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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad del Bío Bío
2006
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48580203 |
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Table of Contents:
- Microscopic studies on modified wall structure and lignin topochemistry in xylem fibres of poplar after wounding Claus Frankenstein Uwe Schmitt Agrociencias UV x P poplar Wound reaction fibre cell wall Information about fine structure following wounding in differentiating xylem tissue is still scarce.This study provides information on cell wall modifications with special emphasis on lignin distributionin xylem fibres of poplar differentiating at the time of wounding. Samples were collected from woundedPopulus spp. trees after response periods of up to twenty-three months and processed for microscopicanalyses. General studies on the wall structure of wound-adjacent xylem fibres were carried out withlight and transmission electron microscopy, whereas lignin distribution patterns of these cells wereexamined by UV-microspectrophotometry.Xylem fibres close to the wound and within a transition zone between differentiated xylem laiddown prior to and tissue laid down after wounding developed a distinctively thicker secondary wall thannormal fibres. These modified walls also showed a slightly higher lignin content, than normal and aheterogeneous lignin distribution in the middle lamella and the secondary wall.Wounding in poplar induces a modified wall structure and lignin topochemistry in xylem fibresdifferentiating at the time of wounding. It is assumed that this wound response is part of thecompartmentalization process and therefore contributes to an increased resistance. 2006 artículo científico 0717-3644 https://www.redalyc.org/articulo.oa?id=48580203 en http://www.redalyc.org/revista.oa?id=485 Maderas. Ciencia y Tecnología application/pdf Universidad del Bío Bío Maderas. Ciencia y Tecnología (Chile) Num.2 Vol.8