Aphids, a hemipteran group of insects pose a serious threat to many of the major crop species including Brassica oilseeds. Transgenic strategies for developing aphid-resistant plant types necessitate phloem-bound expression of the insecticidal genes. A few known phloem-specific promoters, in spite of tissue-specific activity fail to confer high level gene-expression. Here, we identified seven o...

32 Abstract Antibiotic growth promoters have been extensively used in the poultry feed to improve weight gain, feed efficiency, lessen the number of harmful bacteria, enhance immunity etc. However, they have role in development of the resistance in the pathogenic bacteria and impose negative impact on the consumers due to residues. Medicinal plants are the best replacement option of ABGP. Garli...

Chamomile is one of the most wide spread medicinal plant cultivated in Egypt. This work aimed at enhancement of blossoms and oil production of chamomile plants via biofertilization with PGPRs under organic farming system. In this study, 6 bacterial strains were applied using two different inoculation techniques. The first application method was throughout soaking the roots of seedlings in the b...

The effect of the tumor promoter 12-O-tetradecanoylphorbol-13-acetate (TPA) and other diterpene derivatives on the binding of epidermal growth factor (EGF) to primary cultures of mouse epidermal cells was studied. 125I-EGF was used to study the specific binding of the growth factor to monolayer cultures of mouse epidermal cells grown under low-calcium culture conditions (0.06 mM Ca2+). Under th...

The phoPR operon encodes a response regulator, PhoP, and a histidine kinase, PhoR, which activate or repress genes of the Bacillus subtilis Pho regulon in response to an extracellular phosphate deficiency. Induction of phoPR upon phosphate starvation required activity of both PhoP and PhoR, suggesting autoregulation of the operon, a suggestion that is supported here by PhoP footprinting on the ...