[Difference between two wheat cultivars in Cd and mineral nutrient uptake under different Cd levels]

Area of Science:

• Agricultural Science
• Environmental Science
• Plant Science

Context:

• Cadmium (Cd) contamination in soil poses a significant threat to crop production and food safety.
• Understanding plant responses to heavy metal stress is crucial for developing resilient agricultural practices.

Purpose:

• To investigate the effects of varying soil cadmium (Cd) concentrations on the growth and mineral nutrient uptake of two wheat cultivars.
• To compare the tolerance levels of wheat cultivars Genguo 534 and E18513 to Cd toxicity.

Summary:

• Both wheat cultivars showed growth stimulation at low Cd levels (0.03 mg.kg-1) but significant inhibition at high levels (> 0.3 mg.kg-1).
• Genguo 534 exhibited higher tolerance to Cd toxicity than E18513.
• Cd accumulation varied between cultivars, with Genguo 534 accumulating more Cd at lower concentrations and E18513 showing a faster increase at higher concentrations.
• Mineral nutrient uptake was significantly influenced by Cd, with E18513 showing reduced macro-nutrient content at 0.1 mg.kg-1 Cd compared to the control, while Genguo 534 remained largely unchanged.

Impact:

• This study provides insights into cultivar-specific responses to cadmium stress, informing breeding programs for enhanced crop resilience.
• Findings contribute to strategies for mitigating cadmium contamination risks in agricultural soils and ensuring food security.