Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2001.818.821AnwarQ.M.K. M. Jalaluddin 7200147Six commercial wheat vars. grown in micro plots showed VAM infection in their roots after 10 days of sowing the seeds. After lag phase VAM infection in all the 6 vars. progressed exponentially in a sigmoid fashion with increasing age of plants and then attaining a plateau state at a certain stage of growth which differed significantly variety wise (p<0.001). Of the six wheat vars., Blue Silver was found highly susceptible to the VAM fungi and showed highest VAM infection (80.3 ± 6.8 %) in their roots, whereas it was found least in Sonalika (65.2 ± 3.7 %). Histological study of VAM infected roots showed that the arbuscular structure appeared earlier than the vesicular structure. This information would be of great significance in boosting up the yield of wheat by growing and inoculating the var. Blue Silver on preferential basis in wheat fields of Sindh, Pakistan.]]>Crush, J.R.,197819473476Giovannetti, M. and B. Mosse,198084489500Harley, J.L.,198992129139Harley, J.L. and S.E. Smith,1983Pages: 483Pages: 483Kormanik, P.P. and A.C. McGraw,19821982pp: 37-45pp: 37-45Koske, R.E. and J.N. Gemma,198992486505Land, S. and F. Shonbeck,199113944Powell, C.L. and D.J. Bagyaraj,1984Pages: 234Pages: 234Sieverding, E.,19911991Smith, F.A. and S.E. Smith,198188722725Zar, J.H.,19842nd Edn.,Pages: 718Pages: 718