The emissions of volatile organic compounds (VOCs) strongly depend on the plant species and are differently represented in specific taxa. VOCs have a degree of chemical diversity and also can serve as chemotaxonomic markers. Zingiber barbatum Wall. is a wild medicinal ginger plant endemic to Myanmar whose VOC composition has never been screened before. In this study, we screened the rhizome of Z. barbatum to identify the VOC composition by the application of gas chromatography combined with time-of-flight-mass spectrometry (GC-TOF-MS). The resulting VOC profile of Z. barbatum showed that it consists mainly of monoterpenes (21%) and sesquiterpenes (30%). Intraspecific similarities and dissimilarities were found to exist between Z. barbatum genotypes in terms of VOC composition. Four accessions (ZO191, ZO223, ZO217, and the control accession ZO105) collected from the Shan State and Mandalay region of Myanmar were found to share a similar VOC profile, while two accessions (ZO64 and ZO160) collected from the Bago region were found to vary in their VOC profiles compared with the control accession. The two identified compounds, i.e., α-bergamotene and β-(E)-guaiene may serve as discriminative chemical markers for the characterization of Z. barbatum species collected in these three geographical regions of Myanmar. This study represents a first attempt to identify and describe the VOCs in the medicinal species Z. barbatum that have not been reported to date.

中文翻译：

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缅甸野生本土药用生姜（Zingiber barbatum Wall.）中挥发性有机化合物的分析。


挥发性有机化合物（VOC）的排放很大程度上取决于植物种类，并且在特定分类单元中的表现不同。 VOC 具有一定程度的化学多样性，也可以作为化学分类标记。姜墙。是缅甸特有的野生药用生姜植物，其VOC成分此前从未被筛查过。在本研究中，我们采用气相色谱结合飞行时间质谱（GC-TOF-MS）技术筛选了山竹根茎，以鉴定其挥发性有机化合物（VOC）成分。所得到的 Z. barbatum VOC 谱表明它主要由单萜 (21%) 和倍半萜 (30%) 组成。研究发现，在 VOC 组成方面，Z. barbatum 基因型之间存在种内相似性和差异性。从缅甸掸邦和曼德勒地区收集的四种材料（ZO191、ZO223、ZO217 和对照材料 ZO105）被发现具有相似的 VOC 特征，而从勃固地区收集的两种材料（ZO64 和 ZO160）被发现具有相似的 VOC 特征。与对照品相比，它们的 VOC 特征有所不同。两种鉴定出的化合物，即α-香柠檬烯和β-(E)-愈创木烯，可以作为区分性化学标记，用于表征在缅甸这三个地理区域收集的Z. barbatum 物种。这项研究首次尝试鉴定和描述药用物种 Z. barbatum 中的 VOC，但迄今为止尚未有报道。