Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2002.12.18HammadIbtisam 1200251Three populations of Plantago lanceolata L. were analyzed for genetic differentiation and phenotypic plasticity. Eight randomly taken samples of each population were grown at two nutrient levels and subjected to alterations in mineral supply. Growth and root respiration was followed during the experiment. With respect to all measured characteristic genetic differentiation on population level was demonstrated. Overall phenotypic plasticity of the measured characteristics and differences in estimated genetic variation were present. High relative growth rate was correlated with high root respiration. High relative growth rate was correlated with high root respiration and high Ca2+_ Mg2+- stimulated ATPase activity in roots. Ecological significance of the results and correlation with habitat properties are discussed.]]>Bieleski, R.L.,197324225252Bjoerkman, O. and P. Holmgren,196619854859Boecher, T.W.,1943Plantago Lanceolata L.]]>11119Bradshaw, A.D., 196513115155Brown, M.J.,1983P. pantago paradoxa Hook. F. in mosaic environments.]]>3133233330Ernst, W.H.O.,1983964971Farris, M.A. and B.A. Schaal,1983Rumex acetosella (Polygonaceae).]]>70246255Foy, C.D., P.W. Voigt and J.W. Schwartz,198072859862Groenendijk, C.F.M., J.M. Sandbrink, J.V. Brederode and J.M. van Damme,1997Plantago lanceolata L.]]>787583Van Hinsberg, A.,1997Plantago lanceolata L: Effect of light quality and growth regulators on sun and shade populations.]]>110687701Hooglander, N. and B.M.R. Lumaret,1993Plantago sp.]]>70322334Kuiper, D. and P.J.C. 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