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Phytochemical Study and Anti-nutritional Factors in Stems of Dioscorea praehensilis Benth(Dioscoreaceae)

Journal of Botanical Research 2021年第4期3卷 1-10页

作者： Patience Mpia Ngelinkoto andré-marie kassia lokassa Bernadin Bulumuka Jeff Kawaya Maliani Myriam Mukadi Ngondo Ruth Luntadila Mbuli Johnny Bopopi Mukoko Florent Biduaya Mukeba Department of chemistry and environment Faculty of SciencesNational Pedagogic UniversityKinshasaDemocratic Republic of Congo Department of Biology Faculty of SciencesNational Pedagogic UniversityKinshasaDemocratic Republic of Congo Catholic University of the Congo KinshasaDemocratic Republic of Congo

The aim of this research was to find and assay phytochemical compounds and various biological macromolecules of the tender stems of Dioscorea praehensilis benth and evaluate their antioxidant activity and to compare the content of oxalates and cyanogenetic glucosides between raw and cooked tender *** plant collection and identification,phytochemical evaluation:phytochemical screening,preliminary(qualitative)analyses and in vitro *** screening was performed by qualitative *** estimation of the content of secondary metabolites was evaluated by *** activity was evaluated using the ABTS and DPPH assays and preliminary composition by the gravimetric *** results obtained show that the stems of Dioscorea praehensilis are devoid of certain important chemical groups,the flavonoids were not detected and they were rich in total polyphenols(17.22±0.16),tannins(19.32±0.52)and anthocyanins(25.22±0.04).Our extracts showed a lower antioxidant activity than that of positive *** samples are rich in carbohydrates and fiber,with low levels of proteins,lipids and *** praehensilis has a high toxicity in HCN,but after a good cooking of about 1 hour,99.97%of the cyanide are eliminated and does not have many *** results obtained show that Dioscorea praehensilis has a high dietary value and can therefore be used as a nutritive food.

关键词： Oxalate Total cyanide Anti-nutritional factors D.praehensilis Anthocyanes dosage

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