Intracellular ATP concentrations and energy charge were monitored during the growth of Spiroplasma citri and related to the number of colony-forming units, to the pH of the medium and to incorporation of radioactive precursors. Of three different methods used for extracting nucleotides trichloroacetic acid, perchloric acid and boiling Tris/H,SO, buffer the trichloroacetic acid treatment was the...

strains of spiroplasma citri have been classified into five groups based on electrophoretic mobility (em) of spiralin protein and rflp analysis of spiralin gene (foissac et al. 1996). in the present study, two isolates of s. citri qualifying for formation of a sixth group are reported. infection of sesame plants by s. citri has been reported previously (salehi and izadpanah 2002). samples of ve...