Journal of Food, Agriculture and Environment

Antimicrobial activity of various extracts from some plants native to Alqassim Region, Saudi Arabia


Ali M. Aldoweriej, Khaled B. Alharbi*, Elhassan M.A. Saeed, Ibrahim M. El-Ashmawy

Recieved Date: 2015-11-02, Accepted Date: 2015-12-20


Crude extracts of 21 plant species were screened for their antimicrobial activity. Described standard methods were used to prepare plant extracts and to determine their phytoconstituents (PCs). The antimicrobial activity was determined using agar disc diffusion and broth dilution methods. Microorganisms tested were ATCC strains: Pseudomonas aeruginosaKlebsiella pneumoniaeEscherichia coliStaphylococcus aureusCandida albicans and Aspergillus brasiliensis. Commercial antibiotic discs were used as references. The PCs detected were phenolics and flavonoids, followed by saponins. Most active plants against bacteria were Artemisia herba-albaRhanterium epapposum and Achillea fragrantissima, while against A. brasiliensis was Deverra triradiata and against C. albicans were Moltkiopsis ciliataD. triradiata and Echinops spinosus; minimum inhibitory concentration range was 0.153 – 0.937 mg/ml and zones of growth inhibition 7 – 22 mm (100 µg/disc). Diameters of all inhibition zones were less than those of reference antibiotics, except for methanolic extract of D. triradiata against A. brasiliensis, which performed better than nystatin. The presence of PCs was found moderately correlated with antimicrobial performance. These findings provide justification for searching antimicrobials in these plants, especially in D. triradiata against fungi.


Alqassim region, antimicrobial activity, phytoconstituents, plant extracts, Saudi Arabia

Journal: Journal of Food, Agriculture and Environment
Year: 2016
Volume: 14
Issue: 1
Category: Food and Health
Pages: 14-19

Full text for Subscribers

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

Purchase this Article:   20 Purchase PDF Order Reprints for 15

Share this article :