title: Fatty acid profile in the seeds and seed tissues of Paeonia L. species as new oil plant resources.
abstract: Most common plant oils have little α-linolenic acid (C18:3(Δ9,12,15), ALA) and an unhealthy ω6/ω3 ratio. Here, fatty acids (FAs) in the seeds of 11 species of Paeonia L., including 10 tree peony and one herbaceous species, were explored using gas chromatograph-mass spectrometer. Results indicated that all Paeonia had a ω6/ω3 ratio less than 1.0, and high amounts of ALA (26.7-50%), oleic acid (C18:1(Δ9), OA) (20.8-46%) and linoleic acid (C18:2(Δ9,12), LA) (10-38%). ALA was a dominant component in oils of seven subsection Vaginatae species, whereas OA was predominant in two subsection Delavayanae species. LA was a subdominant oil component in P. ostii and P. obovata. Moreover, the FA composition and distribution of embryo (22 FAs), endosperm (14 FAs) and seed coat (6 FAs) in P. ostii, P. rockii and P. ludlowii were first reported. Peony species, particularly P. decomposita and P. rockii, can be excellent plant resources for edible oil because they provide abundant ALA to balance the ω6/ω3 ratio. The differences in the ALA, LA and OA content proportion also make the peony species a good system for detailed investigation of FA biosynthesis pathway and ALA accumulation.
authors.affiliation: Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai Chenshan Botanical Garden, Shanghai 201602, China.
authors.forename: Shuiyan
authors.initials: S
authors.lastname: Yu
authors.affiliation: East China Normal University, Shanghai 200241, China.
authors.forename: Shaobo
authors.initials: S
authors.lastname: Du
authors.affiliation: Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai Chenshan Botanical Garden, Shanghai 201602, China.
authors.forename: Junhui
authors.initials: J
authors.lastname: Yuan
authors.affiliation: Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai Chenshan Botanical Garden, Shanghai 201602, China.|East China Normal University, Shanghai 200241, China.
authors.forename: Yonghong
authors.initials: Y
authors.lastname: Hu
mesh_terms: D005227:Fatty Acids / Q000145:classification / Q000378:metabolism; D008401:Gas Chromatography-Mass Spectrometry; D019787:Linoleic Acid / Q000302:isolation & purification / Q000378:metabolism*; D050356:Lipid Metabolism; D019301:Oleic Acid / Q000302:isolation & purification / Q000378:metabolism*; D029596:Paeonia / Q000737:chemistry / Q000378:metabolism*; D010938:Plant Oils / Q000737:chemistry; D012639:Seeds / Q000737:chemistry / Q000378:metabolism*; D017962:alpha-Linolenic Acid / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D005227:Fatty Acids; D010938:Plant Oils; D017962:alpha-Linolenic Acid; D019301:Oleic Acid; D019787:Linoleic Acid