유자의 종류별 수확시기에 따른 유리당, 헤스페리딘, 나린진, 플라보노이드 함량과 항고혈압 활성 변화

Abstract

Yuza (Citrus junos) had 3 varieties and they had variable physiochemical properties. This study analyzed free sugar,hesperidine, naringin, flavonoid contents and antihypertensive activities according to variety and harvest time of Yuza. ThreeYuza varieties, native (C. junos I), improved I (C. junos I + Poncirus trifoliata), improved II (C. junos I + C. junos II) wereused. Harvest time could influence biochemical properties of Yuza such as acidity and °brix. When the Yuza harvested atbehind of season, the sugar/acid ratio went up because the acidity was decreased but sugar content was increased. Fructosecontent was dramatically high at November, Yuza of the season. Total flavonoids was high in pulp parts of improved II andin juice of native one harvested at October. The content of hesperidin and naringin in peels and juices were high in immaturefruits fresh-picked at July since then they were decreased steadily and there were no difference according to varieties. Theangiotensin converting enzyme (ACE) inhibition was powerful at pulp of Yuza in particular native one picked at November.