</p>
</sec>
</div>
</front>
</TEI>
<pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
  <front><journal-meta><journal-id journal-id-type="nlm-ta">Ann Bot</journal-id>
<journal-id journal-id-type="publisher-id">annbot</journal-id>
<journal-id journal-id-type="hwp">annbot</journal-id>
<journal-title-group><journal-title>Annals of Botany</journal-title>
</journal-title-group>
<issn pub-type="ppub">0305-7364</issn>
<issn pub-type="epub">1095-8290</issn>
<publisher><publisher-name>Oxford University Press</publisher-name>
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<article-meta><article-id pub-id-type="pmid">21385773</article-id>
<article-id pub-id-type="pmc">3080625</article-id>
<article-id pub-id-type="doi">10.1093/aob/mcr042</article-id>
<article-id pub-id-type="publisher-id">mcr042</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Orginal Articles</subject>
</subj-group>
</article-categories>
<title-group><article-title>Anatomical features associated with water transport in imperforate tracheary elements of vessel-bearing angiosperms</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Sano</surname>
<given-names>Yuzou</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
<xref ref-type="corresp" rid="cor1">*</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Morris</surname>
<given-names>Hugh</given-names>
</name>
<xref ref-type="aff" rid="af2">2</xref>
<xref ref-type="author-notes" rid="FN1">†</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Shimada</surname>
<given-names>Hiroshi</given-names>
</name>
<xref ref-type="aff" rid="af1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Ronse De Craene</surname>
<given-names>Louis P.</given-names>
</name>
<xref ref-type="aff" rid="af3">3</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Jansen</surname>
<given-names>Steven</given-names>
</name>
<xref ref-type="aff" rid="af2">2</xref>
<xref ref-type="author-notes" rid="FN2">‡</xref>
</contrib>
</contrib-group>
<aff id="af1"><label>1</label>
<addr-line>Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan</addr-line>
</aff>
<aff id="af2"><label>2</label>
<addr-line>Jodrell Laboratory, Royal Botanic Gardens Kew, Richmond, Surrey TW9 3DS, UK</addr-line>
</aff>
<aff id="af3"><label>3</label>
<addr-line>Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh EH3 5LR, Scotland, UK</addr-line>
</aff>
<author-notes><fn fn-type="con" id="FN1"><label>†</label>
<p>Present address: The Forestry and Arboriculture Department, Plumpton College, Ditchling Road, Plumpton, NR Lewes, East Sussex BN7 3AE, UK</p>
</fn>
<fn fn-type="con" id="FN2"><label>‡</label>
<p>Present address: Institute of Systematic Botany and Ecology, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany</p>
</fn>
<corresp id="cor1"><label>*</label>
For correspondence. E-mail <email>pirika@for.agr.hokudai.ac.jp</email>
</corresp>
</author-notes>
<pub-date pub-type="ppub"><month>5</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub"><day>8</day>
<month>3</month>
<year>2011</year>
</pub-date>
<volume>107</volume>
<issue>6</issue>
<fpage>953</fpage>
<lpage>964</lpage>
<history><date date-type="received"><day>22</day>
<month>10</month>
<year>2010</year>
</date>
<date date-type="rev-recd"><day>29</day>
<month>11</month>
<year>2010</year>
</date>
<date date-type="accepted"><day>26</day>
<month>1</month>
<year>2011</year>
</date>
</history>
<permissions><copyright-statement>© The Author 2011. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For Permissions, please email: journals.permissions@oup.com</copyright-statement>
<copyright-year>2011</copyright-year>
</permissions>
<self-uri content-type="pdf" xlink:type="simple" xlink:href="mcr042.pdf"></self-uri>
<abstract><sec><title>Background and Aims</title>
<p>Imperforate tracheary elements (ITEs) in wood of vessel-bearing angiosperms may or may not transport water. Despite the significance of hydraulic transport for defining ITE types, the combination of cell structure with water transport visualization <italic>in planta</italic>
 has received little attention. This study provides a quantitative analysis of structural features associated with the conductive vs. non-conductive nature of ITEs.</p>
</sec>
<sec><title>Methods</title>
<p>Visualization of water transport was studied in 15 angiosperm species by dye injection and cryo-scanning electron microscopy. Structural features of ITEs were examined using light and electron microscopy.</p>
</sec>
<sec><title>Key Results</title>
<p>ITEs connected to each other by pit pairs with complete pit membranes contributed to water transport, while cells showing pit membranes with perforations up to 2 µm were hydraulically not functional. A close relationship was found between pit diameter and pit density, with both characters significantly higher in conductive than in non-conductive cells. In species with both conductive and non-conductive ITEs, a larger diameter was characteristic of the conductive cells. Water transport showed no apparent relationship with the length of ITEs and vessel grouping.</p>
</sec>
<sec><title>Conclusions</title>
<p>The structure and density of pits between ITEs represent the main anatomical characters determining water transport. The pit membrane structure of ITEs provides a reliable, but practically challenging, criterion to determine their conductive status. It is suggested that the term tracheids should strictly be used for conductive ITEs, while fibre-tracheids and libriform fibres are non-conductive.</p>
</sec>
</abstract>
<kwd-group><kwd>Cryo-SEM</kwd>
<kwd>dye injection</kwd>
<kwd>fibre-tracheid</kwd>
<kwd>libriform fibre</kwd>
<kwd>pit membrane</kwd>
<kwd>pit morphology</kwd>
<kwd>secondary xylem</kwd>
<kwd>imperforate tracheary element (ITE)</kwd>
<kwd>tracheid</kwd>
<kwd>vessel</kwd>
<kwd>water transport</kwd>
</kwd-group>
</article-meta>
</front>
</pmc>
</record>

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Anatomical features associated with water transport in imperforate tracheary elements of vessel-bearing angiosperms

Anatomical features associated with water transport in imperforate tracheary elements of vessel-bearing angiosperms

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Abstract

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