My work is on the assessment of the SAR ( Systemic acquired Resistance) and ISR (Induced Systemic Resistance) by the measurement of some molecular markers such as Phytohormones and proteines.
all your answers are very useful. But the problem is we are currently setting up the laboratory equipment and we have not purshased nor HPLC neither GC-MC yet. So I was thinking to use a method to measure theses Phytohormones by spectrophotometer If possible of course.