文献类型：期刊文献

英文题名：A Comparative Study of the Chemical Compositions of Heartwood and Sapwood in Erythrophleum fordii

作者：Liu, Heng[1,2] Yang, Baoguo[1] Jiang, Zhilin[1] Tang, Jixin[1] Chen, Dongcheng[1] Hao, Jian[1,2] Deng, Xiaoran[1] Li, Lili[1]

第一作者：Liu, Heng;刘衡

通信作者：Hao, J[1];Hao, J[2]

机构：[1]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China;[2]Guangxi Youyiguan Forest Ecosyst Natl Observat & R, Youyiguan Forest Ecosyst Observat & Res Stn Guangx, Pingxiang 532600, Peoples R China

年份：2026

卷号：21

期号：1

起止页码：903-917

外文期刊名：BIORESOURCES

收录：;EI(收录号：20255319813506);Scopus(收录号：2-s2.0-105025907599);WOS:【SCI-EXPANDED(收录号:WOS:001671742800018)】；

基金：This research was supported by the basic scientific research project of Chinese Academy of Forestry (CAFYBB2020MB006), Guangxi Special Program for Science and Technology Bases and Talent (Guike AD19245015)., and the Scientific Program Project of the Experimental Centre of Tropical Forestry, Chinese Academy of Forestry (RLSF-2023-05).We really thank editor and all the reviewers for the valuable comments and suggestions, which is helpful for improving our manuscript greatly.

语种：英文

外文关键词：Erythrophleum fordii; Sapwood; Heartwood; Chemical compositions

摘要：The chemical composition, lignin structure, and extractive profiles of sapwood and heartwood were studied for 18-year-old Erythrophleum fordii trees to elucidate their chemical disparities and potential for highvalue utilization. The cellulose, hemicellulose, and lignin contents were higher in sapwood than in heartwood. In contrast, heartwood exhibited significantly higher ash content, moisture content, and yields of various extractives, along with greater acidity. FTIR spectroscopy revealed SGtype lignin in both sapwood and heartwood, dominated by syringyl units. Heartwood formation did not alter the fundamental lignin structure but increased its condensation degree and reduced the characteristic hemicellulose absorbance. Notably, the heartwood was the primary site for bioactive constituent enrichment, with total phenolic and flavonoid contents (19.9 mg GAE/g DW and 36.5 mg RE/g DW, respectively) 4.3 and 5.6 times higher than those in sapwood. GC-MS analysis further showed that heartwood extractives were rich in terpenoids and sterols (e.g., vitamin E, stigmasterol, and 8-sitosterol), compounds known for their antioxidant, cholesterol-lowering, and pharmaceutical properties. These findings underscore the potential of E. fordii heartwood for developing functional natural products and as a source of pharmaceutical raw materials.