2种白木香所产沉香的木材组织构造和化学成分比较

【目的】比较新品种“热科沉香‘1号’”和普通白木香经打钉法结香2年后所产沉香的组织构造和化学成分,为筛选出优良的白木香种质或优树提供参考。【方法】采用木材解剖学方法观测木材三切面,从宏观和微观角度观察2种沉香的木材组织构造;利用气相色谱-质谱联用(GC-MS)方法检测2种沉香的化学成分,并进行对比分析。【结果】1)“热科沉香‘1号’”对创伤的修复能力较弱,结香颜色呈黄褐色,结香体积更大且容易结香,沉香物质主要积累在导管和轴向薄壁组织中;普通白木香对创伤的修复能力较强,结香颜色呈棕褐色,结香体积较小且速度较慢,沉香物质主要积累在内涵韧皮部和木射线薄壁组织中。2) GC-MS分析结果表明,2种白木香所产沉香倍半萜和色酮类成分的总相对百分含量分别为75.88%和70.41%,但“热科沉香‘1号’”所产沉香以色酮类成分为主,普通白木香所产沉香倍半萜和色酮类成分含量相当。3)“奇楠”沉香的标志性成分2-(2-苯乙基)色酮与2-[2-(4-甲氧基)苯乙基]色酮之和在“热科沉香‘1号’”所结沉香中的含量为25.19%,而在普通白木香所结沉香中的含量为5.97%,前者约为后者的4.22倍。【结论】“热科沉香‘1号’”所产沉香的质量更优,是一种易产香、产量高、质量优的种质,值得进一步培育和评价。

Comparison of the Anatomy Structure and Chemical Compositions of Agarwoods from Two Kinds of Aquilaria sinensis

【Objective】 After using nailing method to induce the new variety Aquilaria sinensis ‘Reke 1’ and the common Aquilaria sinensis to produce agarwood for two years, we compared the differences of them.【Method】 Wood anatomical method was used to observe the three sections of wood, wood tissue structure of the two kinds of agarwoods were observed by means of macroscopic and microscopic perspectives. The chemical compositions of two kinds of agarwoods were checked by GC-MS method and a comparative analysis was made.【Result】 1) The new variety agarwood color was yellowish brown, the volume of the former agarwood was bigger than common Aquilaria sinensis and also can produce agarwood easily. The Aquilaria sinensis ‘Reke 1’ has weak ability to repair trauma, its agarwood substance was mainly accumulated in vessel and axial parenchyma. But the common Aquilaria sinensis has strong ability to repair trauma, its agarwood substance was mainly accumulated in ray parenchyma cells and included phloem. 2) GC-MS result indicated that the total relative contents of chromones and sesquiterpenes for Aquilaria sinensis ‘Reke 1’ and common Aquilaria sinensis were 75.88% and 70.41% respectively, the primary constituents of the former agarwood were chromones, and the contents of chromone and sesquiterpene in the latter agarwood were about the same relevant amount. 3) The sum relative contents of compound 2-(2-phenylethyl)chromone and 2-[2-(4-Methoxy)phenylethyl]chromone, which was the ingredient of classy agarwood, were 25.19% and 5.97% respectively in Aquilaria sinensis ‘Reke 1’ and common Aquilaria sinensis. The former is about 4.22 times higher than the later.【Conclusion】 By comprehensive analysis, it illustrate that the quality of agarwood from Aquilaria sinensis ‘Reke 1’ was better than the others, and Aquilaria sinensis ‘Reke 1’was the superiorities of easier to produce agarwood, higher yield of agarwood, better quality of produced agarwood than the common Aquilaria sinensis. It was worthy of further cultivation and evaluation.