Fulvic acid and hydrogen sulfide synergistically mitigate chromium stress in tobacco seedlings by regulating oxidative stress indicators and antioxidant defense mechanisms.
Fulvic acid and hydrogen sulfide together reduce chromium accumulation by up to 71% and improve growth and photosynthesis in tobacco seedlings under Cr stress.
- Why it matters: Chromium toxicity hampers crop productivity and plant health, and understanding mitigation strategies is vital for sustainable agriculture in contaminated soils.
- What they did: The study applied fulvic acid and hydrogen sulfide, alone and combined, to tobacco seedlings exposed to Cr stress, measuring growth, biochemical responses, ultrastructure, and gene expression.
- The result: Combined treatment significantly enhanced antioxidant enzyme activities, decreased Cr accumulation, protected leaf ultrastructure, and upregulated photosynthesis-related genes, enabling better plant resilience.