Topochemical studies on modified lignin distribution in the xylem of Poplar (Populus spp.) after wounding.
Identifieur interne : 003F09 ( Main/Corpus ); précédent : 003F08; suivant : 003F10Topochemical studies on modified lignin distribution in the xylem of Poplar (Populus spp.) after wounding.
Auteurs : C. Frankenstein ; U. Schmitt ; G. KochSource :
- Annals of botany [ 0305-7364 ] ; 2006.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Lignin.
- anatomy & histology : Populus.
- chemistry : Cell Wall, Populus.
- ultrastructure : Populus.
- Cell Differentiation, Imaging, Three-Dimensional, Microscopy, Electron, Transmission, Microspectrophotometry, Ultraviolet Rays.
Abstract
BACKGROUND AND AIMS
Information on the influence of wounding on lignin synthesis and distribution in differentiating xylem tissue is still scarce. The present paper provides information on cell modifications with regard to wall ultrastructure and lignin distribution on cellular and subcellular levels in poplar after wounding.
METHODS
Xylem of Populus spp. close to a wound was collected and processed for light microscopy, transmission electron microscopy and cellular UV microspectrophotometry. Cell wall modification with respect to lignin distribution was examined at different stages of wound tissue development. Scanning UV microspectrophotometry and point measurements were used to determine the lignin distribution.
KEY RESULTS
Xylem fibres within a transition zone between differentiated xylem laid down prior to wounding and the tissues formed after wounding developed distinctively thickened secondary cell walls. Those modified walls and cell corners showed, on average, a higher lignin content and an inhomogeneous lignin distribution within the individual wall layers.
CONCLUSIONS
The work presented shows that wounding of the xylem may induce a modified wall architecture and lignin distribution in tissues differentiating at the time of wounding. An increasing lignin content and distinctively thickened walls can contribute to improved resistance as part of the compartmentalization process.
DOI: 10.1093/aob/mcj030
PubMed: 16354725
PubMed Central: PMC2803368
Links to Exploration step
pubmed:16354725Le document en format XML
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<author><name sortKey="Frankenstein, C" sort="Frankenstein, C" uniqKey="Frankenstein C" first="C" last="Frankenstein">C. Frankenstein</name>
<affiliation><nlm:affiliation>University of Hamburg, Department of Wood Science, Division Wood Biology, Hamburg, Germany. c.frankenstein@holz.uni-hamburg.de</nlm:affiliation>
</affiliation>
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<author><name sortKey="Schmitt, U" sort="Schmitt, U" uniqKey="Schmitt U" first="U" last="Schmitt">U. Schmitt</name>
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<author><name sortKey="Koch, G" sort="Koch, G" uniqKey="Koch G" first="G" last="Koch">G. Koch</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Topochemical studies on modified lignin distribution in the xylem of Poplar (Populus spp.) after wounding.</title>
<author><name sortKey="Frankenstein, C" sort="Frankenstein, C" uniqKey="Frankenstein C" first="C" last="Frankenstein">C. Frankenstein</name>
<affiliation><nlm:affiliation>University of Hamburg, Department of Wood Science, Division Wood Biology, Hamburg, Germany. c.frankenstein@holz.uni-hamburg.de</nlm:affiliation>
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<author><name sortKey="Schmitt, U" sort="Schmitt, U" uniqKey="Schmitt U" first="U" last="Schmitt">U. Schmitt</name>
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<author><name sortKey="Koch, G" sort="Koch, G" uniqKey="Koch G" first="G" last="Koch">G. Koch</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cell Differentiation (MeSH)</term>
<term>Cell Wall (chemistry)</term>
<term>Imaging, Three-Dimensional (MeSH)</term>
<term>Lignin (analysis)</term>
<term>Microscopy, Electron, Transmission (MeSH)</term>
<term>Microspectrophotometry (MeSH)</term>
<term>Populus (anatomy & histology)</term>
<term>Populus (chemistry)</term>
<term>Populus (ultrastructure)</term>
<term>Ultraviolet Rays (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Lignin</term>
</keywords>
<keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Populus</term>
</keywords>
<keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Cell Wall</term>
<term>Populus</term>
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<keywords scheme="MESH" qualifier="ultrastructure" xml:lang="en"><term>Populus</term>
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<keywords scheme="MESH" xml:lang="en"><term>Cell Differentiation</term>
<term>Imaging, Three-Dimensional</term>
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<front><div type="abstract" xml:lang="en"><p><b>BACKGROUND AND AIMS</b>
</p>
<p>Information on the influence of wounding on lignin synthesis and distribution in differentiating xylem tissue is still scarce. The present paper provides information on cell modifications with regard to wall ultrastructure and lignin distribution on cellular and subcellular levels in poplar after wounding.</p>
</div>
<div type="abstract" xml:lang="en"><p><b>METHODS</b>
</p>
<p>Xylem of Populus spp. close to a wound was collected and processed for light microscopy, transmission electron microscopy and cellular UV microspectrophotometry. Cell wall modification with respect to lignin distribution was examined at different stages of wound tissue development. Scanning UV microspectrophotometry and point measurements were used to determine the lignin distribution.</p>
</div>
<div type="abstract" xml:lang="en"><p><b>KEY RESULTS</b>
</p>
<p>Xylem fibres within a transition zone between differentiated xylem laid down prior to wounding and the tissues formed after wounding developed distinctively thickened secondary cell walls. Those modified walls and cell corners showed, on average, a higher lignin content and an inhomogeneous lignin distribution within the individual wall layers.</p>
</div>
<div type="abstract" xml:lang="en"><p><b>CONCLUSIONS</b>
</p>
<p>The work presented shows that wounding of the xylem may induce a modified wall architecture and lignin distribution in tissues differentiating at the time of wounding. An increasing lignin content and distinctively thickened walls can contribute to improved resistance as part of the compartmentalization process.</p>
</div>
</front>
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<Abstract><AbstractText Label="BACKGROUND AND AIMS" NlmCategory="OBJECTIVE">Information on the influence of wounding on lignin synthesis and distribution in differentiating xylem tissue is still scarce. The present paper provides information on cell modifications with regard to wall ultrastructure and lignin distribution on cellular and subcellular levels in poplar after wounding.</AbstractText>
<AbstractText Label="METHODS" NlmCategory="METHODS">Xylem of Populus spp. close to a wound was collected and processed for light microscopy, transmission electron microscopy and cellular UV microspectrophotometry. Cell wall modification with respect to lignin distribution was examined at different stages of wound tissue development. Scanning UV microspectrophotometry and point measurements were used to determine the lignin distribution.</AbstractText>
<AbstractText Label="KEY RESULTS" NlmCategory="RESULTS">Xylem fibres within a transition zone between differentiated xylem laid down prior to wounding and the tissues formed after wounding developed distinctively thickened secondary cell walls. Those modified walls and cell corners showed, on average, a higher lignin content and an inhomogeneous lignin distribution within the individual wall layers.</AbstractText>
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