Chemometric Classification of Different Tree Peony Species Native to China Based on the Assessment of Major Fatty Acids of Seed Oil and Phenotypic Characteristics of the Seeds

详细信息    查看全文

• 作者：Xiao-Xiao Zhang ; Yan-Long Zhang ; Li-Xin Niu ; Jia-Yi Sun ; Lin-Hao Li ; Jing Zhang and Jian Li
• 刊名：Chemistry & Biodiversity
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：14
• 期：1
• 全文大小：817K
• ISSN：1612-1880

文摘

In the present study, we quantitatively measured five major fatty acids (FA) in seed oil using gas chromatography/mass spectrometry (GC/MS) and examined four phenotypic characteristics of the seeds from 19 populations from nine wild tree peony species native to China. The results showed that the unsaturated FAs contents were dominant, of which α-linolenic acid (ALA), linoleic acid, and oleic acid (OA) contents ranged from 14.84 to 42.54 g/100 g, 7.33 to 19.66 g/100 g, and 15.07 – 35.31 g/100 g crude oil, respectively. The phenotypic seed characteristics, such as thousand seed weight (244.01 – 1772.91 g), seed volume (91.31 – 1000.79 mm³), weight rate of kernel and coat (1.29 – 3.62) and oil extraction ratio (20.32 – 34.69%), dramatically varied. Based on the contents of the five FAs, the nine species were classified into two groups. The species belonging to subsection Vaginatae were arranged in cluster I and were characterized by high ALA content. Cluster II, consistent with subsection Delavayanae, had a high OA content. From horizontal and vertical perspectives, the natural distribution areas of these two groups were different, reflecting differences in the FA contents and phenotypic seed characteristics. In conclusion, the FAs composition could be used as a chemotaxonomic marker for tree peony species.