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Elevated CO2 mitigates the effects of cadmium stress on vegetable growth and antioxidant systems

Author

Listed:
  • Xiao Wang

    (Anshun University, Anshun, P.R. China)

  • Deyan Li

    (Anshun University, Anshun, P.R. China)

  • Xiaohui Song

    (Anshun University, Anshun, P.R. China)

Abstract

Previous studies of the effects of elevated CO2 (eCO2) concentrations and heavy metal stress conditions on plant growth and physiology have mostly focused on crops rather than vegetables. In this study, we investigated the effects of Cd stress on the growth and antioxidant system of pak choi (Brassica rapa L.), water spinach (Ipomoea aquatica Forssk.), cherry radish (Raphanus raphanistrum subsp. sativus (L.) Domin) and pepper (Capsicum annuum L.) growing in pots under ambient CO2 (aCO2) or eCO2 conditions. In general, Cd stress reduced plant biomass and SPAD values under aCO2 and eCO2 conditions; however, the reduction was smaller under eCO2. Cd stress significantly reduced vegetable superoxide dismutase (SOD) and catalase (CAT) activities under both aCO2 and eCO2 conditions; however, the decrease in cherry radish and pepper peroxidase and SOD activities and in pak choi SOD and CAT activities was significantly less under eCO2. The Cd content of the edible parts of pak choi, water spinach and pepper was significantly lower under eCO2 than under aCO2. Our data suggest that eCO2 concentrations could be beneficial for the growth of some vegetables and reduce the Cd content.

Suggested Citation

  • Xiao Wang & Deyan Li & Xiaohui Song, 2023. "Elevated CO2 mitigates the effects of cadmium stress on vegetable growth and antioxidant systems," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 69(5), pages 202-209.
    • Handle: RePEc:caa:jnlpse:v:69:y:2023:i:5:id:125-2023-pse
    DOI: 10.17221/125/2023-PSE
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