الفهرس 
Review of LiteratureOnly 14 pages are availabe for public view
 |  | from | 139 |  |  |
| | | from | 139 | | |
Abstract
The potato crop of the most important vegetable crops widespread in the world, occupies the fourth place food crop after wheat, rice, corn, potatoes infected with a variety of causes of disease, including fungal diseases , bacterial , viral diseases and result in heavy losses. The viral diseases of the most serious diseases facing the cultivation of potatoes and of the determinants of success. Defend the plant itself against environmental conditions harmful and stress the dynamic that results from the causes of diseases (fungi, bacteria, nematodes and viroids and viruses), and although the plants respond to pathogens, but it resistant to activate a variety of defense mechanisms to activate genes of defense and adjustment of status phosfor protein and activation enzymes to make certain modifications of the primary metabolism and secondary education. Such as antioxidant enzymes, NADP, Malic enzyme, PEPC, PPDK of resistance to virus Y. Built this study on the use of certain materials in the in vitro that helps the plant to resist the virus has been the use of Fe-EDTA and Saliclic acid and yeast extract in various concentrations and the extent of their influence on vegetative growth and also the content of the plants from some defense mechanisms (Total soluble sugar , Total soluble amino acid , Total soluble phenols, Peroxidase activity , Catalase activity and Polyphenol oxidase activity ) as expressed after primary virus Y infection of potato Sponta and Diamont cv in vitro .