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

Xiao Wang, Deyan Li and Xiaohui Song
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Xiao Wang: Anshun University, Anshun, P.R. China
Deyan Li: Anshun University, Anshun, P.R. China
Xiaohui Song: Anshun University, Anshun, P.R. China

Plant, Soil and Environment, 2023, vol. 69, issue 5, 202-209

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.

Keywords: climate change; CO2 concentration; abiotic stress; greenhouse gas; antioxidant enzymes (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:69:y:2023:i:5:id:125-2023-pse

DOI: 10.17221/125/2023-PSE

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