刺柏属和圆柏属分类学的探讨——有关精油成分和花粉形态的分析

为探讨刺柏属、圆柏属的分类地位及相互关系,用气相色谱-质谱-计算机联用仪分析了两属代表种杜松和圆柏、粉柏的精油成分。同时用扫描电镜分析了杜松、圆柏的孢粉形态。结果表明:杜松与圆柏、粉柏在精油成分上有明显差异;杜松与圆柏在孢粉形态上也存在显著不同。两项分析的结果支持了将圆柏属植物从刺柏属中分出另立圆柏属的观点。同时根据3种树的精油分析结果提出了圆柏属在系统演化关系上比刺柏属进化的观点。

An Investigation on Taxonomy of Juniperus and Sabina-Based on Essential Oil and Pollen Morphology Analyses

To ascertain the taxonomic status of Juniperus Linn. and Sabina Mill.,their interrelation, the Chemical components of essential oil in the leavesof Juniperus rigida Sieb. et Zucc., Sabina chinensis (L.) Ant. and Sabinasquamata (Buch-Hamilt. Ant. CV. Meyer) are studied by using acombinationof GC-MS-DS. Pollens from Juniperus rigida Sieb. et Zucc. anb Sabina chinensis (L.)Ant. are also examined by electronic scanning microscope. The result is thatevident differences in essential oil are shown when Sabina chinensis andSabina squamata are compared with Juniperus rigida. There are also differe-nces in pollen marphology shown between Juniperus rigida and Sabina chi-nensis. These results give support to the view that Sabina (Mill.) should beseparated from Juniperus(Linn.) to form a new independent genus. Acco-rding to the result of the essential oil analysis on these three Juniperus,the author also proposes that Sabina(Mill.) is more advanced than Junipe-rus (Linn.) on the evolutionary scale.