Cui Di, Zhu Zichao, Kwon Soon-Wook, Lee Joohyun, Sun Mingmao, Ma Xiaoding, Wang Chutao, Han Bing, Li Xianyong, Han Longzhi
State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Key Laboratory of Grain Crop Genetic Resources Evaluation and Utilization Ministry of Agriculture and Rural Affairs, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Food Chem X. 2025 Aug 8;30:102890. doi: 10.1016/j.fochx.2025.102890. eCollection 2025 Aug.
The global demand for nutrient-rich functional rice is rapidly increasing. However, the metabolic mechanisms underlying the high-nutrient functionality of special rice remain inadequately understood. In this study, we developed 26 novel special rice accessions. Using a widely targeted metabolomics approach, we identified and classified 1347 metabolites. The metabolite profiles of these accessions exhibited substantial differentiation, with 204-629 differentially accumulated metabolites identified. Notably, pigmented giant embryo glutinous (PGEG) rice integrated a diverse array of bioactive compounds and nutrients from pigmented rice and giant embryo glutinous rice. It was particularly enriched in γ-aminobutyric acid (GABA), flavonoids, phenolic acids, alkaloids, and other physiologically active substances. Key metabolic pathways (including the biosynthesis of flavone, flavonol, and flavonoid) were significantly enriched in differential metabolites between white/glutinous and PGEG rice. These findings provide a comprehensive understanding of the metabolite profiles of special rice varieties and offer valuable insights for breeding future high-nutrient functional rice.
全球对营养丰富的功能稻的需求正在迅速增长。然而，特殊水稻高营养功能背后的代谢机制仍未得到充分了解。在本研究中，我们培育了26个新型特殊水稻品种。采用广泛靶向代谢组学方法，我们鉴定并分类了1347种代谢物。这些品种的代谢物谱表现出显著差异，共鉴定出204 - 629种差异积累代谢物。值得注意的是，有色巨胚糯稻整合了来自有色稻和巨胚糯稻的多种生物活性化合物和营养成分。它尤其富含γ-氨基丁酸（GABA）、黄酮类化合物、酚酸、生物碱和其他生理活性物质。白色/糯稻与有色巨胚糯稻之间的差异代谢物中，关键代谢途径（包括黄酮、黄酮醇和类黄酮的生物合成）显著富集。这些发现为特殊水稻品种的代谢物谱提供了全面的认识，并为培育未来的高营养功能稻提供了有价值的见解。
