Comparison of physicochemical characteristics between white-belly and white-core rice grains
文献类型: 外文期刊
作者: Xi, Min 1 ; Zhao, Yanling 1 ; Lin, Zhaomiao 1 ; Zhang, Xincheng 1 ; Ding, Chengqiang 1 ; Tang, She 1 ; Liu, Zhenghui 1 ;
作者机构: 1.Nanjing Agr Univ, Coll Agron, Nanjing 210095, Jiangsu, Peoples R China
2.Anhui Acad Agr Sci, Rice Res Inst, Hefei 230031, Peoples R China
3.Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing 210095, Jiangsu, Peoples R China
关键词: Rice;White-belly grain;White-core grain;Chemical composition
期刊名称:JOURNAL OF CEREAL SCIENCE ( 影响因子:3.616; 五年影响因子:3.891 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Using white-belly and white-core mutants of a japonica rice cultivar Wuyujing3, this study was conducted to compare the physicochemical properties of grains differing in chalkiness type. Chalky grains were larger in length, width, and thickness than the translucent grains, and consequently had higher weight. The notable differences were observed for chemical compositions, with chalky grains showing lower contents of starch and protein than the translucent. Similar trends were noted in the majority of the 17 amino acids examined and contents of manganese (Mn), potassium (K) and magnesium (Mg), suggesting the important role of storage compounds in chalkiness formation. White-belly grains differed from white-core grains in chemical components, with the former having higher amylose contents and lower Zn content. Additionally, white-core grains exhibited markedly lower contents of amino acids derived from oxaloacetate and phosphoenolpyruvate like phenylalanine, aspartate and threonine. However, no noticeable differences were detected between white-belly and translucent grains. Our results indicate different underlying mechanisms of white-belly and white-core, suggesting the necessity of comparing white-belly and white-core in the studies on chalkiness. In addition, future study should focus on interpreting the active role of protein accumulation in chalkiness formation from perspective of interactions of carbon and nitrogen metabolism.
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