title: Comparative carotenoid compositions during maturation and their antioxidative capacities of three citrus varieties.
abstract: This study investigated total carotenoid content, comparative carotenoid composition, vitamin C content, and total antioxidant capacity of three citrus varieties which are Yuza (Citrus junos Sieb ex Tabaka), Kjool (Citrus unshiu Marcow), and Dangyooja (Citrus grandis Osbeck). Seven carotenoids were identified, with β-cryptoxanthin, astaxanthin, and zeaxanthin being predominant in citrus varieties. Ripening increased the total carotenoid in three citrus varieties. Individual carotenoid of canthaxanthin, astaxanthin, and α-carotene in citrus varieties decreased with maturation, whereas the others increased with ripening. Yuza exhibited the highest total antioxidant capacity in 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulfonic acid (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assays, with VCEAC values of 582.9 mg/100 g and 451.5 mg/100g, respectively. The relative VCEAC values were vitamin C (1.00)>lycopene (0.375), α-carotene (0.304), β-carotene (0.289), β-cryptoxanthin (0.242), and zeaxanthin (0.099). These results indicate that Yuza contains higher amounts of total carotenoids, individual carotenoids, and vitamin C than other Korean citrus varieties.
authors.affiliation: Department of Food and Nutrition, SoongEui Women's College, Seoul 100-751, Republic of Korea.
authors.forename: Kyung-Mi
authors.initials: KM
authors.lastname: Yoo
authors.affiliation: Department of Food and Nutrition, Chung-Ang University, Gyeonggi-do 456-756, Republic of Korea. Electronic address: bkmoon@cau.ac.kr.
authors.forename: BoKyung
authors.initials: B
authors.lastname: Moon
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D001205:Ascorbic Acid / Q000032:analysis; D002338:Carotenoids / Q000032:analysis*; D002957:Citrus / Q000737:chemistry* / Q000254:growth & development
chemical_list: D000975:Antioxidants; D002338:Carotenoids; D001205:Ascorbic Acid
keywords: Antioxidant capacity; Carotenoids; Citrus; Lycopene; β-Cryptoxanthin