Natural selection in plantago species : a genetical analysis of ecologically relevant morphological variability / Kirsten WolffPhysiology and ecology of ammonium and nitrate nutrition in plantago and alnus / door Tjeerd BlacquièreSalt-to[l]erance in plantago and application of the patch-clamp technique in plant cell membranes / Frans MaathuisThe response of herbaceous plants to elevated CO2 : short-term modification of C and N partitioning and growth of Plantago Major SSP. Pleiosperma / Filomena Maria Coelho Guerra da FonsecaGenetic differentiation and phenotypic plasticity in Plantago species / Daan KuiperGenetic variability in Plantago species in relation to their ecology / Hendrik van DijkXylem/symplast ion exchange : mechanism and function in salt-tolerance and growth / door Albertus Henderikus de Boer