Academic Journal
Soil salinity modulates fatty acid composition and antioxidant capacity of rice bran oil.
| Τίτλος: | Soil salinity modulates fatty acid composition and antioxidant capacity of rice bran oil. |
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| Συγγραφείς: | Manasathien J; Program of Biology, Faculty of Science and Technology, Nakhon Ratchasima Rajabhat University, Nakhon Ratchasima, Thailand., Laojinda W; Faculty of Science, Mahasarakham University, Maha Sarakham, Thailand., Attarataya J; Beamline Division, Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand., Khanema P; Department of Biology, Faculty of Science, Mahasarakham University, Maha Sarakham, Thailand.; Isan Saline Soil Research Unit (ISSRU), Faculty of Science, Mahasarakham University, Maha Sarakham, Thailand. |
| Πηγή: | PeerJ [PeerJ] 2026 Jul 02; Vol. 14, pp. e21476. Date of Electronic Publication: 2026 Jul 02 (Print Publication: 2026). |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: PeerJ Inc Country of Publication: United States NLM ID: 101603425 Publication Model: eCollection Cited Medium: Internet ISSN: 2167-8359 (Electronic) Linking ISSN: 21678359 NLM ISO Abbreviation: PeerJ Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: Corte Madera, CA : PeerJ Inc. |
| Ιατρικοί όροι (MeSH): | Antioxidants*/analysis , Antioxidants*/chemistry , Fatty Acids*/analysis , Fatty Acids*/chemistry , Soil*/chemistry , Rice Bran Oil*/chemistry , Salinity*, Oryza/chemistry ; Phenylpropionates/analysis ; Fatty Acids, Unsaturated/analysis ; Thailand ; Spectroscopy, Fourier Transform Infrared |
| Περίληψη: | Background: Rice bran oil (RBO) is valued for its nutritional and functional properties; however, the influence of soil salinity on RBO quality under field conditions remains insufficiently understood. This study examined RBO derived from two major Thai rice varieties, glutinous RD6 and non-glutinous KDML105, cultivated across saline-affected sites along the Siao Yai River in northeastern Thailand. Methods: Soil chemical properties, including electrical conductivity of the saturated paste extract (EC Results: Soil salinity was strongly associated with variations in RBO compositional quality. Significant salinity effects were observed for specific saturated fatty acids, particularly stearic (C18:0) and arachidic acids (C20:0), which decreased under high-salinity conditions, and linoleic acid (C18:2n6c), which increased under high salinity. In addition, total polyunsaturated fatty acids (ΣPUFA) and fatty acid ratios, including monounsaturated fatty acids/saturated fatty acids (MUFA/SFA), polyunsaturated fatty acids/saturated fatty acids (PUFA/SFA), and unsaturated fatty acids/saturated fatty acids (UFA/SFA) were significantly higher under saline conditions, indicating a shift toward a relatively more unsaturated lipid profile. Antioxidant activity increased significantly with salinity and was positively associated with salinity indicators and unsaturated fatty acids, while carotenoid content was also higher under saline conditions and γ-oryzanol showed a variety-dependent response to salinity. In contrast, RBO yield was not affected by salinity, suggesting a potential decoupling between oil quantity and compositional quality, although this relationship warrants further controlled investigation. Calcium concentration in RBO increased under high salinity, suggesting a soil-oil linkage, whereas other elements showed limited responses. SR-FTIR analysis revealed comparable triacylglycerol spectral features across all samples, indicating that salinity-related differences were quantitative rather than structural. Conclusion: These findings suggest that saline soil environments may enhance key nutritional and functional attributes of RBO without compromising oil yield, highlighting opportunities for valorizing RBO produced in saline-prone agricultural regions. (©2026 Manasathien et al.) |
| Competing Interests: | Jakrada Attarataya is an employee of the Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand. The remaining authors declare that they have no competing interests. |
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| Contributed Indexing: | Keywords: Antioxidant activity; Fatty acid composition; Field-based study; Multivariate analysis; Rice bran oil; Rice cultivars; Soil salinity; Unsaturated fatty acids; γ-oryzanol |
| Molecular Sequence: | figshare 10.6084/m9.figshare.31082683.v4 |
| Substance Nomenclature: | 0 (Antioxidants) 0 (Fatty Acids) 0 (Soil) LZO6K1506A (Rice Bran Oil) SST9XCL51M (gamma-oryzanol) 0 (Phenylpropionates) 0 (Fatty Acids, Unsaturated) |
| Entry Date(s): | Date Created: 20260706 Date Completed: 20260706 Latest Revision: 20260813 |
| Update Code: | 20260814 |
| PubMed Central ID: | PMC13333127 |
| DOI: | 10.7717/peerj.21476 |
| PMID: | 42405261 |
| Βάση Δεδομένων: | MEDLINE |
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