grapevine rootstocks are of the potential to increase cultivars, adaptation to different climates, soil types and a variety of unfavorable conditions. considering the existence of a rich grapevine germplasm in iran, it is possible to pick up vigorous genotypes and cultivars as drought tolerant rootstocks for commercial use due to their vast genetic potential. in this study, 698 fruitful genotyp...

PRECISE INTERPRETATION OF OUR EXPERIMENTS SEEMS TO IMPOSE THE FOLLOWING CONCLUSIONS: Guinea pigs inoculated with washed Rickettsiae from Mexican typhus fever develop a disease identical with that resulting from inoculations with whole tunica scrapings, blood or other virulent material, and become thereby immunized to European typhus fever. The etiological agent of Mexican typhus fever is the Ri...