Role of Brassinosteroids and Its Cross Talk with Other Phytohormone in Plant Responses to Heavy Metal Stress

Brassinosteroids (BRs) assume crucial part in plant development, formative cycles, and plant reaction to different abiotic stresses. From one viewpoint, plant chemicals may reserve limited assets to the most genuine burdens; then again, the cross discussions among different plant chemical signaling manage the harmony between plant development and its safeguard system under distressing conditions. It is well documented that the cross talks between brassinosteroids and various plant hormones such as auxin, cytokinin, gibberellin, abscisic acid, ethylene, salicylic acid, jasmonic acid, nitric oxide, hydrogen peroxide, and glucose are well established. Based on these studies, this chapter focusses on the cross talks between BRs and signaling of other plant hormones for the regulation of the balance between growth in plants and defensive responses under heavy metal stress. It has been observed that considerable work is required to reveal the mechanism related with BRs and other plant hormones to regulate plant growth and its metabolism under heavy metal stress. At last, it was also found that BRs act as a primary signal molecule in the phytohormone signaling network in plants under metal stress.