The Occurrence and Role of Allantoin (5-ureidohydantoin) in Rice Grains

作     者：WANG Peng 1,SUN Bei 1,KONG Chui-Hua ,2 ,XU Xiao-Hua 3 1 State Key Laboratory of Forest and Soil Ecology,Institute of applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China 2 College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,China 3 State Key Laboratory of Elemento-organic Chemistry,Nankai University,Tianjin 300071,China 

会议名称：《中国第五届植物化感作用学术研讨会》

会议日期：2011年

学科分类：09[农学] 0901[农学-作物学] 

摘      要：Allantoin (5-ureidohydantoin) was found in grains of 15 Chinese rice *** profiles in these rice grains differed significantly among cultivars and *** always had the highest allantoin content,followed by brown rice and milled *** contained the lowest allantoin *** Japonica bran contained allantoin at high contents of over 120 μg/g,while indica bran rarely exceed 100 μg/*** was a positive relationship between grain allantoin levels and seedlings survival in paddy ***,exogenous allantoin increased soluble sugar and free praline contents,and decreased malondialdehyde (MDA) content in rice ***,allantoin did not show any antioxidant activity in a concentration-dependent manner through the free-radical scavenging capacity,reducing power,linoleic acid peroxidation inhibition and chelating *** results suggest that allantoin in rice grains may play a role in participating rice seeds resistant to low temperature stress rather than serving as a source of dietary bio-functional phytochemical.