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|Title||Study of Floristic Diversity and Screening of Medicinal Plants for Antimicrobial Activity in Al- Salqa Valley Area, Gaza strip, Palestine|
The research was carried out to study the floristic diversity, the life forms, phytogeographical analysis, screening the ethnomedicinal plants of the investigated flora and assessment of some medicinal plants antimicrobial activates against some microorganisms in Al-salqa valley area, Gaza strip, Palestine . The study area has a characteristically semi-arid climate, and is located in a transitional zone between Mediterranean, Negev and Sinai. Plant species richness and habitat diversity is a high in our study area in comparison with anther locations in the Mediterranean region. In our study 145 plant species were recorded along Al-salqa valley area .They belong to 112 genera and 40 families. Survey of plants grown in the area of study was conducted during the period January to August /2011, 2012. The most abundant families were Asteraceae (21species 14.5%), Poaceae (16 species 11%), Fabaceae (13 species 6.9%), Solanaceae (8 species 5.5%), Chenopodiaceae (7species 4.8%) , Geraniaceae (6 species 4.1%)). The high percent of surveyed plants on the study area were annuals 72.2% , comparing with another life from phanerophytes, chamaephytes, hemicryptophyte, cryptophytes, 12.5 %, 6.20 % , 5.51 %, 3.4 %, respectively. The surveyed locations extend along Al-salqa valley and the vegetation were sampled at Buttom, Bank and Open Field. The locations comprise seven quadrates were chosen in the area to study plant communities. Some ecological parameters such as: species richness, cover-abundance scale and frequency were studied. Based on results of our study, unique vegetation diversity in our study area may be resulting from the effect of various factors such as sewage water, soil moisture, soil salinity, urban effects, bordering agricultural fields, and solid waste which create a great variety of ecological condition for plants. Phytogeographical analysis of the study area showed that 93 species (66.4% of the total recorded species ) are Mediterranean, 48 Irano – Turanian (34.2%) ,22 Saharo-Arabian (15.7%)and 23 Euro –Siberean (16.4%). The survey of referent literature study showed that a total of 75 medicinal plant species, among the total flora of the area, were used for different purposes as follows: 21 used for treating digestive system and liver disease, 17 species for treating genitourinary system, skin disease 17 species, antimicrobial and antioxidant activity 14 species, 12 for treating circulatory system and heart, 5 for anticancer, 10 for nervous system, 6 for treating hair diseases, 9 for inflammation and fever, 7 for treating rheumatism, 6 for treating diabetic disease, 4 for treating teeth pain and 12 for treating other diseases. The most important families for medicinal plants were Asteraceae(10species), Euphorbiaceae (5species), Solanaceae (6species), Brassicaceae (4species), Fabaceae(5species). The antimicrobial activity of five plant extracts was evaluated with antibiotic susceptible and resistant microorganisms. In addition, synergistic effects when associated with antibiotics were studied. Extracts from the following plants were utilized: Atreplix sembiccata (Chenopodiaceae), Echium angustifolium( Boraginaceae), Solanum nigrum (Solanaceae), Solanum elaeagnifolium (Solanaceae) and Fumaria caprolata (Fumaraceae). Association of antibiotics and plant extracts showed synergistic antibacterial activity against antibiotic-resistant bacteria. The results obtained with Pseudomonas aeruginosa , Staphylococcus aureus and Escherichia coli.
|Publisher||الجامعة الإسلامية - غزة|
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