文献类型：期刊文献

英文题名：Synergistic Roles of Biphasic Ethylene and Hydrogen Peroxide in Wound-Induced Vessel Occlusions and Essential Oil Accumulation in Dalbergia odorifera

作者：Cui, Zhiyi[1] Yang, Zengjiang[1] Xu, Daping[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, Guangdong, Peoples R China

年份：2019

卷号：10

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000460731300001)】；

基金：This study was sponsored by the Fundamental Research Funds for the Central Non-profit Research Institution of Chinese Academy of Forestry (Grant No. CAFYBB2017ZX001-4).

语种：英文

外文关键词：mechanical wound; essential oil; ethylene; hydrogen peroxide; heartwood; Dalbergia odorifera

摘要：The heartwood of Dalbergia odorifera (D. odorifera), named "Jiang Xiang" in traditional Chinese medicine, is highly valuable. Mechanical wounding induced the production of "Jiang Xiang" in D. odorifera. Ethylene and hydrogen peroxide (H2O2) are proposed to play vital roles in wound signaling. However, little is known about the role of ethylene or H2O2 in the wound-induced formation of vessel occlusions and biosynthesis of "Jiang Xiang" in D. odorifera. In this study, the pruning of D. odorifera saplings resulted in the synergistic biosynthesis of biphasic ethylene and H2O2, which was followed by formation of vessel occlusions and "Jiang Xiang" in the pruned stems. In this process, the H2O2 production stimulated higher biosynthesis of ethylene. Treatments with aminoethoxyvinylglycine (AVG), an inhibitor for ethylene biosynthesis and ascorbate acid (AsA), a scavenger of H2O2, markedly reduced the production of ethylene and H2O2, respectively, and the corresponding the percentage of vessels with occlusions (PVO), oil content, and the amount of "Jiang Xiang" formed. These results indicate that ethylene and H2O2 might be important wound signals in D. odorifera that induce vessel occlusions and formation of "Jiang Xiang," and thus ethylene and H2O2 might play vital roles in "Jiang Xiang" formation in pruned stems of D. odorifera.