Li Ming, Yang Zinong, Hong Zhou, Xu Daping, Li ZhiHui, Wang Shengjie
The Key Laboratory of National Forestry and Grassland Administration for Tropical Forestry Research, Research Institute of Tropical Forestry, Chinese Academy of Forestry, Longdong, Guangzhou, China.
PLoS One. 2025 Jul 3;20(7):e0327514. doi: 10.1371/journal.pone.0327514. eCollection 2025.
Agarwood is the resinous part of the injured tree of the Aquilaria species of the Thymelaeceae family, Qi-Nan is a type of agarwood that forms easily and benefits from a shortened inducing time, noted for features like its substantial resin, (2-phenylethyl) chromone and 2-[2-(4-methoxyphenyl) ethyl] chromone content. Although the content of agarotetrol in Qi-Nan is very low, it is still an important indicator for the agarwood quality. A validated method was developed to precisely quantify both agarotetrol and two aforementioned chromones, as well as ethanal extracts, within Qi-Nan to explore how the inducing time (half a year, one year, and two years) and different clones (YYZ, AS, RH, XGY) affect agarwood quality. Different clones and inducing time both have significant effects on agarwood quality. The agarwood quality of Qi-Nan does not necessarily improve with a longer inducing time. YYZ, AS, and RH clones reached to the best agarwood quality after two years of induction. The ethanol extracts content was among 46.82 ~ 48.59%, two chromones were among 10.57% ~ 14.05% after two years of induction. However, for XGY clone, the quality of agarwood after one year of induction was better than that after two years, which reached to the highest ethanol extracts (51.49%) and two chromones content reached to 12.43% and 12.91% after one year of induction. Therefore, for different clones of Qi-Nan, harvesting should be conducted at different time of induction for agarwood formations, which has theoretical implications for the cultivation and industrial development of cultivated Qi-Nan agarwood.
沉香是瑞香科沉香属树木受伤部位的树脂部分，奇楠是一种易于形成且诱导时间缩短的沉香类型，以其大量树脂、（2-苯乙基）色酮和2-[2-（4-甲氧基苯基）乙基]色酮含量等特征而闻名。虽然奇楠中agarotetrol的含量非常低，但它仍然是沉香质量的一个重要指标。开发了一种经过验证的方法，用于精确量化奇楠中的agarotetrol、上述两种色酮以及乙醛提取物，以探索诱导时间（半年、一年和两年）和不同克隆（YYZ、AS、RH、XGY）如何影响沉香质量。不同的克隆和诱导时间对沉香质量都有显著影响。奇楠的沉香质量不一定随着诱导时间的延长而提高。YYZ、AS和RH克隆在诱导两年后达到最佳沉香质量。诱导两年后，乙醇提取物含量在46.82%至48.59%之间，两种色酮含量在10.57%至14.05%之间。然而，对于XGY克隆，诱导一年后的沉香质量优于诱导两年后的，诱导一年后乙醇提取物含量最高（51.49%），两种色酮含量分别达到12.43%和12.91%。因此，对于奇楠的不同克隆，应在沉香形成的不同诱导时间进行采收，这对人工种植奇楠沉香的栽培和产业发展具有理论意义。
