Exogenous Hemin Confers Cadmium Tolerance by Decreasing Cadmium Accumulation and Modulating Water Status and Matter Accumulation in Maize Seedlings

Cadmium (Cd) contamination harms plant growth and human health. The application of hemin (ferroprotoporphyrin IX) can effectively relieve abiotic stresses in plants. This work investigates the effects on alleviating Cd toxicity enhancing tolerance maize seedlings. In this study, seedlings were cultivated nutrient solutions, with a combination CdCl2 (464 ?mol L?1) (100 L?1). We measured status, water concentration, distribution results indicated that stress increased accumulation plants inhibited growth. However, alleviated inhibition improved balance, root morphology, vitality under stress. Additionally, 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA), total phenolic content, phenylalanine ammonia lyase (PAL) activity to enhance Hemin reduced translocation factor (TF), bioconcentration (BCF) Furthermore, concentrations cell wall soluble fraction seedling roots, which helped reduce transport from shoot. summary, exogenous could be used for adverse impacts induced by