المنشورات و المؤلفات
This study was conducted to evaluate damaging degree of ambient ozone (O3) levels in certain economically important crops in typical areas of the central KSA (Riyadh). Daily mean ozone concentrations were recorded by portable O3 analyzers in the...
Pots study was conducted to determine interactive effects of climate change (NO2, SO2 and O3) on photosynthetic responses in pea. The seeds of pea plants (Pisum sativum L. cv. Little marvel) were grown full-season in three pots arranged at four...
A survey of soils and plant covers was conducted on the coastal plains of the western province of Saudi Arabia to clarify the relationships between the soil properties and the plant cover type. A belt transect of 80 m in length was established...
This study was conducted at four localities (Maseef, Naseem, Oleya and Industrial City) in Riyadh city, KSA to determine the effect of increased tropospheric gases on responses of in situ soil respiration (Rs) of wheat (Triticum aestivum L. cv. Giza...
During 2008, lavender (Lavandula pubescens) seedlings grown in Saudi Arabia were observed with symptoms of dark coloration of the stems with red or brown vascular tissue. The plant wilted and the root system was poorly developed. The fungus Fusarium...
Pollen grain morphology of 6 Plantago species of the family Plantaginaceae collected from Saudi Arabia have been observed under light and scanning electron microscope (SEM). Description of grain sculpture is illustrated by SEM. Plantaginaceae is a...
In November 2008, a wilt of lavender (Lavandula pubescens) seedlings was observed in the greenhouse at King Saud University, Riyadh, Saudi Arabia. Affected seedlings were wilted and the root system was poorly developed. Diseased stems developed a...
This Floristic affinities of the Angiosperm flora of Farasan Archipelago are analyzed. Phytogeographically, it is an interesting area due to its location between a floristically rich North East Africa and the Arabian Peninsula. As per the current...
Pollen grain morphology of 6 Plantago species of the family Plantaginaceae collected from Saudi Arabia have been observed under light and scanning electron microscope (SEM). Description of grain sculpture is illustrated by SEM. Plantaginaceae is a...
A collection of 105 strains of actinomycetes isolated from the soils of Riyadh, Saudi Arabia were evaluated for their ability to inhibit plant pathogenic Fusarium oxysporum, Alternaria alternata, Aspergillus niger, and Aspergillus flavus in vitro...
In the winter of 2009, severe foliar infections were observed on Verbesina encelioides in the greenhouse of the King Saud University at Riyadh (Saudi Arabia). Symptoms appeared as greyish brown patches around the tips and margins of young leaves...
The crude methanol, acetone and water extracts of leaves and pits of three varieties of Phoenix dactylifera were tested for antibacterial action against selected Gram positive and Gram negative pathogenic bacteria. Barring Enterococcus faecalis,...
A total of 20 strains of actinomycetes were isolated from Al-Kharj (K) and Al-Madina (M) areas in Saudi Arabia. Among these strains, six were selected for antiviral activity screening which are K1, K2, K3, M1, M2 and M3. All the selected strains...
Artemisia monosperma were collected from three independent locations in Riyadh during the periods between June 2009 –Feb. 2010 . The goal of this study is to compare the physiological and biochemical strategies during temperature seasonal variation...
Antifungal potential of water, acetone and methanol extracts of leaves and pits of Phoenix dactylifera L. var. Barhee and Rothana were evaluated against seven pathogenic fungi. For assessing the antifungal activity, agar well diffusion and agar...
Actinomycetes were isolated from various desert soil samples of Saudi Arabia using alkaline and normal pH media. A total of 42 akaliphilic actinomycetes isolated from yeast extract-soluble starch (YS agar media (pH 11.0 ± 1) and 102 actinomycetes...
Fusarium oxysporum has a worldwide distribution and is responsible for severe vascular wilt or root rot. Currently, no effective curative treatments to control the fusarium wilt exist. Thus the study was undertaken to find out the antagonistic...
Phoenix dactylifera L. (date palm) is well known for its innumerable health benefits and nutritional values. However, utilization of leaves as a source of element supplement has not been yet explored. Thus, the present study was aimed to employ...
Trichoderma spp. are fungi that are present in substantial numbers in nearly all agricultural soils. They received attention mainly due to their importance in biological control of soil born plant pathogens. They are used in reasonably large...
Fusarium oxysporum has a worldwide distribution and is responsible for severe vascular wilt or root rot. Currently, no effective curative treatments to control the fusarium wilt exist. Thus the study was undertaken to find out the antagonistic...
A post harvest disease of Mangifera india fruit caused by Pestalotiopsis mangiferae, in Saudi Arabia
Mango (Mangifera indica) is one of the most important import fruit of Saudi Arabia. Brown black rots were found as a post harvest disease on the mango fruit. On the basis of the morphological characters, the fungus causing this disease was...
The present study was designed to evaluate the anti-microbial properties of leaf extract from some local plants in Saudi Arabia belonging to seven different families which areRumex vesicarius from the family Polygonaceae, Datura stramonium from the ...
The leaf anatomy and distribution of types of foliar trichome of four Heliotropium L. species have been investigated. The aim of this study is to evaluate the systematic relevance of their diversity compared to the recent findings of systematic...
An in vitro propagation system for Cassia angustifolia Vahl. has been developed. Due to the presence of sennosides, the demand of this plant has increased manyfold in global market. Multiple shoots were induced by culturing nodal explants excised...
The elements present in seeds and leaves of three varieties of Saudi Arabian date palm (Phoenix dactylifera) were analyzed by inductively coupled plasma optical emission spectroscopy (ICP-OES). In general it has been found that all the three...
Anthracnose is a postharvest disease of banana Musa acuminata Colla caused by the fungus Colletotrichum musae Berk & Curtis. The present study was carried out to manage this pathogen in vitro and in vivo using different types of ultraviolet (UV...
Four important plant pathogenic fungi were subjected to evaluate the antifungal potentiality of Citrullus colocynthis. It was recorded that the growth of Fusarium oxysporum, Alternaria alternata, Macrophomina phaseolina and Colletotrichum musae were...
Black scurf is one of the oldest and common diseases of potato stems and stolons below the soil surface caused by Rhizoctonia solani. The present study was carried out to investigate the antifungal potential of Azadirachta indica L. against this...
Black scurf is one of the oldest and common diseases of potato stems and stolons below the soil surface caused by Rhizoctonia solani. The present study was carried out to investigate the antifungal potential of Melia azedarach against this soil-...
Synthetic seed technology is an alternative to traditional micropropagation for production and delivery of cloned plantlets. Synthetic seeds were produced by encapsulating nodal segments of C. angustifolia in calcium alginate gel. 3% (w/v) sodium...
Capparis spinosa L., an important shrub used in traditional as well as modern medicine.
In the present investigation, this plant exposed to water deficit stress and possible changes
in chlorophyll contents, photosynthesis rate, transpiration rate,...
The methanolic extracts of Citrullus colocynthis, Rhazya stricta, Datura stramonium and Zygophyllum coccineum were evaluated for the antimicrobial activity against Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, Staphylococcus aureus...
Synthetic seed technology is an alternative to traditional micropropagation for production and delivery of cloned plantlets. Synthetic seeds were produced by encapsulating nodal segments of C. angustifolia in calcium alginate gel. 3% (w/v) sodium...
Black scurf is one of the oldest and common diseases of potato stems and stolons below the soil surface caused by Rhizoctonia solani. The present study was carried out to investigate the antifungal potential of Melia azedarach against this soil-...
Black scurf is one of the oldest and common diseases of potato stems and stolons below the soil surface caused by Rhizoctonia solani. The present study was carried out to investigate the antifungal potential of Azadirachta indica L. against this...
Abstract — Zygophyllum species are succulent plants that are drought resistant and/or salt tolerant, growing under severe, dry climatic conditions. There is little information concerning molecular variations among species of this genus. Genetic...
The aim of the present study was to examine the influence of photosynthetic pigments composition in Zygophyllum, Tribulus and Fagonia plants in Saudi Arabia. We have selected Zygophyllum, Tribulus and Fagonia genera of Zygophyllacea family were...
The aim of the present study deals with the pollen morphology of Zygophyllum simplex, Zygophyllum migahidii, Tribulus terrestris, Tribulus macropterus, Fagonia glutinosa, Fagonia indica in the species of Saudi Arabia. In this study, we have...
Synthetic seed technology is an alternative to traditional micropropagation for production and delivery of cloned plantlets. Synthetic seeds were produced by encapsulating nodal segments of C. angustifolia in calcium alginate gel. 3% (w/v) sodium...
Many plant species may be used for the production of herbal preparationscontaining phytochemicals with significant anti-oxidant and antiinflammatorycapacities and health benefits. Citrullus Colocynthis spp is among the most known for the medical...
Heliotropium digynum, is a member of Boraginaceae family. The growth of the plant, as well as its size, length of inflorescence and speed of development depends on the amount of rain in their habitat. In this study, we aim to the applicability of...
Teucrium (Lamiaceae) is a large and polymorphic genus distributed mainly in Europe, North Africa and in the temperate parts of Asia. In this study, the anatomical features of the leaf and stem of Teucrium polium are investigated. Teucrium has 19...
Drought stress is one of the major abiotic stresses that are a threat to crop production worldwide. Drought stress impairs the plants growth and yield. Therefore, the aim of the present experiment was to select the tolerant genotype/s on the basis...
An effective and improved plant regeneration system was successfully developed using shoot tip explants taken from a two years old mature plant of Cassia angustifolia. The effect of different cytokinins, [6-benzyladenine (BA), Kinetin (Kin) and...
Rhazya stricta Decne is an important medicinal species used in indigenous medicinal herbal drugs to cure various diseases in South Asia (Pakistan, India and Afghanistan) and in the Middle East (e.g. Saudi Arabia, Qatar, United Arab Emirates (UAE),...
Among different diseases of potatoes, black scurf is the oldest and common disease of stems and stolons, below the soil surface caused by Rhizoctonia solani. The present study was carried out to investigate the antifungal potential of Toona ciliata...
Abstract:
Mentha arvensis is a rich source of menthol that is used in pharmaceutical, flavouring and
cosmetic industries. Environmental conditions including soil type are important factors affecting plant growth and yield. Although mentha is adapted...
Abstract:
The essential oil obtained from fresh leaves of Mentha arvensis (Lamiaceae), a perennial aromatic herb grown in Saudi Arabia, was screened for in vitro antibacterial activity and chemical composition. Hydro-distilled essential oil (yield 0...
An efficient protocol was developed for clonal multiplication of an important shrub: Capparis decidua (Forsk.) Edgew, through in vitro shoot induction and multiplication from nodal explants. Pretreatment of nodal explants in a liquid Murashige and...
Nerium oleander L. belonging to Apocynaceae family was screened for antifungal activity against three economically important fungi Macrophomina phaseolina, Sclerotium rolfsii and Fusarium oxysporum,.Leaves stem and root extracts in aqueous, methanol...