Chalky part differs in chemical composition from translucent part of japonica rice grains as revealed by a notched-belly mutant with white-belly
| Autor: | Xincheng Zhang, Yanfeng Ding, Jinchao Lei, Zhenghui Liu, Deyi Zheng, Ganghua Li, Shaohua Wang, Zunxin Wang, Zhaomiao Lin |
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| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
0301 basic medicine China Phytic Acid Starch Mutant Oryza 01 natural sciences Plant Proteins Dietary Endosperm 03 medical and health sciences chemistry.chemical_compound Botany Dietary Carbohydrates Humans chemical composition Magnesium Amino Acids Chemical composition Research Articles Nutrition and Dietetics biology rice food and beverages minerals biology.organism_classification Japonica rice Trace Elements White (mutation) Horticulture 030104 developmental biology chemistry Mutation Seeds Microscopy Electron Scanning Potassium chalkiness Agronomy and Crop Science Nutritive Value 010606 plant biology & botany Food Science Biotechnology Research Article |
| Zdroj: | Journal of the Science of Food and Agriculture |
| ISSN: | 1097-0010 |
| Popis: | BACKGROUND Chalkiness has a deleterious influence on rice appearance and milling quality. We identified a notched‐belly mutant with a high percentage of white‐belly, and thereby developed a novel comparison system that can minimize the influence of genetic background and growing conditions. Using this mutant, we examined the differences in chemical composition between chalky and translucent endosperm, with the aim of exploring relations between occurrence of chalkiness and accumulation of starch, protein and minerals. RESULTS Comparisons showed a significant effect of chalkiness on chemical components in the endosperm. In general, occurrence of chalkiness resulted in higher total starch concentration and lower concentrations of the majority of the amino acids measured. Chalkiness also had a positive effect on the concentrations of As, Ba, Cd, Cr, Mn, Na, Sr and V, but was negatively correlated with those of B, Ca, Cu, Fe and Ni. By contrast, no significant chalkiness effect on P, phytic acid‐P, K, Mg or Zn was observed. In addition, substantial influence of the embryo on endosperm composition was detected, with the embryo showing a negative effect on total protein, amino acids such as Arg, His, Leu, Lys, Phe and Tyr, and all the 17 minerals measured, excluding Ca, Cu, P and Sr. CONCLUSION An inverse relation between starch and protein as well as amino acids was found with respect to chalkiness occurrence. Phytic acid and its colocalized elements K and Mg were not affected by chalkiness. The embryo exerted a marked influence on chemical components of the endosperm, in particular minerals, suggesting the necessity of examining the role of the embryo in chalkiness formation. © 2016 The Authors. Journal of the Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. |
| Databáze: | OpenAIRE |
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