文献类型：期刊文献

英文题名：Physiological changes during heartwood formation induced by plant growth regulators in Dalbergia odorifera (Leguminosae)

作者：Cui, Zhiyi[1] Li, Xiaofei[1] Xu, Daping[1] Yang, Zengjiang[1] Zhang, Ningnan[1] Liu, Xiaojin[1] Hong, Zhou[1]

第一作者：崔之益

通信作者：Xu, DP[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2021

卷号：42

期号：3

起止页码：217-234

外文期刊名：IAWA JOURNAL

收录：;Scopus(收录号：2-s2.0-85112411191);WOS:【SCI-EXPANDED(收录号:WOS:000683634800001)】；

基金：Z.Y.C. developed the study design and wrote the manuscript. X.F.L., Z.J.Y., N.N.Z., X.J.L. and Z.H. helped conduct data collection and analysis. D.P.X. provided expert knowledge used in the writing and revision of the manuscript. This work was financially supported by the Fundamental Research Funds for the National Key Research and Development Program of China (2016YFD0600601) and the National Natural Science Foundation of China (No. 32001307) . The authors are very grateful to editors and anonymous reviewers for their invaluable suggestion on the manuscript.

语种：英文

外文关键词：non-structural carbohydrates; essential oil; histochemical observation; ethylene; wood anatomy

摘要：There is a need to better understand and promote formation of 'Jiang Xiang', the highly valuable heartwood of Dalbergia odorifera T. Chen. Plant growth regulators are the most widely used and generally most effective promoters of heartwood formation. However, to date no method has been proved effective for D. odorifera as little is known about biochemical and physiological change during heartwood development. Four potential heartwood induction substances viz. ethephon, methyl jasmonate, salicylic acid and abscisic acid solutions were injected into the trunk of D. odorifera to determine the effect on heartwood formation and related physiological responses. Non-structural carbohydrates, wood properties, essential oil and histochemical and structural observation were assessed in the posttreatment period. As also observed in the formation of natural heartwood, growth regulator-induced Jiang Xiang production was accompanied by sapwood dehydration, non-structural carbohydrates consumption and synthesis of heartwood specific substances. These substances were synthesized in the ray and axial parenchyma and than transported into the vessels through the pits. As the heartwood substances accumulated, basic density and essential oil content increased gradually, thereby Jiang Xiang was finally produced. In this process, physiological parameters of discoloured sapwood gradually evolved to resemble those of natural heartwood. Ethephon-induced Jiang Xiang was closest to natural heartwood and its density, essential oil content, composition and relative amounts met the standards for high-quality Jiang Xiang, while the other inducers had unsatisfactory induction effects. This study supports the hypothesis that ethephon could be applied to induce formation of Jiang Xiang in D. odorifera.