Fig. 2.
Effect of Cd on (A) chlorophyll content and (B) dry shoot biomass in hydroponically grown A. halleri NM (I28, SK2) and M (AU, PL15, PL22. I16) populations and A. lyrata petraea (LYR). Plants were cultivated for 3 weeks in a solution containing 5 μM CdSO4. Values are expressed relative to control conditions (0 μM CdSO4). Data are the mean ±SD, n=7, 10, 4, 10, 11, 7, and 16, respectively. Asterisks and letters indicate significant differences at the 5% level between treatments and among populations, respectively. (This figure is available in colour at JXB online.)