Abstract
Aims The valuable ornamental plant Canna indica is widely distributed in city gardens and on roadsides in China. Our objective was to study the stress responses of C. indica to cadmium (Cd) and its accumulation of Cd. Methods With pot culture experiments, C. indica was cultured with different Cd concentrations. Morphological, ecological, physiological indexes were observed during the growth of C. indica. The distribution of Cd in C. in- dica plants was determined after harvest. Important findings The Cd treatment of 5 mg·kg -1 inhibited growth. The flowering period was prolonged with shoot. With increasing Cd concentration of the medium, Cd concentration in shoots and roots increased; however, the accumulator and translocation factors de- creased gradually. The maximum accumulation of Cd in C. indica was 5.89 mg·plant -1 with the treatment of 20 mg·kg -1 . It is concluded that C. indica is suitable for landscaping use when the Cd concentration in soil is <1 mg·kg -1 .
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