In humans, the activation of sympathetic nervous system stimulates the adrenal medulla to release certain hormones that help in flight and fight response. A similar type of response in plants can be given by

Step-by-step solution

Abscisic acid (ABA) is an inhibitory plant hormone also known as 'dormin' hormone as it promotes seed dormancy and inhibits growth. ABA is a stress hormone as it helps the plant survive different kinds of environmental stresses. It also stimulates the closure of stomata. It acts as the antagonist of the gibberellic acid.