Answers are grounded in this paper and cite their sources.
In long‐term experiments the influence of various combinations of O3, SO2 and NO2 on peroxidase activity, superoxide dismutase activity as well as on proline contents of spruce needles was studied. The reactions of these parameters varied depending on the type of pollution and the needle age. Peroxidase and superoxide dismutase activity were also influenced by Mg and Ca supply of the plants.
No takes yet. Share an insight, caveat, or question.
Klumpp et al. (1989) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: