title: Lipid partitioning in maize (Zea mays L.) endosperm highlights relationships among starch lipids, amylose, and vitreousness.
abstract: Content and composition of maize endosperm lipids and their partition in the floury and vitreous regions were determined for a set of inbred lines. Neutral lipids, i.e., triglycerides and free fatty acids, accounted for more than 80% of endosperm lipids and are almost 2 times higher in the floury than in the vitreous regions. The composition of endosperm lipids, including their fatty acid unsaturation levels, as well as their distribution may be related to metabolic specificities of the floury and vitreous regions in carbon and nitrogen storage and to the management of stress responses during endosperm cell development. Remarkably, the highest contents of starch lipids were observed systematically within the vitreous endosperm. These high amounts of starch lipids were mainly due to lysophosphatidylcholine and were tightly linked to the highest amylose content. Consequently, the formation of amylose-lysophosphatidylcholine complexes has to be considered as an outstanding mechanism affecting endosperm vitreousness.
authors: †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France.
authors: Mathieu
authors: M
authors: Gayral
authors: †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France.
authors: Bénédicte
authors: B
authors: Bakan
authors: †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France.
authors: Michele
authors: M
authors: Dalgalarrondo
authors: †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France.
authors: Khalil
authors: K
authors: Elmorjani
authors: ‡Limagrain Europe, Domaine de Mons, 63260 Aubiat, France.
authors: Caroline
authors: C
authors: Delluc
authors: §Limagrain Cereal Ingredients ZAC Les Portes de Riom, Avenue George Gershwin 63200 RIOM Cedex, France.
authors: Sylvie
authors: S
authors: Brunet
authors: §Limagrain Cereal Ingredients ZAC Les Portes de Riom, Avenue George Gershwin 63200 RIOM Cedex, France.
authors: Laurent
authors: L
authors: Linossier
authors: ∥INRA, Agropolymers Engineering and Emerging Technologies, 2 place Pierre Viala, 34060 Montpellier Cedex 02, France.
authors: Marie-Hélène
authors: MH
authors: Morel
authors: †INRA, Biopolymers, Interactions, Assemblies Research Unit, La Géraudière 44316 Nantes Cedex 3, France.
authors: Didier
authors: D
authors: Marion
mesh_terms: D000688:Amylose / Q000032:analysis* / Q000378:metabolism; D002244:Carbon / Q000378:metabolism; D056625:Endosperm / Q000737:chemistry* / Q000378:metabolism; D005227:Fatty Acids / Q000032:analysis / Q000737:chemistry; D005230:Fatty Acids, Nonesterified / Q000032:analysis; D008055:Lipids / Q000032:analysis* / Q000737:chemistry*; D008244:Lysophosphatidylcholines / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D013213:Starch / Q000032:analysis* / Q000737:chemistry; D003313:Zea mays / Q000737:chemistry*
chemical_list: D005227:Fatty Acids; D005230:Fatty Acids, Nonesterified; D008055:Lipids; D008244:Lysophosphatidylcholines; D002244:Carbon; D013213:Starch; D000688:Amylose; D009584:Nitrogen
keywords: endosperm; lipids; maize; vitreousness