Influence of Cadmium Metal Toxicity on Hormones Profiling of Brassica juncea L. Plants

Heavy metals are major environmental pollutants, which may prove toxic to living organisms by entering through food chain. Toxicity of heavy metals produce oxidative burst by generation of reactive oxygen species. Plants possess various growth regulators, which help in scavenging the free radicals and thus protect the plants from various types of environmental stresses. In the present study, Brassica juncea plants subjected to different concentrations (0, 0.2, 0.4 and 0.6mM) of cadmium (Cd) metal to observe the hormones profiling. LC/MS study revealed the increased expression of different plant growth regulators like polyamines, brassinosteroids, auxins, abscisic acid, gibberellic acid and jasmonic acid under metal stressed conditions. In conclusion, endogenous level of plant growth regulators got activated due to heavy metal stress, which protects the plants by scavenging free radicals.