Background: Medicinal plants are an important source of substances which are claimed to induce antimicrobial, antimutagenic and antioxidant
effects. Many plants have been used due to their antimicrobial treatments. Antimicrobial and antioxidant activities of
L. orientalis
have not been
reported to the present day. The aim of this work was to investigate of the antimicrobial and antioxidant potentials of different extracts from
L. orientalis.
Materials and Methods: The extracts were screened for antimicrobial activity against different food pathogens. These bacteria include 4 Gram
positive and 3 Gram negative bacteria and one fungi. The leaf extracts of plant were tested by disc diffusion assay. The MIC was evaluated on
plant extracts as antimicrobial activity. In addition to, the plant extracts were tested against the stable DPPH (2,2-diphenyl-1-picryl-hydrazylhydrate)
free-radical.
Results: The acetone, ethanol and methanol extracts of
L. orientalis showed maximum inhibition zone of 12 mm against
Yersinia enterocolitica
,
Listeria monocytogenes
and
Staphylococcus aureus
. In addition to, the methanol extract displayed a strong antioxidant activity (trolox equivalent
= 2.23 mM).
Conclusion: L. orientalis extracts have antimicrobial, and antioxidant potential. Our results support the use of this plant in traditional medicine
and suggest that some of the plant extracts possess compounds with good antibacterial properties that can be used as antibacterial agents in the
search for new drugs.
