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Wood Research and Technology

Holzforschung

Cellulose – Hemicelluloses – Lignin – Wood Extractives

Editor-in-Chief: Faix, Oskar

Editorial Board: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Salmen, Lennart / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Rio, Jose C. / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Koch, Gerald / Lachenal, Dominique / Laine, Christiane / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Potthast, Antje / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Takano, Toshiyuki / Tamminen, Tarja / Theliander, Hans / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi

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1437-434X
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Volume 60, Issue 6

Issues

Topochemical investigation on phenolic deposits in the vessels of afzelia (Afzelia spp.) and merbau (Intsia spp.) heartwood

Gerald Koch
  • Institute for Wood Biology and Wood Protection, Federal Research Centre for Forestry and Forest Products, Hamburg, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Hans-Georg Richter
  • Institute for Wood Biology and Wood Protection, Federal Research Centre for Forestry and Forest Products, Hamburg, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Uwe Schmitt
  • Institute for Wood Biology and Wood Protection, Federal Research Centre for Forestry and Forest Products, Hamburg, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2006-12-04 | DOI: https://doi.org/10.1515/HF.2006.099

Abstract

The topochemical distribution of phenolic deposits in the vessels of afzelia (Afzelia spp.) and merbau (Intsia spp.) heartwood was investigated by means of cellular UV microspectrophotometry (UMSP) to characterise the chemical composition and synthesis by pit membrane-associated enzymes. UV absorbance spectra of the deposits attached to the vessel walls of merbau are characterised by a distinct maximum at a wavelength of 368 nm representing the UV absorbance of pure robinetin (C15H10O7). Deposits in the vessels of afzelia display a typical spectrum of kaempferol (C15H10O2) with two distinct maxima at 270 and 350 nm. The pit membranes and pit canals of associated vessel and parenchyma cells are impregnated by these compounds. These results verify the assumption that the synthesis of deposits in afzelia and merbau is regulated by pit membrane-associated enzymes.

Keywords: afzelia (Afzelia spp.); merbau (Intsia spp.); phenolic deposits; pit membrane; UV microspectrophotometry (UMSP)

About the article

Corresponding author. Institute for Wood Biology and Wood Protection, Federal Research Centre for Forestry and Forest Products, Leuschnerstr. 91, 21031 Hamburg, Germany


Received: December 21, 2005

Accepted: March 3, 2006

Published Online: 2006-12-04

Published in Print: 2006-11-01


Citation Information: Holzforschung, Volume 60, Issue 6, Pages 583–588, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/HF.2006.099.

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Gerald Koch, Eckhard Melcher, Marie-Therese Lenz, and Josef Bauch
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João V.F Latorraca, Oliver Dünisch, and Gerald Koch
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Khin Maung Sint, Stergios Adamopoulos, Gerald Koch, František Hapla, and Holger Militz
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Alexandre Charifo Ali, Ernesto Uetimane, Inácio Arnaldo Lhate, and Nasko Terziev
Wood Science and Technology, 2008, Volume 42, Number 6, Page 453
[12]
Gunthard Scholz, Falk Liebner, Gerald Koch, Claus-Thomas Bues, Björn Günther, and Ernst Bäucker
Wood Science and Technology, 2007, Volume 41, Number 8, Page 673

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