University of Khartoum

Assessment of Chemotaxonomic Relationships among some Members of Four Families Recently Grouped in the Brassicales

Assessment of Chemotaxonomic Relationships among some Members of Four Families Recently Grouped in the Brassicales

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Title: Assessment of Chemotaxonomic Relationships among some Members of Four Families Recently Grouped in the Brassicales
Author: Khalid, Mubarak Siddig Hamad
Abstract: This Research aimed to assess the chemotaxonomic relationships among members belonged to four families. Selected species are Morettia philaea, Rorippa indica, Eruca sativa, Schimpera arabica, Maerua crassifolia, Maerua oblongfolia, Capparis decidua, Cleome gynandra and Salvadora persica which were collected, identified and described consulting relevant Floras and publications. Studied species were deposited in the herbaria of the Botany Department –University of Khartoum and Institute of Medicinal and Aromatic Plants – National Center for Research. Some secondary metabolites were qualitatively screened in ethanolic extracts of the different parts of studied species. These metabolites are triterpinoids, steroids, flavonoids, tannins, glycosides, coumarins and saponins. Taxonomic keys were constructed using the qualitative phytochemical screening results. Research also includes phenolic compounds separation using thin layer chromatographic technique and Retention Factors (R.F.) were reported and affinities between different species were calculated. Studied plants were statistically illustrated into three groups based on their affinity. Quantitative analysis of some primary metabolites were also conducted for the species parts, these are carbohydrates, proteins, lipids, tannins, fibers and ash. Data were used to assess the relationships between different species. Average proximate and phytochemical contents values of the studied species were also illustrated in polygonal diagrams. The results revealed the presence of triterpinoids/steroids in the fruits extracts except for S. persica, presence of tannins in the leaves and fruits extract, presence of alkaloids in the roots, stems and leaves extracts of all of the studied species except for S. arabica leaves and E. sativa stem extract. Results indicated the presence of flavonids and glycosides in fruits extracts and saponins in the leaves extracts of all of the studied species and absence of commarins except for C.gynandra fruits. The results of phytochemical screening of phenolic compounds showed that the higher affinity (75%) was recorded between M. oblongifolia and S.arabica on the basis of their roots compounds extract. The Result f Quantitative analysis of the leaves and stems contents showed that M. philaeana, R. indica and M. crassifolia from two different families are clustered in one group , while the analysis of stems and fruits contents showed that C. gynandra, C. decidua and S. arabica from three different families are clustered in one group, Also analysis of leaves contents showed that S. persica is linked to all members of both families Brassicaeae and Capparaceae. This research recommended further chemical investigations in which more species of the Brassicales should be included in order to provide more evidence for their new classification.
URI: http://khartoumspace.uofk.edu/123456789/25000


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