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  • Suganya, Arunan  (2)
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  • 1
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    Endangered indigenous rice varieties as a source of B vitamins for the undernourished population
    Wiley ; 2023
    In:  Cereal Chemistry Vol. 100, No. 4 ( 2023-07), p. 887-894
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    In: Cereal Chemistry, Wiley, Vol. 100, No. 4 ( 2023-07), p. 887-894
    Abstract: Rice is a staple food for half of the world's population and plays an important role to deliver several micronutrients including B vitamins to humans. The present investigation was carried out to detect some B vitamins and estimate their concentrations in 309 traditional indica rice landraces, compared with three modern rice varieties predominantly available in the Indian market. Findings Liquid chromatographic examination of the rice samples demonstrated that a large number of traditional rice landraces contained considerable amounts of different B vitamins. In the landraces examined, vitamin B1 (thiamine) was recorded to be present in the range of 0.01–10.55 mg/100 g, vitamin B2 (riboflavin) 0.01–2.63 mg/100 g, vitamin B3 (niacin) 0.20–4.52 mg/100 g, vitamin B5 (pantothenic acid) 0.01–18.55 mg/100 g, vitamin B6 (pyridoxine) 0.01–0.86 mg/100 g, and vitamin B7 (biotin) 0.01–5.90 mg/100 g in different rice landraces. Conclusion Compared with traditional rice, modern rice cultivars seem to have substantially lower B vitamin levels. It appears that these vitamin‐rich traditional rice landraces if incorporated into daily diet, may serve to attain nutritional security of the poor. Significance and Novelty Our results show that many traditional rice landraces are nutritionally superior to any modern rice cultivar, even though traditional rice landraces are normally not in priority for agronomic research and development. This study shows how native rice landraces may be leveraged to constitute novel nutritious diet that could enhance human health.
    Type of Medium: Online Resource
    ISSN: 0009-0352 , 1943-3638
    URL: Issue
    URL: Article
    DOI: 10.1002/cche.v100.4
    DOI: 10.1002/cche.10668
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2016053-7
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  • 2
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    Spatial distribution mapping of molecules in the grains of different rice landraces, using desorption electrospray ionization mass spectrometry
    Wiley ; 2019
    In:  Rapid Communications in Mass Spectrometry Vol. 33, No. 7 ( 2019-04-15), p. 727-736
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    In: Rapid Communications in Mass Spectrometry, Wiley, Vol. 33, No. 7 ( 2019-04-15), p. 727-736
    Abstract: Documentation of the metabolite profiles of rice landraces is essential as most of them have been lost due to the conventional practices of cultivation. Therefore, application of mass spectrometry imaging (MSI) will be an appropriate analytical platform for molecular profiling, as it can provide a detailed understanding of the site‐specific localization patterns of biomolecules, and the cues concerning metabolic pathways in organisms. Methods Desorption electrospray ionization mass spectrometry (DESI‐MS) is a relatively non‐destructive analytical technique for surface sampling in natural conditions. Here, we report the spatial distribution of diverse molecules in the grains of different rice landraces of India using DESI‐MSI. Molecules were identified by ESI‐MS and tandem MS analysis of rice extracts. Scanning electron microscopy (SEM) and energy‐dispersive X‐ray spectroscopy (EDS) were used for the elemental mapping on the rice grains. Results DESI‐MSI showed a uniform distribution of choline ( m/z 104.1), sucrose in the form of its sodium ( m/z 365.1) and potassium ( m/z 381.0) adducts, linoleic acid ( m/z 279.2), 13‐HODE‐9‐HODE ( m/z 295.2), unidentified molecules with m/z 535.3, 559.5, and 561.5 and isoschaftoside ( m/z 563.1) in the endosperm of rice grains. Gluconic acid ( m/z 195.0) and signalling phospholipid intermediate molecules were localized in the embryo whereas oryzanol A ( m/z 601.5) and oryzanol C ( m/z 615.5) had a restricted localization in the bran region of the grain. SEM‐EDS mapping showed the localization of potassium and phosphorus along the bran and embryo. Conclusions DESI‐MSI revealed the distribution of lipids and sugar molecules in the specific regions of the rice grains. Thus, molecules unique to some rice varieties were identified with this analytical platform. Mass spectrometry imaging of rice along with the elemental mapping by SEM‐EDS will be of use in understanding the localization pattern of certain molecules in the context of metals present in the grain.
    Type of Medium: Online Resource
    ISSN: 0951-4198 , 1097-0231
    URL: Issue
    URL: Article
    DOI: 10.1002/rcm.v33.7
    DOI: 10.1002/rcm.8397
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2002158-6
    detail.hit.zdb_id: 58731-X
    SSG: 11
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