Fig. 7

Changes of SOD in lithophytic bryophytes in different calcium environments. A The changes of SOD content of three lithophytic bryophytes cultured in different concentrations of Ca²⁺ solution for 7 days. B The changes of SOD content of three lithophytic bryophytes after 7 days in Ca²⁺ 50 mmol/L solution. C The changes of SOD content of three lithophytic bryophytes after 7 days in Ca²⁺ 100 mmol/L solution. D The changes of SOD content of three lithophytic bryophytes after 7 days of culture in Ca²⁺ 200 mmol/L solution. E The changes of SOD content of three lithophytic bryophytes after 7 days in Ca²⁺ 400 mmol/L solution. F Changes of SOD content of three lithophytic bryophytes after 7 days of culture in Ca²⁺ 800 mmol/L solution