SUMMARY The tolerance of Holcus lanatus to lead, zinc and cadmium alone and in combination was studied in a factorial experiment. Cadmium/zinc, lead/cadmium and lead/cadmium/zinc interactions, as measured by their effect on root growth, occurred but were not consistent between the two populations. The population from a contaminated site showed a distinct tolerance to lead, zinc and cadmium in combination, compared to the non‐tolerant population. These results are discussed in relation to the literature of heavy metal tolerance and metal effects on plants.
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Coughtrey et al. (1978) studied this question.