文献类型：期刊文献

英文题名：Variation in anatomical characteristics and chemical compositions during the sapwood to heartwood transformation of cultivated teak and their relationships to color formation

作者：Feng, Qiming[1,2] Yan, Lirong[1] Huang, Guihua[3] Ren, Suhong[4] Appelt, Joern[5] Radtke, Silke[5] Koch, Gerald[6] Cao, Jinzhen[2] Zhao, Rongjun[1]

第一作者：Feng, Qiming

通信作者：Zhao, RJ[1];Koch, G[2]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Beijing Forestry Univ, Beijing Key Lab Wood Sci & Engn, Beijing 100083, Peoples R China;[3]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China;[4]Zhejiang Agr & Forestry Univ, Coll Chem & Mat Engn, Hangzhou 311300, Peoples R China;[5]Thunen Inst Wood Res, Haidkrugsweg 1, D-22855 Barsbuuttel, Germany;[6]Thunen Inst Wood Res, Leuschner str 91d, D-21031 Hamburg, Germany

年份：2025

卷号：59

期号：2

外文期刊名：WOOD SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20251018012551);Scopus(收录号：2-s2.0-86000022818);WOS:【SCI-EXPANDED(收录号:WOS:001432329800001)】；

基金：This research was funded by the National Natural Science Foundation of China (No. 32171711), and National Extension Project of Forestry and Grassland Scientific and Technological Achievements (2020133113), and supported by a scholarship granted by the China Scholarship Council (CSC, 202203270014).

语种：英文

外文关键词：Biogeochemistry

摘要：The interplay between the anatomical structure, chemical compositions, and color of teak wood is not yet fully understood. An analysis of the anatomical structure and chemical compositions from sapwood to heartwood of cultivated teak (Tectona grandis L.f.) was conducted to elucidate the radial variation in wood color. Extractives were generated within the ray parenchyma cells located in the transition (T) zone, and subsequently infiltrated vessel lumina through the pits in the heartwood, accompanied by the disintegration of the nucleus and the disappearance of starch grains. As heartwood developed, the conjugated carbonyl groups in lignin increased, while the S/G ratio experienced a marked rise within the inner heartwood. The extractive content reached a maximum value in the outer heartwood. Signal intensities for squalene and 2-methyl-9,10-anthracenedione in heartwood were approximately 2.8 and 1.4 times greater than those found in sapwood, respectively. Lapachol only appeared in heartwood. A decrease in the L* value of heartwood was noted in contrast to sapwood, and the color shifted towards red and yellow from sapwood to heartwood. The color difference quantified between sapwood and heartwood was 12.90. The anatomical structure provides the formation and storage spaces, and transportation channels for the extractives. The changes in lignin structure and extractive components are directly linked to the development of wood coloration. Overall, the study contributes to a deep understanding of the relationships between the microstructure, chemical compositions and color formation of teak wood, and will provide insights for the high-value utilization of cultivated precious wood.