were centrifuged at 3000 rpm for 30 minutes. Taken supernatant (2 ml)
was mixed with two drops of orthophosphoric acid and 4 ml of Salcowsci reagent (50 ml, 35% of the sulfuric acid
(H2SO4), 1 ml of 0.5 M solution of FeCl3). To Indicated to IAA production by Pink discoloration showed