title: Prominent differences in leaf fatty acid composition in the F1 hybrid compared with parent trees Larix gmelinii var. japonica and L. kaempferi.
abstract: Fatty acid (FA) compositions in leaves were investigated for two families of F(1) hybrids of Larix gmelinii var. japonica x L. kaempferi (F(1)) and their parent clones. Twenty-one FAs, from C(12) to C(32), were found in the leaves of both adult trees and seedlings. The levels of 18:1/(18:2 + 18:3) increased in the order L. kaempferi, F(1), and L. gmelinii var. japonica, with significant differences between L. gmelinii var. japonica and F(1) in adult trees, but these differences were not found in the seedlings. Moreover, in the adult trees, the 18:1/(18:2 + 18:3) levels in the neutral phospholipid fraction and the SigmaC(18)/SigmaC(16), especially in the glycolipid fraction, showed significant differences among the three species. These characteristics are discussed from the viewpoint of lipid synthesis in the endoplasmic reticulum and chloroplasts, and of the activities and substrate specificities in sequential FA desaturation. Linear discriminant analysis suggested that the FA compositions are useable as an index in the identification of hybrid seedlings.
authors.affiliation: Hokkaido Forest Products Research Institute, Japan.
authors.forename: Mayumi
authors.initials: M
authors.lastname: Sato
authors.forename: Kazuto
authors.initials: K
authors.lastname: Seki
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Kita
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Moriguchi
authors.forename: Keita
authors.initials: K
authors.lastname: Yunoki
authors.forename: Hisayoshi
authors.initials: H
authors.lastname: Kofujita
authors.forename: Masao
authors.initials: M
authors.lastname: Ohnishi
mesh_terms: D002678:Chimera / Q000378:metabolism; D002736:Chloroplasts / Q000378:metabolism; D016002:Discriminant Analysis; D004721:Endoplasmic Reticulum / Q000378:metabolism; D005227:Fatty Acids / Q000032:analysis*; D006017:Glycolipids / Q000096:biosynthesis / Q000737:chemistry; D028221:Larix / Q000737:chemistry* / Q000166:cytology / Q000378:metabolism; D010743:Phospholipids / Q000096:biosynthesis / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry*; D025341:Principal Component Analysis; D036226:Seedlings / Q000737:chemistry
chemical_list: D005227:Fatty Acids; D006017:Glycolipids; D010743:Phospholipids