title: 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.
abstract: 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.
authors.affiliation: College of Landscape Architecture and Arts, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, P. R. China.
authors.forename: Xiao-Xiao
authors.initials: XX
authors.lastname: Zhang
authors.affiliation: College of Landscape Architecture and Arts, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, P. R. China.
authors.forename: Yan-Long
authors.initials: YL
authors.lastname: Zhang
authors.affiliation: College of Landscape Architecture and Arts, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, P. R. China.
authors.forename: Li-Xin
authors.initials: LX
authors.lastname: Niu
authors.affiliation: College of Landscape Architecture and Arts, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, P. R. China.
authors.forename: Jia-Yi
authors.initials: JY
authors.lastname: Sun
authors.affiliation: College of Landscape Architecture and Arts, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, P. R. China.
authors.forename: Lin-Hao
authors.initials: LH
authors.lastname: Li
authors.affiliation: College of Horticulture, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, P. R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Forestry, Northwest A&F University, No. 3 Taicheng Road, Yangling, Shaanxi, 712100, P. R. China.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
mesh_terms: D002681:China; D005227:Fatty Acids / Q000032:analysis*; D029596:Paeonia / Q000737:chemistry* / Q000145:classification; D010641:Phenotype; D010938:Plant Oils / Q000737:chemistry; D012639:Seeds / Q000737:chemistry
chemical_list: D005227:Fatty Acids; D010938:Plant Oils
keywords: Chemotaxonomy; Seed oil; Tree peony; Unsaturated fatty acid