Comparative Metabolic Analysis of Different Indica Rice Varieties Associated with Seed Storability

文献类型： 外文期刊

第一作者： Wu, Fangxi

作者： Wu, Fangxi;Wei, Yidong;Zhu, Yongsheng;Luo, Xi;He, Wei;Wang, Yingheng;Cai, Qiuhua;Xie, Huaan;Zhang, Jianfu;Wu, Fangxi;Xie, Guosheng

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关键词： rice (Oryza sativa L.); seed storability; metabolome; metabolism pathway

期刊名称：METABOLITES （ 影响因子：3.7； 五年影响因子：4.1 ）

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年卷期： 2025 年 15 卷 1 期

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收录情况： SCI

摘要： Seed storability is a crucial agronomic trait and indispensable for the safe storage of rice seeds and grains. Nevertheless, the metabolite mechanisms governing Indica rice seed storability under natural conditions are still poorly understood. Methods: Therefore, the seed storage tolerance of global rice core germplasms stored for two years under natural aging conditions were identified, and two extreme groups with different seed storabilities from the Indica rice group were analyzed using the UPLC-MS/MS metabolomic strategy. Results: Our results proved that the different rice core accessions showed significant variability in storage tolerance, and the metabolite analysis of the two Indica rice pools exhibited different levels of storability. A total of 103 differentially accumulated metabolites (DAMs) between the two pools were obtained, of which 38 were up-regulated and 65 were down-regulated, respectively. Further analysis disclosed that the aging-resistant rice accessions had higher accumulation levels of flavonoids, terpenoids, phenolic acids, organic acids, lignans, and coumarins while exhibiting lower levels of lipids and alkaloids compared to the storage-sensitive rice accessions. The Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis indicated that several biosynthesis pathways were involved in the observed metabolite differences, including alpha-linolenic acid metabolism, butanoate metabolism, and propanoate metabolism. Notably, inhibition of the linolenic acid metabolic pathway could enhance seed storability. Additionally, increased accumulations of organic acids, such as succinic acid, D-malic acid, and methylmalonic acid, in the butanoate and propanoate metabolisms were identified as a beneficial factor for seed storage. Conclusions: These new findings will deepen our understanding of the underlying mechanisms governing rice storability.

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