title: Relationship between muscle antioxidant status, forms of iron, polyunsaturated fatty acids and functionality (retail colour) of meat in lambs.
abstract: The relationship between muscle vitamin E, forms of iron, polyunsaturated fatty acids (PUFA) and the redness of meat (retail display) at days 3 to 4 post slaughter from lambs offered 2 different diets was examined. Meat redness was positively related to vitamin E and heme iron and negatively related to total n-3, total n-6 and total PUFA content. However, after adjusting for the effects of vitamin E and heme iron content, there was no indication of any residual relationship between redness at days 3-4 of retail display and total n-3, total n-6 or total PUFA. This indicates that the relationship between PUFA and redness in meat is mediated through the effects of heme iron and vitamin E in the muscle. It appears that the level of highly oxidisable PUFAs in muscle tissues do not play a major role in maintenance of redness at days 3-4 of retail display, but the level of vitamin E and heme iron content are important.
authors.affiliation: CRC for Sheep Industry Innovation, Homestead Building, UNE, Armidale, NSW 2350, Australia. eric.ponnampalam@dpi.vic.gov.au
authors.forename: Eric N
authors.initials: EN
authors.lastname: Ponnampalam
authors.forename: Kym L
authors.initials: KL
authors.lastname: Butler
authors.forename: Matthew B
authors.initials: MB
authors.lastname: McDonagh
authors.forename: Joe L
authors.initials: JL
authors.lastname: Jacobs
authors.forename: David L
authors.initials: DL
authors.lastname: Hopkins
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry*; D003116:Color; D004032:Diet; D015525:Fatty Acids, Omega-3 / Q000032:analysis* / Q000378:metabolism; D043371:Fatty Acids, Omega-6 / Q000032:analysis* / Q000378:metabolism; D019266:Iron, Dietary / Q000032:analysis* / Q000378:metabolism; D016014:Linear Models; D008460:Meat / Q000032:analysis*; D009132:Muscles / Q000737:chemistry*; D010084:Oxidation-Reduction; D034561:Sheep, Domestic; D014810:Vitamin E / Q000032:analysis / Q000378:metabolism
chemical_list: D000975:Antioxidants; D015525:Fatty Acids, Omega-3; D043371:Fatty Acids, Omega-6; D019266:Iron, Dietary; D014810:Vitamin E