Research Institute of Forestry New Technology, Chinese Academy of Forestry, Beijing 100091, China; Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China.
Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China.
Fitoterapia. 2020 Apr;142:104493. doi: 10.1016/j.fitote.2020.104493. Epub 2020 Feb 8.
Agarwood is a resinous wood of Aquilaria species and has been used for various applications. Burning agarwood incense is a common practice in temples and homes in Asia. Kynam is widely regarded as high-quality agarwood in the market. Recently, cultivated grafting Kynam (CGK) has emerged as a new agarwood product in the market, which greatly affects the price of high grading Kynam agarwood. In this study, the morphology, ethanol extract content, and incense chemical profile of CGK was investigated and compared with those of wild Kynam (WK) and cultivated common agarwood (CCA). The incense smoke of CGK was analyzed by thermogravimetric Fourier transform infrared spectroscopy (TG-FTIR) and headspace gas chromatography-mass spectrometry (HS-GC-MS). The results showed that the heating of most incenses occurred below 200 °C, and the mass-loss rate value of CGK was between those of WK and CCA. The HS-GC-MS analysis showed the chemical compounds of incense smoke of CGK at 40, 100, and 180 °C, corresponding to the head, middle, and tail of the heating process, respectively. The results suggested that the sesquiterpenes compounds were the major contributors to the mysterious and elegant odoriferous character of agarwood incense. However, a peak area percentage analysis revealed a significant difference in the predominant compounds between CGK and WK, especially at lower temperatures. Therefore, it is not straightforward to substitute WK with CGK. The results are helpful for the study and usage of the new cultivated grafting Kynam agarwood and the development of the agarwood incense industry.
沉香木是沉香属物种的树脂木材，已被用于各种应用。在亚洲的寺庙和家庭中，燃烧沉香木香是一种常见的做法。奇楠（Kynam）被广泛认为是市场上的优质沉香木。最近，种植嫁接奇楠（CGK）已成为市场上的一种新型沉香木产品，这极大地影响了高等级奇楠沉香木的价格。在这项研究中，研究了 CGK 的形态、乙醇提取物含量和熏香化学成分，并将其与野生奇楠（WK）和栽培普通沉香（CCA）进行了比较。通过热重傅里叶变换红外光谱（TG-FTIR）和顶空气相色谱-质谱联用（HS-GC-MS）分析了 CGK 的熏香烟雾。结果表明，大多数熏香在 200°C 以下加热，CGK 的质量损失率值在 WK 和 CCA 之间。HS-GC-MS 分析显示，CGK 熏香烟雾在 40、100 和 180°C 时的化学成分，分别对应于加热过程的头部、中部和尾部。结果表明，倍半萜化合物是沉香木熏香神秘优雅香气的主要贡献者。然而，峰面积百分比分析显示，CGK 和 WK 之间主要化合物存在显著差异，尤其是在较低温度下。因此，用 CGK 替代 WK 并不简单。该结果有助于研究和使用新型种植嫁接奇楠沉香木，并促进沉香熏香产业的发展。
