Figure 2
From: Common weeds as heavy metal bioindicators: a new approach in biomonitoring

Principal component analysis of heavy metal concentrations, bioconcentration factor (BCF) and translocation factor (TF) in examined samples (abbreviations see “Materials and methods”) in relation to photosynthesis activity parameters: net photosynthetic rate PN, stomatal conductance gs and intercellular CO2 concentration and (Ci), chlorophyll parameters and dry mass, relative water content (RWC) and cell membrane stability (MSI).