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University of Gezira (2015)

Phytochemical Analysis and Antimicrobial Activities of Garad (Acacia nilotica L.) and Rumman (Punica granatum L.) Plants

Mohammed, Thowiba Mohammed Eltayeb

Titre : Phytochemical Analysis and Antimicrobial Activities of Garad (Acacia nilotica L.) and Rumman (Punica granatum L.) Plants

Auteur : Mohammed, Thowiba Mohammed Eltayeb

Université de soutenance : University of Gezira

Grade : Doctor of Philosophy in Biosciences and Biotechnology 2015

Résumé
Sudan is rich in medicinal plants which synthesize substances that are useful to the maintenance of health in humans and animals. Garad and Rumman were reported to have some antimicrobial activity. The aim of the present study is to investigate and analyze the phytochemical compounds and the antimicrobial activities of the two plants. The extracts of the different parts of these plants were tested against mycelial growth and spore germination, using selective media and the cup plate Inhibition zone method was used for the solvents tested. The results showed that some parts of the two plants were containing flavonoids, tannins, saponine, sterole and alkaloids. The microbial tests indicated that the Garad seeds extract was highly effective against the radial growth of P. italicum. Leaves and bark extracts were effective against A. niger. Rumman Flower and peel extracts were better against P. italicum. However they were not effective against A. niger. All Rumman part extracts were effective against P. italicum. and only the flower extract was effective against the fresh and dry weights of A. niger. The spore germination tests showed that all the extracts of Garad plant parts were effective against P. italicum. Only the Rumman peels extracts were effective against P. italicum and A. niger. The inhibition zone tests showed that the Garad leaves and pods extracts were highly effective against C. albicans, and bark extract was highly effective against C. valida. The bark and the seeds extracts were effective against C. tropicalis, while, the pods extract was more effective against Pichia sp., E. coli and S. paratyphi. However, the pods, bark and leaves extracts were highly effective against Staphylococcus sp. Rumman peels extracts were more effective against C. tropicalis and all of it’s parts were effective against the three bacteria (E. coli, S. paratyphi and Staphylococcus sp.). The solvent tests showed that the methanolic pod extracts of Garad were effective against the tested fungi, as well as Pichia sp. and C. tropicalis. The leaves extracts were effective against C. albicans, and Staphylococcus sp. , while, the bark extracts were effective against C. tropicalis and C. valida. However, the seeds extracts were effective against C. albicans, C. valida, and C. tropicalis. The methanolic Rumman peels extracts were effective against the two fungi, and C. valida. The ethanolic bark, seeds and pods extracts of Garad were effective against E. coli and S. paratyphi. C. valida was the only sensitive yeast against the bark and the peel ethanolic extracts of Rumman. Peels extracts were more effective against the three tested bacteria. The bark and flower effective against E. coli. All the petroleum ether and hexane extracts of the two plants parts were not effective against all the tested organisms. Both Garad and Rumman plants were containing inhibitory compounds against different microorganisms. It could be suggested that Garad and Rumman extracts could be used for treating some skin diseases.

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