The precise determination of the chemical composition in crops is important to identify their nutritional and functional value. The current study performed a systematic delineation of the rice metabolome, an important staple in Asia, to investigate the following: (1) comparative features between brown and white rice; (2) variety-specific composition (Ilpum vs. Odae); and (3) cultivation of region-dependent metabolic content. Global metabolic profiling and data-driven statistics identified the exclusive enrichment of compounds in brown rice compared to white rice. Next, the authors investigated a variety-governed metabolic phenotype among various geo-environmental factors. Odae, the early-ripening cultivar, showed higher contents of most chemicals compared to the late-ripening cultivar, Ilpum. The authors identified regional specificity for cultivation among five areas in Korea which were characterized by polishing degree and cultivar type. Finally, the current study proposes a possible linkage of the region-specific metabolic signatures to soil texture and total rainfall. In addition, we found tryptophan metabolites that implied the potential for microbe-host interactions that may influence crop metabolites.
Bibliographical noteFunding Information:
Funding: This work was supported by the Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) through the Advanced Production Technology Development Program (316081–04). This work was also supported by a grant from the National Research Foundation of Korea (NRF-2019R1A2C1007264) and from the World Institute of Kimchi (KE2001-1) funded by the Ministry of Science, ICT, Republic of Korea. This work was carried out with the support of the “Cooperative Research Program for Agriculture Science and Technology Development (Project No. PJ01589402)” Rural Development Administration, Republic of Korea.
© 2021 by the authors.
- Brown rice
- Cultivation region
- Primary metabolites
- Secondary metabolites
- White rice