Gül et al. 2024 — Cd and Pb phytotoxicity and accumulation in quinoa, greenhouse study, Turkey
Gül et al. conducted a greenhouse pot experiment testing the effects of Cd (50, 100, 200 mg/kg soil) and Pb (500, 1000, 2000 mg/kg soil) on quinoa (Chenopodium quinoa) growth parameters and antioxidant enzyme activities. While the primary framing is phytotoxicity and stress response, the study incidentally provides data on Cd and Pb accumulation in quinoa plant tissue under a range of soil contamination levels, including at the lower spike dose (50 mg Cd/kg soil) which, while still above typical ambient levels, is closer to contaminated agricultural reality in some mining-adjacent zones. Quinoa has received attention as a high-Cd-accumulating pseudocereal in some studies; this study provides Turkish context. Evidence tier B due to controlled spiked-soil conditions far above ambient and small Turkish journal.
Key numbers
- Soil Cd spike levels: 50, 100, 200 mg/kg (far above most ambient agricultural soils; background typically 0.1–2 mg/kg)
- Soil Pb spike levels: 500, 1000, 2000 mg/kg
- Plant height, root length, chlorophyll content, and antioxidant enzyme activities all declined with increasing Cd and Pb
- Cd accumulation in quinoa shoots and grain: reported in figures; higher shoot than grain accumulation pattern
- At 50 mg Cd/kg soil: shoot Cd approximately 100–200 mg/kg dry weight (hyperaccumulator-range concentrations)
- Study does not report ambient baseline quinoa grain Cd from normal soils
Methods (brief)
Greenhouse pot experiment; factorial design; spiked agricultural soil; AAS for Cd and Pb in plant tissue; antioxidant enzyme assays (SOD, CAT, POD); Turkey.
Implications
Certification: B-tier phytotoxicity study; not suitable as a primary source for quinoa ambient Cd. Confirms quinoa is an efficient Cd accumulator — relevant for sourcing from quinoa grown on Cd-contaminated soils (some Andean regions). Courses: Useful for illustrating Cd accumulation mechanisms in pseudocereals; reference alongside peer-reviewed ambient surveys of quinoa grain Cd from Andean production zones. App: This study alone is insufficient to set quinoa Cd estimates; should be used as mechanistic context alongside ambient survey data.