ON THE CHANGES OF THE EXTRACTIVE COMPOSITION DURING HEARTWOOD FORMATION IN QUEBRACHO-COLORADO (SCHINOPSIS BALANSAE ENGL)

Authors
STREIT W FENGEL D
Citation
W. Streit et D. Fengel, ON THE CHANGES OF THE EXTRACTIVE COMPOSITION DURING HEARTWOOD FORMATION IN QUEBRACHO-COLORADO (SCHINOPSIS BALANSAE ENGL), Holzforschung, 48, 1994, pp. 15-20
Citations number
19
Categorie Soggetti
Forestry,"Materials Science, Paper & Wood
Journal title
Holzforschung → ACNP
ISSN journal
00183830
Volume
48
Year of publication
1994
Supplement
S
Pages
15 - 20
Database
ISI
SICI code
0018-3830(1994)48:<15:OTCOTE>2.0.ZU;2-2
Abstract
The composition of methanol extracts from Quebracho colorado sapwood, heartwood and the sapwood-heartwood boundary was investigated. The con tent of sugars in the extract from sapwood amounted to 40%. Glucose, f ructose and sucrose are the dominating sugars. At the heartwood periph ery carbohydrates are converted into phenolic compounds and the amount of tannins increases sharply. The phenolic extractives from sapwood a nd heartwood differ with regard to composition and structure.