Khalaf Ali Fayez Abuamra

استاذ - أستاذ متفرغ

كلية العلوم

العنوان: قسم النبات والميكروبيولوجى -كلية العلوم -جامعة سوهاج



Research Area

Plant Physiology and Toxicology


2018-10-24 12:33:18 | الكلمات المفتاحية salt stress, ;water stress, Oxidative stress, Antioxidant activity,
Improving drought and salinity tolerance in barley by application of salicylic acid and potassium nitrate
Growth and physiological activities of barley (_Hordeum vulgare_ L. cv. Gustoe) grown in soil cultures were evaluated to recognize the ameliorative role of salicylic acid (SA) and KNO3 against the negative effects of salt and water deficit stresses. Barley plants were subjected to three levels of NaCl (50, 100 and 150 mM), three levels of water stress (80%, 70% and ... إقراء المزيد

2018-10-25 11:57:32 | الكلمات المفتاحية Plectranthus tenuiflorus;, antimicrobial substances;, endophytic bacteria;, extracellular enzymes,
Isolation and characterization of endophytic bacteria from Plectranthus tenuiflorus medicinal plant in Saudi Arabia desert and their antimicrobial activities
The diversity and beneficial characteristics of endophytic microorganisms have been studied in _Plectranthus tenuiflorus_ medicinal plant. However, information regarding naturally occurring _P. tenuiflorus_ plant associated endophytes among different organs of host is limited. Endophytic bacteria were isolated from root, stem, and leaves of _P. tenuiflorus_ plant. Among 28 endophytic bacterial isolates from different organs of _P. tenuiflorus_ plant, 8 isolates ... إقراء المزيد

2018-10-26 08:39:24 | الكلمات المفتاحية Pigments; Ultrastructure, Fig leaf mottle-associated, Pigments; Ultrastru, Ficus carica, ANTIOXIDANT,
Detection and partial characterization of a putative closterovirus affecting Ficus carica: molecular, ultrastructural and physiological aspects of infected leaves
_Fig mosaic disease_ (FMD) was systemically transmitted to susceptible fig plants by grafting and led to development of symptoms including a wide array of discoloration, green blisters, mottling, crinkling and deformation of leaves and fruits. A sensitive assay for the detection of FMV using specific enzyme-linked immune sorbent assay and reverse transcription-polymerase chain reaction was developed. A double-stranded RNA ca. ... إقراء المزيد

2018-10-24 21:32:49 | الكلمات المفتاحية Antioxidant capacity,
Modifications of antioxidant activity and protein composition of bean leaf due to Bean yellow mosaic virus infection and salicylic acid treatments
The antioxidant status as well as protein composition of faba bean leaves infected with _Bean yellow mosaic virus_ (BYMV) and the effect of salicylic acid application was examined in this paper. Some modifications in the antioxidant status were observed by changing some antioxidant enzymes activities and contents of antioxidant metabolites. BYMV-infected leaves revealed POD, CAT, APX and SOD induced activities ... إقراء المزيد

2018-10-24 21:03:22 | الكلمات المفتاحية Bean yellow mosaic, Salicylic acid; Ultrastructure, Photosynthesis, Faba bean,
Protective action of salicylic acid against bean yellow mosaic virus infection in Vicia faba leaves
In this study, morphological, ultrastructural and physiological modifications of faba bean (_Vicia faba_ cv Giza 461) leaves in response to bean yellow mosaic virus (BYMV) infection and salicylic acid (SA) treatments were examined. Under BYMV stress, leaves showed symptoms including severe mosaic, mottling, crinkling, size reduction and deformations. Three weeks after virus inoculation, photosynthetic rate, pigment contents and transpiration rate ... إقراء المزيد