sabry.mahmoud

sabry.mahmoud

استاذ - أستاذ ورئيس قسم الميكروبيولوجى

كلية الزراعة

العنوان: 105 شارع الهلالى - شقه 215- برج عمر بن الخطاب - أسيوط - مصر

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أضيف حديثا
  • المقررات الدراسية 10
  • ملحقات المقررات الدراسية 3
  • واجبات المقررات الدراسية 1
  • المنشورات و المؤلفات 31
  • ساعات مكتبية 0
  • الاعلانات 0
  • عدد الملفات المرفوعه 3
  • كل التنزيلات 5

Protective action of salicylic acid against bean yellow mosaic virus infection in Vicia faba leaves

2008 | الكلمات المفتاحية Bean yellow mosaic virus, Faba bean, Photosynthesis, salicylic acid, ultrastructure,
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

Physiological and metabolic changes of Cucurbita pepo leaves in response to zucchini yellow mosaic virus (ZYMV) infection and salicylic acid treatments

2007 | الكلمات المفتاحية Metabolism Peroxidase Pigments,
Physiological and metabolic changes of Cucurbita pepo leaves in response to zucchini yellow mosaic virus (ZYMV) infection and salicylic acid treatments
The changes of some physiological and biochemical parameters in pumpkin (_Cucurbita pepo_ cv Eskandarani) leaves associated with zucchini yellow mosaic virus (ZYMV) infection and the effect of exogenous application of salicylic acid (SA) were studied in this paper. In comparison to the untreated leaves, ZYMV infected leaves showed many symptoms, including severe mosaic, size reduction, stunting and deformation. Results from ... إقراء المزيد

Systemic acquired resistance induced in cucumber plants against powdery mildew disease by pre-inoculation with tobacco necrosis virus

2007 | الكلمات المفتاحية Powdery mildew, cucumber, Tobacco necrosis virus, systemic acquired resistance,
Systemic acquired resistance induced in cucumber plants against powdery mildew disease by pre-inoculation with tobacco necrosis virus
Systemic Acquired Resistance (SAR) in cucumber plants against powdery mildew disease, caused by Sphaerotheca fuliginea (Schlechtend Fr.) Pollacci, was induced by localized infection in cucumber cotyledons with Tobacco Necrosis Virus (TNV). Inoculation of the two cotyledon leaves significantly reduced powdery mildew severity on cucumber true leaves similar to the effect of fungicide. TNV-local lesions developed plants still protected against powdery ... إقراء المزيد

Tobacco callus culture as a propagating medium for Cucumber mosaic cucumovirus

2007 | الكلمات المفتاحية
Tobacco callus culture as a propagating medium for Cucumber mosaic cucumovirus
This study was performed on Cucumber mosaic _cucumovirus_ (CMV) as a model. The virus was isolated from naturally infected cucumber plants depending on polyclonal antibodies specific for the CMV (subgroup I) and local lesions produced on _Chenopodium amaranticolor_ were used as a source of single lesion isolation. CMV isolate was maintained in _Nicotiana tabacum_ cv. White Burley. The presence of ... إقراء المزيد

Identification of onion yellow dwarf Potyvirus as one of the major viruses infecting garlic in Egypt

2007 | الكلمات المفتاحية
Identification of onion yellow dwarf Potyvirus as one of the major viruses infecting garlic in Egypt
Onion Yellow Dwarf _Potyvirus_ (OYDV) causes mosaic in garlicplants, together with other _potyviruses_, _Carlaviruses_ and _Alexiviruses_. A garlic isolate of OYDV (OYDV-G) presenting typical yellow strips was isolated from naturally garlic mixed infected plants and then biologically purified by single local lesion method on leaves of _Chinopodium amaranticolor_ plants. The obtained isolated was mechanically transmitted and caused chlorotic local lesions ... إقراء المزيد

Mucilage and protein constituents of certain medicinal plants growing in Egypt and their antiphytoviral activity

2006 | الكلمات المفتاحية Tomato mosaic tobamovirus, mucilages, proximate composition, drug plants,
Mucilage and protein constituents of certain medicinal plants growing in Egypt and their antiphytoviral activity
The crude protein of Lotus glinoides, Forsskalea tenacissima and Suaeda vermiculata were found to be 13.53%, 15.74% and 14.32% respectively. The analysis of the amino acids isolated from L. glinoides using the amino acid analyzer revealed the presence of 15 amino acids, in which alanine (9.11%), glutamic acid (8.13%) and proline (8.94%) represented the major components. The analysis of amino ... إقراء المزيد

Salicylic acid alleviates growth inhibition and oxidative stress caused by zucchini yellow mosaic virus infection in Cucurbita pepo leaves

2006 | الكلمات المفتاحية Gas exchange, Antioxidant enzyme activity, Zucchini yellow mosaic virus, salicylic acid, Pumpkin, Pigments, Photosynthesis rate, Leaf growth,
Salicylic acid alleviates growth inhibition and oxidative stress caused by zucchini yellow mosaic virus infection in Cucurbita pepo leaves
The effects of zucchini yellow mosaic virus (ZYMV) infection and pretreatments with salicylic acid (SA) on biomass accumulation of pumpkin (_Cucurbita pepo_ cv. Eskandarani) were investigated. The response of photosynthesis, transpiration and the activities of antioxidant enzymes in leaves was also considered. Significant reductions in growth parameters (i.e. leaf area, biomass and shoot height), photosynthesis and chlorophyll _a_ and _b_ ... إقراء المزيد

Physiological and Histopathological Changes in Potato Virus X and Potato virus Y-Infected Potato Plants

2004 | الكلمات المفتاحية
Physiological and Histopathological Changes in Potato Virus X and Potato virus Y-Infected Potato Plants
Potato viruses X and Y were used for study the effect of the two viruses on the metabolism of potato plants. It was found that detectable decrease of dry matter, total nitrogen, tuber starch, number of starch granules and total protein. The nucleic acid content of infected plants increased than healthy ones. The investigated hydrolytic enzymes of amylase and protease ... إقراء المزيد

Spread and occurrence of sugar beet rhizomania caused by beet necrotic yellow vein Benyvirus in some Governorates in Egypt

2004 | الكلمات المفتاحية
Spread and occurrence of sugar beet rhizomania caused by beet necrotic yellow vein Benyvirus in some Governorates in Egypt
Beet necrotic yellow vein Benyvirus (BNYVV) is the important soilborne virus disease in the production areas of sugar beet. In this study, field survey was carried out in sugar beet growing areas belonging to Kafrel-Sheikh, El-Behera, El-Dakahlia, El-Gharbia and El-Minia Governorates. The results of this survey revealed the presence of characteristic symptoms of rhizomania syndrome, ie stunted and constricted roots ... إقراء المزيد

Relationship between certain volatile components of lemongrass oil and its antiviral activities against bean yellow mosaic potyvirus.

2003 | الكلمات المفتاحية
Relationship between certain volatile components of lemongrass oil and its antiviral activities against bean yellow mosaic potyvirus.
The chemical composition and antiviral activity of the essential oil from lemongrass (_Cymbopogon citratus_) cultivated in Egypt were studied. The oil was fractionated into oxygenated and hydrocarbon fractions. The chemical composition of each fraction was investigated using GC and GC-MS. Results indicated that the major component of the hydrocarbon and the oxygenated fractions were myrcene and citral (92.8 and 92%, ... إقراء المزيد