heavy-metal-stress
Heavy metal stress refers to the physiological and biochemical damage plants experience when exposed to excessive concentrations of toxic metals such as lead, cadmium, and zinc in their growing environment. This research area is critical for plant science because heavy metal accumulation impairs nutrient uptake, disrupts enzyme function, and induces oxidative stress that reduces crop productivity and threatens food safety. Understanding how plants respond to and tolerate heavy metal stress is essential for developing more resilient crop varieties and exploring phytoremediation strategies for contaminated agricultural lands.
PubMed · 2026-02-16
Researchers tested whether applying citric acid to tomato leaves can reduce lead contamination damage in seedlings, finding it may protect plant growth and physiological health—an important strategy for safer food production in contaminated soils.
Lead stress significantly reduced plant growth, water content, and photosynthetic pigments in tomato seedlings
Citric acid application demonstrated dose-dependent protective effects against lead toxicity
Foliar citric acid treatment enhanced physiological resilience and ionic content regulation