Antioxidant and Antibacterial Activities of the Parasitic Plants Orobanche Foetida and Orobanche Crenata Collected on Faba Bean in Tunisia
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Zouhaier Abbes, Moez Amri, Mohamed Kharrat, Nariman El Abed, Sami Ahmed. (1/1/2014). Antioxidant and Antibacterial Activities of the Parasitic Plants Orobanche Foetida and Orobanche Crenata Collected on Faba Bean in Tunisia. Journal of Animal and Plant Sciences, 24, pp. 310-314.
Abstract
The antioxidant activity of the methanolic and aqueous extracts of two parasitic plants Orobanche crenata and
Orobanche foetida collected from faba bean fields was investigated with 2 complementary test systems, DPPH (2,2-
diphenyl-1-picrylhydrazyl) and ABTS (2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid ) radical scavenging
activities. The O. crenata methanol extract showed the highest level of DPPH and ABTS free radical scavenging
activities, with IC50 values of 2.76 µg/ml and 7.96 µg/ml respectively. The amount of total polyphenol and tannins varied
in the different plant extracts and ranged from 3.02 to 19.99 mg GAE/g DW for polyphenol contents and from 0.09 to
0.32 mg EC/g DW for tannins contents. Antimicrobial activity was investigated with the disc diffusion method. The
methanol extract of O. foetida showed activity against all tested bacterial strains, except S. aureus ATCC 6538, by
forming clear inhibition zones with diameters between 12 and 30 mm whereas methanol extracts of O. crenata inhibits
only L. monocytogenes and S. enteredis ATCC 502 with an inhibition zone of 10 and 25 mm respectively. Aqueous
extracts of the two Orobanche species were not active against any of these bacterial isolates. These results implied that
these two Orobanche species collected from infested faba bean fields might be potential resources of antioxidant and
antibacterial activities and can be used in human nutrition and some industrial and pharmaceutical products.
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Amri, Moez https://orcid.org/0000-0002-4707-0618