Dear Editor,Phytohormones have been described as essential regulators of various processes throughout plant life,forming a strong interactive network.Because of this important function,they are central and integrative modulators forming a physiological key interface between plant responses and primary parameters such as genotype,environmental conditions,and developmental status.Consequently,the determination of the phytohormone signature as a key physiological parameter is necessary to understand the correlations between genotype and phenotype,as well as the influence of exogenous modulations on the phenotype (Yin et al.,2004).