Study of Quantitative Trait Loci (QTLs) Associated with Allelopathic Trait in Rice.

In rice there are few genetic studies reported for allelopathy traits, which signify the ability of plants to inhibit or stimulate growth of other plants in the environment, by exuding chemicals. QTL analysis for allelopathic traits were conducted with 98 F8 RILs developed from the cross between the high allelopathic parents of 'Sathi' and non-allelopathic parents of 'Nong-an'. The performance of allelopathic traits were evaluated with inhibition rate on root length, shoot length, total length, root weight, shoot weight, and total weight of lettuce as a receiver plant.

Potential geo-discriminative tools to trace the origins of the dried slices of shiitake (Lentinula edodes) using stable isotope ratios and OPLS-DA.

The Lentinus edodes species, known as shiitake, has a history of extensive use in many cuisines in several East Asian countries owing to its unique and pleasant flavor and texture. As international food trade increases, reliable discrimination of geographical origin is becoming increasingly crucial in Korea to identify cheaper imported Chinese shiitake. Herein, stable isotope ratios (i.

Compound-specific δC and δN analyses of fatty acids and amino acids for discrimination of organic, pesticide-free, and conventional rice (Oryza sativa L.).

Herein, we improve the procedure for organic rice authentication using compound-specific δC and δN analyses of fatty acids and amino acids, addressing the increasing demand for accurate methods to confirm organic authenticity. Organic rice (OR) and pesticide-free rice (PFR) featured higher values of δN than conventional rice (CR), whereas the corresponding differences between OR and PFR were insignificant. Additionally, OR, PFR, and CR could be discriminated based on some δC and δN values.

Analysis of Selected Phenolic Compounds in Organic, Pesticide-Free, Conventional Rice ( L.) Using LC-ESI-MS/MS.

Rice ( L.) contains generous amounts of carbohydrates, proteins, vitamins, and dietary fibers, in addition to secondary metabolites such as phenols and flavonoids that act as antioxidants. The phenolic compounds detected in rice (organic rice (OR), conventional rice (CR), and pesticide-free rice (PFR)), namely, protocatechuic, gentisic, -hydroxybenzoic, -coumaric, ferulic, salicylic, and caffeic acids, are notable free radical scavengers.

Fatty Acid- and Amino Acid-Specific Isotope Analysis for Accurate Authentication and Traceability in Organic Milk.

The present study describes compound-specific δC and δN analyses of fatty acids and amino acids for improving the accurate authentication of organic milk (OM) against conventional milk (CM) collected in Korea. Most δC and δC values were lower in OM than in CM ( P < 0.05); however, most δN values displayed weak discriminative power for OM authentication.

Changes in Soybean ( L.) Flour Fatty-Acid Content Based on Storage Temperature and Duration.

Soybeans are low in saturated fat and a rich source of protein, dietary fiber, and isoflavone; however, their nutritional shelf life is yet to be established. This study evaluated the change in the stability and quality of fatty acids in raw and roasted soybean flour under different storage temperatures and durations. In both types of soybean flour, the fatty-acid content was the highest in the order of linoleic acid (18-carbon chain with two double bonds; C18:2), oleic acid (C18:1), palmitic acid (C16:0), linolenic acid (18:3), and stearic acid (C18:0), which represented 47%, 26%, 12%, 9%, and 4% of the total fatty-acid content, respectively.

Characterization of New Polyphenolic Glycosidic Constituents and Evaluation of Cytotoxicity on a Macrophage Cell Line and Allelopathic Activities of .

Four new constituents, as 5, 7-dihydroxy-4'-methoxyflavonol-3---d-arabinopyranosyl-(2''→1''')---d-arabinopyrnosyl-2'''--3'''', 7''''-dimethylnonan-1''''-oate (), 5-hydroxy-7, 4'-dimethoxyflavone-5---d-arabinopyranosyl-(2"→1''')---d-arabinopyranosyl-2'''--3'''', 7''''-dimethylnonan-1''''-oate (), 5-hydroxy-7, 4'-dimethoxyflavone-5---d-arabinofuranosyl-(2"→1''')---d-arabinopyranosyl-2'''--lanost-5-ene () and 4',4''-diferuloxy feruloyl---d-arabinopyranosyl-(2a→1b)---d-arabinopyranosyl-(2b→1c)---d-arabinopyranosyl-(2c→1d)---d-arabinopyranosyl-(2d→1e)---d-arabinopyranosyl-2e-3''', 7'''-dimethylnonan-1'''-oate (), along with three known compounds (⁻) were isolated from leaves and straw. The structures of new and known compounds were elucidated by 1D (¹H and C NMR) and 2D NMR spectral methods, : COSY, HMBC, and HSQC aided by mass techniques and IR spectroscopy. The cytotoxicity of these constituents was assessed by using (RAW 264.

Regional discrimination of Agaricus bisporus mushroom using the natural stable isotope ratios.

This study was aimed to verify the regional traceability of Agaricus bisporus mushroom using unique δC, δN, δO, and δS features combined with chemometric approaches. Ten cultivars from 15 mushroom farms in six regions of Korea were measured their isotopic signatures by stable isotope ratio mass spectrometer. The δC, δN, δO, and δS values were significantly different among mushrooms collected from six cultivation regions (P < 0.

Discrimination of organic milk by stable isotope ratio, vitamin E, and fatty acid profiling combined with multivariate analysis: A case study of monthly and seasonal variation in Korea for 2016-2017.

This study examined the monthly and seasonal variations of δC, δN, fatty acids (FAs), and vitamin E in organic milk (OM) and conventional milk (CM) collected in Korea during 2016-2017, discriminating OM authenticity with chemometric approaches. Compared to CM, the mean δC and δN values were lower in OM, whereas the mean α-tocopherol and nutritionally desirable FA contents were higher in OM. Furthermore, δC, δN, and FA contents vary significantly with the season in OM, whereas α-tocopherol does not show a specific seasonal trend in either OM or CM.