PJB-2018-119
PHYLOGENETIC RELATIONSHIPS AND TAXONOMY OF SOME SPECIES OF AMARANTHACEAE BASED ON MORPHOLOGICAL TRAITS AND ANTIMICROBIAL EFFECTS AGAINST SOME ISOLATED PATHOGENIC BACTERIA
AHMED El-SHABASY
Abstract
The present study illustrated the phylogenetic relationships and taxonomy among some species of Amaranthaceae using morphological traits besides antimicrobial effects of their solvent extracts. Amaranthus hybridus and Amaranthus viridis were recorded as closely species while Aerva javanica and Amaranthus viridis were distantly related species. Plant extracts were done using chloroform. Two pathogenic bacteria were identified as Klebsiella pneumoniae and Staphylococcus pasteuri. Using the disk diffusion assay, Staphylococcus pasteuri and Klebsiella pneumoniae demonstrated a multiple resistance against 37% and 64% of the tested antibiotics respectively. Amaranthaceae species; Aerva javanica, Aerva lanata, Amaranthus graecizans ssp. silvestris, Amaranthus hybridus, Amaranthus viridis and Digera muricata extracts were tested as antimicrobial agents against three pathogenic bacteria (Brevibacterium lines, Staphylococcus pasteuri and Klebsiella pneumonia). The current results showed that the most susceptible organism was Klebsiella pneumoniae which was sensitive to all extracts. The growth of Staphylococcus pasteuri was inhibited at lower dose (1.5mg/well) using Amaranthus viridis and Digera muricata extracts. Meanwhile it had begun inhibition at 3mg/well against the others extracts and reached to the maximum inhibition at 6 mg/well using Amaranthus viridis.The lowest growth of Brevibacterium linens inhibition was at 1.5 mg/well using Amaranthus viridis,Digera muricata, Aerva javanica and Amaranthus hybridus. However the lower inhibition using both of Amaranthus graecizans and Aerva lanata was at extract concentration 3mg/well and gave the highest inhibition with Digera muricata at 6 mg/well. From these results, it was proved that some species of Amaranthaceae have antimicrobial effect against some pathogenic bacteria. Keywords: Amaranthaceae , Brevibacterium lines, Staphylococcus pasteuri and Klebsiella pneumonia, antimicrobial activity.
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