You are here: Home
/ Publication Information
Title: The cellular distribution of lignans in Tsuga heterophylla wood
Author: Krahmer, R.l.; Hemingway, Richard W.; Hillis, W.E.;
Source: Wood Science Technology 4:122-139
Publication Series: Miscellaneous Publication
Description: Western hemlock heartwood contains patches of tracheids with large amounts of cellular inclusions. Microscopic and chemical examination of the wood showed several types of deposits containing the lignans matairesinol, hydroxymatairesinol and conidendrin. The deposits, which were often relatively pure individual lignans, frequently assumed different physical forms and chemical composition. A check in the wood contained three distinct forms of deposits each of which was a different lignan. Rays contained deposits physically similar to those in adjacent tracheids but, while lignans were present in the tracheids, they were not detected in the rays. Lignans lined tracheid walls as surface films and often encrusted the bordered pits. The amount of lignans in the wood was not related to wet wood zones although surface films and pit encrustations should have an influence on physical properties. The location and physical nature of lignan deposits in western hemlock heartwood indicates their biosynthesis has probably taken place at the heartwood periphery in the vicinity of the half-bordered pit.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to email@example.com to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
XML: View XML
Krahmer, R.l.; Hemingway, Richard W.; Hillis, W.E. 1970. The cellular distribution of lignans in Tsuga heterophylla wood. Wood Science Technology 4:122-139
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility